Property:Special status

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Amaranthus wrightii +
Endemic  +
Amauriopsis dissecta +
Illustrated  +
Amberboa moschata +
Introduced  +, Illustrated  +
Amblyodon dealbatus +
Illustrated  +
Amblyolepis setigera +
Illustrated  +
Amblyopappus pusillus +
Illustrated  +
Amblystegium serpens +
Illustrated  +
Ambrosia acanthicarpa +
Endemic  +
Ambrosia artemisiifolia +
Illustrated  +, Endemic  +
Ambrosia bidentata +
Endemic  +
Ambrosia eriocentra +
Illustrated  +, Endemic  +
Ambrosia grayi +
Endemic  +
Ambrosia linearis +
Endemic  +
Ambrosia salsola +
Illustrated  +
Ambrosia tomentosa +
Endemic  +
Ambrosia trifida +
Illustrated  +
Amelanchier +
Endemic  +
Amelanchier alnifolia +
Endemic  +
Amelanchier alnifolia var. alnifolia +
Endemic  +
Amelanchier alnifolia var. pumila +
Endemic  +
Amelanchier alnifolia var. semiintegrifolia +
Endemic  +
Amelanchier amabilis +
Endemic  +
Amelanchier arborea +
Endemic  +
Amelanchier bartramiana +
Endemic  +
Amelanchier canadensis +
Endemic  +
Amelanchier canadensis var. canadensis +
Endemic  +
Amelanchier canadensis var. obovalis +
Endemic  +
Amelanchier cusickii +
Endemic  +
Amelanchier fernaldii +
Endemic  +
Amelanchier gaspensis +
Endemic  +
Amelanchier humilis +
Endemic  +
Amelanchier interior +
Endemic  +
Amelanchier intermedia +
Endemic  +
Amelanchier laevis +
Endemic  +, Illustrated  +
Amelanchier nantucketensis +
Endemic  +, Illustrated  +
Amelanchier nitens +
Endemic  +
Amelanchier pallida +
Endemic  +
Amelanchier sanguinea +
Endemic  +, Illustrated  +
Amelanchier spicata +
Endemic  +
Amelanchier utahensis +
Illustrated  +
Amerorchis rotundifolia +
Illustrated  +, Endemic  +
Amianthium muscitoxicum +
Illustrated  +, Endemic  +
Ammophila arenaria +
Introduced  +
Ammophila breviligulata +
Endemic  +
Ammophila breviligulata subsp. breviligulata +
Endemic  +
Ammophila breviligulata subsp. champlainensis +
Endemic  +
Amoreuxia gonzalezii +
Conservation concern  +
Amoreuxia palmatifida +
Illustrated  +
Amoreuxia wrightii +
Illustrated  +
Ampelaster carolinianus +
Illustrated  +, Endemic  +
Ampelodesmos mauritanicus +
Introduced  +
Ampelopsis aconitifolia +
Introduced  +
Ampelopsis cordata +
Illustrated  +, Endemic  +
Ampelopsis glandulosa +
Introduced  +
Amphiachyris amoena +
Endemic  +
Amphiachyris dracunculoides +
Illustrated  +, Endemic  +
Amphicarpum muhlenbergianum +
Endemic  +
Amphidium californicum +
Endemic  +, Illustrated  +
Amphidium lapponicum +
Illustrated  +
Amphidium mougeotii +
Illustrated  +
Amphipappus fremontii +
Illustrated  +, Endemic  +
Amphipappus fremontii var. fremontii +
Illustrated  +, Endemic  +
Amphipappus fremontii var. spinosus +
Endemic  +
Amphiscirpus nevadensis +
Illustrated  +
Anacamptodon splachnoides +
Illustrated  +
Anacolia menziesii +
Illustrated  +
Anagallis arvensis +
Weedy  +, Introduced  +, Illustrated  +
Anagallis minima +
Illustrated  +
Anaphalis margaritacea +
Illustrated  +
Ancistrocactus scheeri +
Illustrated  +
Ancistrocarphus filagineus +
Illustrated  +
Andromeda polifolia +
Illustrated  +
Andromeda polifolia var. latifolia +
Illustrated  +
Andromeda polifolia var. polifolia +
Illustrated  +
Andropogon arctatus +
Endemic  +
Andropogon brachystachyus +
Endemic  +
Andropogon floridanus +
Endemic  +
Andropogon liebmannii +
Endemic  +
Andropogon tracyi +
Endemic  +
Androsace chamaejasme +
Illustrated  +
Androsace chamaejasme subsp. lehmanniana +
Illustrated  +, Endemic  +
Androsace occidentalis +
Illustrated  +, Endemic  +
Androsace septentrionalis +
Weedy  +, Illustrated  +
Androstephium breviflorum +
Illustrated  +, Endemic  +
Androstephium coeruleum +
Endemic  +
Anelsonia eurycarpa +
Illustrated  +, Endemic  +
Anemia adiantifolia +
Illustrated  +
Anemia mexicana +
Illustrated  +
Anemia wrightii +
Illustrated  +
Anemone acutiloba +
Endemic  +, Illustrated  +
Anemone americana +
Endemic  +, Illustrated  +
Anemone berlandieri +
Endemic  +, Illustrated  +
Anemone canadensis +
Endemic  +, Illustrated  +
Anemone caroliniana +
Endemic  +
Anemone cylindrica +
Endemic  +
Anemone deltoidea +
Endemic  +, Illustrated  +
Anemone drummondii var. lithophila +
Endemic  +
Anemone edwardsiana +
Endemic  +
Anemone edwardsiana var. edwardsiana +
Endemic  +
Anemone edwardsiana var. petraea +
Conservation concern  +, Endemic  +
Anemone grayi +
Endemic  +
Anemone lancifolia +
Endemic  +
Anemone lyallii +
Endemic  +
Anemone multiceps +
Endemic  +
Anemone multifida +
Illustrated  +
Anemone multifida var. multifida +
Illustrated  +
Anemone multifida var. saxicola +
Conservation concern  +, Endemic  +
Anemone multifida var. stylosa +
Conservation concern  +, Endemic  +
Anemone multifida var. tetonensis +
Endemic  +
Anemone narcissiflora +
Illustrated  +
Anemone narcissiflora var. monantha +
Illustrated  +
Anemone narcissiflora var. villosissima +
Illustrated  +
Anemone narcissiflora var. zephyra +
Endemic  +
Anemone occidentalis +
Endemic  +
Anemone okennonii +
Endemic  +
Anemone oregana +
Illustrated  +, Endemic  +
Anemone oregana var. felix +
Conservation concern  +, Endemic  +
Anemone oregana var. oregana +
Endemic  +, Illustrated  +
Anemone parviflora +
Illustrated  +
Anemone patens +
Illustrated  +
Anemone patens var. multifida +
Illustrated  +
Anemone piperi +
Endemic  +
Anemone quinquefolia +
Illustrated  +, Endemic  +
Anemone quinquefolia var. minima +
Endemic  +
Anemone quinquefolia var. quinquefolia +
Endemic  +, Illustrated  +
Anemone richardsonii +
Illustrated  +
Anemone tuberosa +
Illustrated  +
Anemone virginiana +
Illustrated  +, Endemic  +
Anemone virginiana var. alba +
Endemic  +
Anemone virginiana var. cylindroidea +
Endemic  +
Anemone virginiana var. virginiana +
Endemic  +, Illustrated  +
Anemopsis californica +
W2  +, Illustrated  +
Angelonia +
Introduced  +
Angelonia gardneri +
Introduced  +, Illustrated  +
Anisocarpus madioides +
Illustrated  +, Endemic  +
Anisocarpus scabridus +
Endemic  +, Conservation concern  +
Anisocoma acaulis +
Illustrated  +
Annona glabra +
Illustrated  +
Annona squamosa +
Introduced  +
Anoda abutiloides +
Illustrated  +
Anoda cristata +
Weedy  +
Anomobryum concinnatum +
Illustrated  +
Anomobryum julaceum +
Illustrated  +
Anomodon tristis +
Illustrated  +
Anredera cordifolia +
Introduced  +, Illustrated  +
Anredera vesicaria +
Illustrated  +
Antennaria anaphaloides +
Endemic  +
Antennaria arcuata +
Endemic  +, Conservation concern  +
Antennaria argentea +
Endemic  +
Antennaria aromatica +
Endemic  +
Antennaria corymbosa +
Endemic  +
Antennaria densifolia +
Endemic  +
Antennaria dimorpha +
Endemic  +
Antennaria flagellaris +
Illustrated  +, Endemic  +
Antennaria friesiana subsp. alaskana +
Endemic  +
Antennaria friesiana subsp. neoalaskana +
Endemic  +
Antennaria geyeri +
Illustrated  +, Endemic  +
Antennaria howellii +
Endemic  +
Antennaria howellii subsp. canadensis +
Endemic  +
Antennaria howellii subsp. howellii +
Endemic  +
Antennaria howellii subsp. neodioica +
Endemic  +
Antennaria howellii subsp. petaloidea +
Endemic  +
Antennaria lanata +
Illustrated  +, Endemic  +
Antennaria luzuloides +
Endemic  +
Antennaria luzuloides subsp. aberrans +
Endemic  +
Antennaria luzuloides subsp. luzuloides +
Endemic  +
Antennaria media +
Endemic  +
Antennaria microphylla +
Illustrated  +, Endemic  +
Antennaria monocephala +
Illustrated  +
Antennaria monocephala subsp. angustata +
Endemic  +
Antennaria monocephala subsp. monocephala +
Illustrated  +
Antennaria neglecta +
Endemic  +
Antennaria parlinii +
Endemic  +
Antennaria parlinii subsp. fallax +
Endemic  +
Antennaria parlinii subsp. parlinii +
Endemic  +
Antennaria plantaginifolia +
Illustrated  +, Endemic  +
Antennaria pulchella +
Endemic  +
Antennaria pulcherrima +
Endemic  +
Antennaria pulcherrima subsp. eucosma +
Endemic  +
Antennaria pulcherrima subsp. pulcherrima +
Endemic  +
Antennaria racemosa +
Endemic  +
Antennaria rosea +
Endemic  +
Antennaria rosea subsp. arida +
Endemic  +
Antennaria rosea subsp. confinis +
Endemic  +
Antennaria rosea subsp. pulvinata +
Endemic  +
Antennaria rosea subsp. rosea +
Endemic  +
Antennaria rosulata +
Endemic  +
Antennaria solitaria +
Endemic  +
Antennaria stenophylla +
Endemic  +
Antennaria suffrutescens +
Endemic  +
Antennaria umbrinella +
Illustrated  +, Endemic  +
Antennaria virginica +
Endemic  +
Anthemis arvensis +
Introduced  +, Illustrated  +
Anthemis cotula +
Introduced  +
Anthephora hermaphrodita +
Introduced  +
Anthoxanthum aristatum +
Introduced  +
Anthoxanthum odoratum +
Introduced  +
Antigonon leptopus +
Introduced  +, Illustrated  +
Antirrhinum +
Introduced  +
Antirrhinum majus +
Weedy  +, Introduced  +, Illustrated  +
Antitrichia californica +
Illustrated  +
Antitrichia curtipendula +
Illustrated  +
Anulocaulis annulatus +
Illustrated  +, Endemic  +
Anulocaulis leiosolenus +
Illustrated  +
Anulocaulis leiosolenus var. gypsogenus +
Endemic  +
Anulocaulis leiosolenus var. howardii +
Illustrated  +
Anulocaulis leiosolenus var. lasianthus +
Illustrated  +
Anulocaulis leiosolenus var. leiosolenus +
Illustrated  +
Anulocaulis reflexus +
Conservation concern  +
Apacheria +
Conservation concern  +, Endemic  +
Apacheria chiricahuensis +
Conservation concern  +, Endemic  +, Illustrated  +
Apera interrupta +
Introduced  +
Apera spica-venti +
Introduced  +
Aphanes arvensis +
Introduced  +
Aphanes australis +
Introduced  +
Aphanes occidentalis +
Illustrated  +
Aphanisma blitoides +
Illustrated  +, Conservation concern  +
Aphanostephus pilosus +
Endemic  +
Aphanostephus ramosissimus +
Illustrated  +
Aphanostephus ramosissimus var. humilis +
Illustrated  +
Aphanostephus ramosissimus var. ramosissimus +
Illustrated  +
Aphanostephus skirrhobasis var. skirrhobasis +
Endemic  +
Aphragmus eschscholtzianus +
Illustrated  +
Aplectrum hyemale +
Illustrated  +, Endemic  +
Aplodon wormskioldii +
Illustrated  +
Apodanthera undulata +
Illustrated  +
Apodanthera undulata var. undulata +
Illustrated  +
Aptenia cordifolia +
Introduced  +, Illustrated  +
Apteria aphylla +
Illustrated  +
Aquilegia barnebyi +
Endemic  +
Aquilegia brevistyla +
Endemic  +, Illustrated  +
Aquilegia canadensis +
Endemic  +, Illustrated  +
Aquilegia chaplinei +
Conservation concern  +, Endemic  +
Aquilegia chrysantha +
Illustrated  +
Aquilegia coerulea +
Endemic  +
Aquilegia coerulea var. alpina +
Conservation concern  +, Endemic  +
Aquilegia coerulea var. coerulea +
Endemic  +
Aquilegia coerulea var. ochroleuca +
Endemic  +
Aquilegia coerulea var. pinetorum +
Endemic  +
Aquilegia desertorum +
Endemic  +
Aquilegia elegantula +
Illustrated  +
Aquilegia eximia +
Endemic  +, Illustrated  +
Aquilegia flavescens +
Endemic  +, Illustrated  +
Aquilegia formosa +
Illustrated  +
Aquilegia formosa var. formosa +
Endemic  +
Aquilegia formosa var. hypolasia +
Illustrated  +
Aquilegia formosa var. truncata +
Endemic  +, Illustrated  +
Aquilegia hinckleyana +
Conservation concern  +, Endemic  +
Aquilegia jonesii +
Endemic  +, Illustrated  +
Aquilegia laramiensis +
Conservation concern  +, Endemic  +
Aquilegia micrantha +
Endemic  +, Illustrated  +
Aquilegia pubescens +
Endemic  +, Illustrated  +
Aquilegia saximontana +
Conservation concern  +, Endemic  +, Illustrated  +
Aquilegia scopulorum +
Endemic  +, Illustrated  +
Aquilegia shockleyi +
Endemic  +
Aquilegia vulgaris +
W1  +, Introduced  +
Arabidopsis thaliana +
Weedy  +, Introduced  +
Arabis aculeolata +
Endemic  +
Arabis blepharophylla +
Illustrated  +, Endemic  +
Arabis caucasica +
Introduced  +
Arabis crucisetosa +
Endemic  +
Arabis eschscholtziana +
Endemic  +
Arabis furcata +
Endemic  +
Arabis georgiana +
Endemic  +, Conservation concern  +
Arabis mcdonaldiana +
Endemic  +, Conservation concern  +
Arabis modesta +
Endemic  +
Arabis nuttallii +
Endemic  +
Arabis olympica +
Endemic  +
Arabis oregana +
Endemic  +
Arabis patens +
Endemic  +
Arachniodes simplicior +
Introduced  +, Illustrated  +
Arbutus menziesii +
Illustrated  +, Endemic  +
Arceuthobium americanum +
Illustrated  +, Endemic  +
Arceuthobium campylopodum +
Illustrated  +
Arceuthobium campylopodum subsp. abietinum +
Illustrated  +
Arceuthobium campylopodum subsp. apachecum +
Illustrated  +
Arceuthobium campylopodum subsp. blumeri +
Illustrated  +
Arceuthobium campylopodum subsp. californicum +
Endemic  +
Arceuthobium campylopodum subsp. campylopodum +
Illustrated  +
Arceuthobium campylopodum subsp. cyanocarpum +
Endemic  +
Arceuthobium campylopodum subsp. laricis +
Endemic  +
Arceuthobium campylopodum subsp. littorum +
Endemic  +
Arceuthobium campylopodum subsp. microcarpum +
Endemic  +
Arceuthobium campylopodum subsp. monticola +
Endemic  +
Arceuthobium campylopodum subsp. occidentale +
Endemic  +
Arceuthobium campylopodum subsp. siskiyouense +
Endemic  +
Arceuthobium campylopodum subsp. tsugense +
Endemic  +
Arceuthobium pusillum +
Illustrated  +, Endemic  +
Arctanthemum arcticum +
Illustrated  +
Arctanthemum arcticum subsp. arcticum +
Illustrated  +
Arctanthemum arcticum subsp. polare +
Illustrated  +
Arctium lappa +
Introduced  +
Arctium minus +
Introduced  +, Illustrated  +
Arctium tomentosum +
Introduced  +
Arctomecon californica +
Conservation concern  +, Endemic  +, Illustrated  +
Arctomecon humilis +
Conservation concern  +, Endemic  +, Illustrated  +
Arctomecon merriamii +
Endemic  +, Conservation concern  +
Arctostaphylos andersonii +
Endemic  +, Conservation concern  +
Arctostaphylos auriculata +
Endemic  +, Conservation concern  +
Arctostaphylos bakeri +
Endemic  +, Conservation concern  +
Arctostaphylos bakeri subsp. bakeri +
Endemic  +, Conservation concern  +
Arctostaphylos bakeri subsp. sublaevis +
Endemic  +, Conservation concern  +
Arctostaphylos canescens +
Illustrated  +, Endemic  +
Arctostaphylos canescens subsp. canescens +
Illustrated  +, Endemic  +
Arctostaphylos canescens subsp. sonomensis +
Endemic  +
Arctostaphylos catalinae +
Endemic  +, Conservation concern  +
Arctostaphylos columbiana +
Illustrated  +, Endemic  +
Arctostaphylos confertiflora +
Endemic  +, Conservation concern  +
Arctostaphylos cruzensis +
Endemic  +, Conservation concern  +
Arctostaphylos densiflora +
Endemic  +, Conservation concern  +
Arctostaphylos edmundsii +
Endemic  +, Conservation concern  +
Arctostaphylos franciscana +
Endemic  +, Conservation concern  +
Arctostaphylos glandulosa +
Illustrated  +
Arctostaphylos glandulosa subsp. adamsii +
Conservation concern  +
Arctostaphylos glandulosa subsp. crassifolia +
Conservation concern  +
Arctostaphylos glandulosa subsp. cushingiana +
Illustrated  +
Arctostaphylos glandulosa subsp. gabrielensis +
Illustrated  +
Arctostaphylos glandulosa subsp. glandulosa +
Illustrated  +
Arctostaphylos glandulosa subsp. howellii +
Illustrated  +
Arctostaphylos glandulosa subsp. leucophylla +
Illustrated  +
Arctostaphylos glandulosa subsp. mollis +
Endemic  +
Arctostaphylos glauca +
Illustrated  +
Arctostaphylos glutinosa +
Endemic  +, Conservation concern  +
Arctostaphylos hispidula +
Endemic  +
Arctostaphylos hookeri +
Endemic  +
Arctostaphylos hookeri subsp. hearstiorum +
Endemic  +
Arctostaphylos hookeri subsp. hookeri +
Endemic  +
Arctostaphylos hooveri +
Endemic  +, Conservation concern  +
Arctostaphylos imbricata +
Endemic  +, Conservation concern  +
Arctostaphylos insularis +
Endemic  +, Conservation concern  +
Arctostaphylos klamathensis +
Endemic  +, Conservation concern  +
Arctostaphylos luciana +
Endemic  +, Conservation concern  +
Arctostaphylos malloryi +
Endemic  +, Conservation concern  +
Arctostaphylos manzanita +
Endemic  +
Arctostaphylos manzanita subsp. elegans +
Endemic  +
Arctostaphylos manzanita subsp. glaucescens +
Endemic  +
Arctostaphylos manzanita subsp. laevigata +
Endemic  +
Arctostaphylos manzanita subsp. manzanita +
Endemic  +
Arctostaphylos manzanita subsp. roofii +
Endemic  +
Arctostaphylos manzanita subsp. wieslanderi +
Endemic  +
Arctostaphylos mewukka +
Endemic  +
Arctostaphylos mewukka subsp. mewukka +
Endemic  +
Arctostaphylos mewukka subsp. truei +
Endemic  +
Arctostaphylos montaraensis +
Endemic  +, Conservation concern  +
Arctostaphylos montereyensis +
Endemic  +, Conservation concern  +
Arctostaphylos morroensis +
Endemic  +, Conservation concern  +
Arctostaphylos myrtifolia +
Endemic  +, Conservation concern  +
Arctostaphylos nevadensis +
Endemic  +
Arctostaphylos nevadensis subsp. knightii +
Endemic  +
Arctostaphylos nevadensis subsp. nevadensis +
Endemic  +
Arctostaphylos nissenana +
Endemic  +, Conservation concern  +
Arctostaphylos nortensis +
Endemic  +, Conservation concern  +
Arctostaphylos nummularia +
Endemic  +, Conservation concern  +
Arctostaphylos nummularia subsp. mendocinoensis +
Endemic  +, Conservation concern  +
Arctostaphylos nummularia subsp. nummularia +
Endemic  +, Conservation concern  +
Arctostaphylos obispoensis +
Endemic  +
Arctostaphylos otayensis +
Endemic  +, Conservation concern  +
Arctostaphylos pacifica +
Endemic  +, Conservation concern  +
Arctostaphylos pajaroensis +
Illustrated  +, Endemic  +, Conservation concern  +
Arctostaphylos pallida +
Endemic  +, Conservation concern  +
Arctostaphylos parryana +
Endemic  +
Arctostaphylos parryana subsp. desertica +
Endemic  +
Arctostaphylos parryana subsp. parryana +
Endemic  +
Arctostaphylos parryana subsp. tumescens +
Endemic  +
Arctostaphylos patula +
Illustrated  +
Arctostaphylos pilosula +
Endemic  +, Conservation concern  +
Arctostaphylos pringlei +
Illustrated  +
Arctostaphylos pringlei subsp. drupacea +
Illustrated  +
Arctostaphylos pringlei subsp. pringlei +
Illustrated  +
Arctostaphylos pumila +
Endemic  +, Conservation concern  +
Arctostaphylos pungens +
Illustrated  +
Arctostaphylos purissima +
Endemic  +, Conservation concern  +
Arctostaphylos rainbowensis +
Endemic  +, Conservation concern  +
Arctostaphylos refugioensis +
Endemic  +, Conservation concern  +
Arctostaphylos regismontana +
Endemic  +, Conservation concern  +
Arctostaphylos rudis +
Endemic  +, Conservation concern  +
Arctostaphylos silvicola +
Endemic  +, Conservation concern  +
Arctostaphylos stanfordiana +
Illustrated  +, Endemic  +
Arctostaphylos stanfordiana subsp. decumbens +
Endemic  +, Conservation concern  +
Arctostaphylos stanfordiana subsp. raichei +
Endemic  +, Conservation concern  +
Arctostaphylos stanfordiana subsp. stanfordiana +
Illustrated  +, Endemic  +
Arctostaphylos tomentosa +
Endemic  +
Arctostaphylos tomentosa subsp. bracteosa +
Endemic  +, Conservation concern  +
Arctostaphylos tomentosa subsp. daciticola +
Endemic  +, Conservation concern  +
Arctostaphylos tomentosa subsp. hebeclada +
Endemic  +
Arctostaphylos tomentosa subsp. tomentosa +
Endemic  +
Arctostaphylos uva-ursi +
Illustrated  +
Arctostaphylos virgata +
Endemic  +, Conservation concern  +
Arctostaphylos viridissima +
Endemic  +, Conservation concern  +
Arctostaphylos viscida +
Illustrated  +, Endemic  +
Arctostaphylos viscida subsp. mariposa +
Endemic  +
Arctostaphylos viscida subsp. pulchella +
Endemic  +
Arctostaphylos viscida subsp. viscida +
Illustrated  +, Endemic  +
Arctotheca calendula +
Weedy  +, Introduced  +, Illustrated  +
Arctotis fastuosa +
Introduced  +
Arctotis stoechadifolia +
Introduced  +, Illustrated  +
Ardisia crenata +
Introduced  +, Illustrated  +
Ardisia elliptica +
Weedy  +, Introduced  +
Ardisia escallonioides +
Weedy  +, Introduced  +
Arenaria benthamii +
Illustrated  +
Arenaria lanuginosa +
Illustrated  +
Arenaria lanuginosa var. lanuginosa +
Illustrated  +
Arenaria lanuginosa var. saxosa +
Illustrated  +
Arenaria livermorensis +
Endemic  +, Conservation concern  +
Arenaria paludicola +
Conservation concern  +
Arenaria serpyllifolia +
Weedy  +, Introduced  +
Arenaria serpyllifolia var. serpyllifolia +
Weedy  +, Introduced  +
Arenaria serpyllifolia var. tenuior +
Weedy  +, Introduced  +
Arethusa bulbosa +
Illustrated  +, Endemic  +
Argemone albiflora +
W2  +, Endemic  +
Argemone albiflora subsp. albiflora +
Endemic  +
Argemone albiflora subsp. texana +
Endemic  +
Argemone arizonica +
Conservation concern  +, Endemic  +, Illustrated  +
Argemone aurantiaca +
Endemic  +
Argemone corymbosa +
Endemic  +
Argemone corymbosa subsp. arenicola +
Endemic  +
Argemone corymbosa subsp. corymbosa +
Endemic  +
Argemone hispida +
Endemic  +, Illustrated  +
Argemone mexicana +
W2  +, Illustrated  +
Argemone munita +
Illustrated  +
Argemone munita subsp. argentea +
Endemic  +
Argemone munita subsp. munita +
Illustrated  +
Argemone munita subsp. robusta +
Endemic  +, Conservation concern  +
Argemone munita subsp. rotundata +
Illustrated  +, Endemic  +
Argemone ochroleuca +
Illustrated  +, Introduced  +
Argemone pleiacantha +
Illustrated  +
Argemone pleiacantha subsp. ambigua +
Endemic  +
Argemone pleiacantha subsp. pinnatisecta +
Conservation concern  +, Endemic  +, Illustrated  +
Argemone pleiacantha subsp. pleiacantha +
Illustrated  +
Argemone polyanthemos +
W2  +, Endemic  +, Illustrated  +
Argemone squarrosa +
W2  +, Illustrated  +, Endemic  +
Argemone squarrosa subsp. glabrata +
Endemic  +
Argemone squarrosa subsp. squarrosa +
Endemic  +, Illustrated  +
Argyranthemum foeniculaceum +
Introduced  +, Illustrated  +
Argyrochosma dealbata +
Endemic  +
Argyrochosma fendleri +
Illustrated  +
Argyrochosma jonesii +
Illustrated  +
Argythamnia adenophora +
Illustrated  +
Argythamnia aphoroides +
Endemic  +, Conservation concern  +
Argythamnia argyraea +
Endemic  +, Conservation concern  +
Argythamnia claryana +
Endemic  +
Argythamnia cyanophylla +
Illustrated  +, Endemic  +
Argythamnia humilis +
Illustrated  +
Argythamnia mercurialina +
Endemic  +
Argythamnia mercurialina var. mercurialina +
Endemic  +
Argythamnia mercurialina var. pilosissima +
Endemic  +
Arida arizonica +
Illustrated  +
Ariocarpus fissuratus +
Illustrated  +
Ariocarpus fissuratus var. fissuratus +
Illustrated  +
Arisaema dracontium +
Illustrated  +
Arisaema triphyllum +
Illustrated  +, Endemic  +
Aristida basiramea +
Endemic  +
Aristida condensata +
Endemic  +
Aristida desmantha +
Endemic  +
Aristida dichotoma +
Endemic  +
Aristida dichotoma var. curtissii +
Endemic  +
Aristida dichotoma var. dichotoma +
Endemic  +
Aristida gyrans +
Endemic  +
Aristida lanosa +
Endemic  +
Aristida longespica +
Endemic  +
Aristida longespica var. geniculata +
Endemic  +
Aristida longespica var. longespica +
Endemic  +
Aristida palustris +
Endemic  +
Aristida patula +
Endemic  +
Aristida purpurascens var. virgata +
Endemic  +
Aristida ramosissima +
Endemic  +
Aristida rhizomophora +
Endemic  +
Aristida simpliciflora +
Endemic  +
Aristida stricta +
Endemic  +
Aristida tuberculosa +
Endemic  +
Aristocapsa insignis +
Illustrated  +, Endemic  +, Conservation concern  +
Aristolochia californica +
Endemic  +
Aristolochia clematitis +
Introduced  +
Aristolochia erecta +
Illustrated  +
Aristolochia macrophylla +
Endemic  +, Illustrated  +
Aristolochia maxima +
Introduced  +
Aristolochia pentandra +
Endemic  +
Aristolochia reticulata +
Endemic  +, Illustrated  +
Aristolochia serpentaria +
Endemic  +
Aristolochia tomentosa +
Endemic  +
Armeria maritima +
Illustrated  +
Armeria maritima subsp. californica +
Illustrated  +, Endemic  +
Armeria maritima subsp. interior +
Endemic  +
Armeria maritima subsp. maritima +
Illustrated  +
Armeria maritima subsp. sibirica +
Endemic  +
Armoracia rusticana +
Weedy  +, Introduced  +, Illustrated  +
Arnica acaulis +
Endemic  +
Arnica angustifolia subsp. tomentosa +
Endemic  +
Arnica cernua +
Endemic  +
Arnica chamissonis +
Endemic  +
Arnica cordifolia +
Illustrated  +, Endemic  +
Arnica dealbata +
Endemic  +
Arnica discoidea +
Endemic  +
Arnica fulgens +
Endemic  +
Arnica gracilis +
Endemic  +
Arnica lanceolata +
Endemic  +
Arnica lanceolata subsp. lanceolata +
Endemic  +
Arnica lanceolata subsp. prima +
Endemic  +
Arnica latifolia +
Illustrated  +, Endemic  +
Arnica lonchophylla +
Endemic  +