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disciform), usually in corymbiform, paniculiform, racemiform, or spiciform arrays, sometimes borne singly or in subcapitate clusters. Calyculi 0. Phyllaries

Heads disciform, borne singly or (2–60+) in usually corymbiform, rarely paniculiform, arrays or in subcapitate clusters. Involucres hemispheric to campanulate

on adaxial face of each branch in 2 separate or contiguous lines or in 1 continuous band (styles usually not branched in functionally staminate florets)

stenophylla is a xerophyte in the Argenteae group. It is distinguished by relatively narrow leaves, heads in subcapitate clusters, and light brown, dingy

internodal bands; branches strongly ascending, terminating in compact, capitate or subcapitate flower clusters, axis 0–2.5 mm. Flowers: pedicel 0.8–2.5 mm; bracts

species in the flora). In addition to the species treated here, Illecebrum verticillatum Linnaeus was collected in 1912 as a weed in a plant nursery in Reading

Pterogonum), synoecious (sometimes polygamodioecious in subg. Micrantha and Oligogonum, rarely dioecious in subg. Oligogonum); taproot slender to stout, solid

compound-umbellate, usually open and spreading, occasionally reduced and subcapitate to capitate; branches absent or round and smooth, tomentose to floccose

without glutinous bands on internodes. Leaves petiolate, pairs unequal in size in each pair; blade thin or thick and slightly fleshy, base symmetric to

Flowers usually bisexual, (protandrous in Chamaenerion, Clarkia, Epilobium, [and most species of Lopezia]; protogynous in Circaea and Fuchsia), sometimes unisexual

eglandular. Heads discoid, borne singly, terminal and in distal axils, or in racemiform, spiciform, subcapitate, paniculiform, or corymbiform arrays. (Peduncles

sometimes dense, congested, or compact, sometimes reduced and in subumbellate, subcapitate, or capitate heads or reduced to a single terminal involucre;

(1983b) in not recognizing the infraspecific taxa that Chaudhri proposed for North American taxa. We follow L. H. Shinners (1962c) and Chaudhri in including

also Baad), an uncommon base number in Arenaria in the narrow sense. The decision to recognize Eremogone, as used in W. A. Weber and R. C. Wittmann (1992)

reflexed separately (rather than in pairs), which occur mainly in the Great Basin. Of the remaining species of Camissonia in the flora area, several (C. benitensis

centers of concentration in southern Africa and Australia, in both Old World and New World, the greater numbers of genera and species in the southern hemisphere

may elongate; both alternatives in the key should be considered. Inflorescence descriptions in the key are for plants in full flower; staminal column measurements

Show Lower Taxa Cardionema ramosissimum de Candolle in A. P. de Candolle and A. L. P. P. de Candolle in A. P. de Candolle and A. L. P. P. de Candolle, Prodr

families. Juncaceae also have pollen in tetrads, but in that family all four microspores produce pollen grains. Some species in some genera of Cyperaceae (particularly

sometimes subsessile. Inflorescences erect or somewhat ascending, dense, subcapitate or spicate especially when young to elongated and open, calyces overlapping

blades 1 or 2, thickly V-shaped in cross-section, to equaling sheath length. Inflorescences 1–2 timesbranched or subcapitate or of 1 spikelet, branches to

erect, borne singly or often densely crowded in spiciform, racemiform, or subcapitate arrays, especially in acaulescent or short-caulescent plants, often

Eriogonum lachnogynum var. sarahiae Torrey ex Bentham in A. P. de Candolle and A. L. P. P. de Candolle in A. P. de Candolle and A. L. P. P. de Candolle, Prodr

spiciform, sometimes subcapitate, congested in bud, dense, calyces sometimes conspicuously overlapping in flower and sometimes in fruit, to open and elongate

glabrous. Generated Map Legacy Map Calif., nw Mexico Varieties 4 (3 in the flora). In the flora area, Eriogonum grande is the insular phase of the E. nudum

times in Guatemala and twice in Missouri, although it is not clearly established in either region. It usually grows below 200 m elevation, but in Guatemala

Inflorescences subcapitate, umbellate-cymose, or cymose, open and divided 1–3 times; branches 2–20 × 2–20 cm. Involucres 2–5 per cluster, (2–) 3–4 mm. Flowers

white-lanate on both surfaces, margins plane. Inflorescences capitate, subcapitate, or cymose-umbellate, 1–5 × 1–2 cm; branches absent or dichotomous; bracts

densely clustered at tip of main-stem and branches in subcapitate to racemiform arrays, often also in distal leaf-axils, closely subtended by clusters of unlobed

sprawling flowering stems with large clusters of involucres and flowers are distinctive. The species is occasionally encountered in cultivation as a rock-garden

arachnoid-tomentose. Heads 3–many, evidently pedunculate, in corymbiform or subcapitate arrays at stem tips (in age clustered axillary heads sometimes developing), subtended

1–many, erect, terminal on branches in subcapitate to congested, corymbiform arrays, closely subtended by clustered, ± leafy bracts. Peduncles 0–7 cm. Involucres

known only from a few scattered locations in the Klamath Mountains of Siskiyou County and just over the boundary in Del Norte County. It is considered to be

sparsely so and greenish adaxially, margins crenulate. Inflorescences subcapitate to cymose, 1–7 × 1–5 cm; branches dichotomous, glabrous; bracts 3, scalelike

Heads 1–many, ± erect, usually crowded in subcapitate to tight corymbiform arrays, closely subtended by clustered ± leafy bracts. Peduncles 0–1 (–30) cm

accommodated by the other, more tightly circumscribed varieties. Population clusters occur in three discrete areas: the Sierra Nevada of eastern California and adjacent

2–many, subsessile or short-pedunculate, in ± congested corymbiform to subcapitate arrays at stem tips (in age clustered axillary heads often developing), subtended

Inflorescences erect, spiciform or subcapitate, dense, calyces usually conspicuously overlapping in flower and sometimes in fruit, branched, ca. 10-flowered