View source for Yucca rostrata

{{Treatment/ID
|accepted_name=Yucca rostrata
|accepted_authority=Engelmann ex Trelease
|publications={{Treatment/Publication
|title=Rep. (Annual) Missouri Bot. Gard.
|place=13: 68, plates 40–42, plate 84, fig. 3, plate 93, fig. 2. 1902
|year=1902
}}
|common_names=Beaked yucca
|basionyms=
|synonyms={{Treatment/ID/Synonym
|name=Yucca rostrata var. linearis
|authority=Trelease
|rank=variety
}}
|hierarchy=Agavaceae;Yucca;Yucca rostrata
|hierarchy_nav=<div class="higher-taxa"><div class="higher-taxon"><small>family</small>[[Agavaceae]]</div><div class="higher-taxon"><small>genus</small>[[Yucca]]</div><div class="higher-taxon"><small>species</small>[[Yucca rostrata]]</div></div>
|volume=Volume 26
|mention_page=page 425, 431
|treatment_page=page 430
}}<!--

--><span class="statement" id="st-d0_s0" data-properties="whole_organism architecture or arrangement or growth form;whole_organism architecture or arrangement or growth form;whole_organism architecture;whole_organism some measurement;whole_organism diameter;whole_organism growth form"><b>Plants </b>solitary or forming colonies of rosettes, caulescent, arborescent, 2.5–3.6 m, not including inflorescence, 1.8–3.2 dm diam;</span> <span class="statement" id="st-d0_s1" data-properties="leaf quantity">rosettes each with more than 100 leaves.</span> <span class="statement" id="st-d0_s2" data-properties="stem quantity;stem orientation;stem architecture;stem architecture"><b>Stems </b>1–several, erect, mostly simple, occasionally 1–3-branched.</span> <span class="statement" id="st-d0_s3" data-properties="leaf-blade arrangement or course or shape;leaf-blade architecture;leaf-blade shape;leaf-blade width;leaf-blade length;leaf-blade pubescence;leaf-blade architecture or pubescence or relief;middle width;margin shape;margin coloration;margin coloration;apex architecture or shape;apex architecture or shape"><b>Leaf-</b>blade linear, often twisted, flat to concavo-convex, widest considerably beyond middle, 25–60 × 1.2–1.7 cm, glaucous, smooth, margins minutely denticulate, lemon yellow, hyaline, apex spinose, spine-tipped.</span> <span class="statement" id="st-d0_s4" data-properties="inflorescence arrangement;inflorescence orientation;inflorescence orientation;inflorescence shape;inflorescence some measurement"><b>Inflorescences </b>paniculate, arising just within or beyond rosettes, ovoid, 3–10 dm;</span> <span class="statement" id="st-d0_s5" data-properties="branch some measurement">branches up to 3.8 dm;</span> <span class="statement" id="st-d0_s6" data-properties="bract orientation">bracts erect;</span> <span class="statement" id="st-d0_s7" data-properties="peduncle architecture or shape;peduncle some measurement;peduncle diameter;peduncle pubescence;peduncle pubescence">peduncle sometimes scapelike, 0.3–1 m, less than 2.5 cm diam., glabrous or glabrescent.</span> <span class="statement" id="st-d0_s8" data-properties="flower orientation"><b>Flowers </b>pendent;</span> <span class="statement" id="st-d0_s9" data-properties="perianth shape">perianth globose to campanulate;</span> <span class="statement" id="st-d0_s10" data-properties="tepal fusion;tepal coloration;tepal shape;tepal length;tepal width;apex shape">tepals distinct, white, narrowly ovate, 4.2–5.2 × 1.1–2 cm, apex sharply acuminate;</span> <span class="statement" id="st-d0_s11" data-properties="filament some measurement">filaments 1.7–2 cm;</span> <span class="statement" id="st-d0_s12" data-properties="pistil some measurement">pistil 2.5–3.5 cm;</span> <span class="statement" id="st-d0_s13" data-properties="style coloration;style some measurement">style white, 6–14 mm;</span> <span class="statement" id="st-d0_s14" data-properties="stigma shape">stigmas lobed.</span> <span class="statement" id="st-d0_s15" data-properties="fruit orientation;fruit architecture;fruit dehiscence;fruit shape;fruit size;fruit dehiscence;fruit dehiscence;fruit dehiscence"><b>Fruits </b>erect, capsular, dehiscent, ovoid to ellipsoid, rarely constricted, 4–7 × 1.8–2.5 cm, dehiscence septicidal.</span><!--

-->{{Treatment/Body
|phenology=Flowering spring.
|habitat=Rocky mountain slopes, canyon bottoms
|elevation=700 m
|distribution=Tex.;n Mexico (Coahuila)
|discussion=<p>In the United States, Yucca rostrata is restricted to Brewster County, Texas. It is closely related to Y. thompsoniana (K. H. Clary 1997), which is perhaps just a northern variant of this species.</p>
|tables=
|references=
}}<!--

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-->{{#Taxon:
name=Yucca rostrata
|authority=Engelmann ex Trelease
|rank=species
|parent rank=genus
|synonyms=Yucca rostrata var. linearis
|basionyms=
|family=Agavaceae
|phenology=Flowering spring.
|habitat=Rocky mountain slopes, canyon bottoms
|elevation=700 m
|distribution=Tex.;n Mexico (Coahuila)
|reference=None
|publication title=Rep. (Annual) Missouri Bot. Gard.
|publication year=1902
|special status=
|source xml=https://bibilujan@bitbucket.org/aafc-mbb/fna-fine-grained-xml.git/src/84153f6d59a0a91d69695978a64cee7560374f8e/V26/V26_883.xml
|genus=Yucca
|species=Yucca rostrata
|apex architecture or shape=spine-tipped;spinose
|apex shape=acuminate
|bract orientation=erect
|branch some measurement=0dm;3.8dm
|filament some measurement=1.7cm;2cm
|flower orientation=pendent
|fruit architecture=capsular
|fruit dehiscence=septicidal;1.8cm;2.5cm
|fruit orientation=erect
|fruit shape=ovoid;ellipsoid
|fruit size=constricted
|inflorescence arrangement=paniculate
|inflorescence orientation=beyond rosettes;arising
|inflorescence shape=ovoid
|inflorescence some measurement=3dm;10dm
|leaf-blade architecture=twisted
|leaf-blade architecture or pubescence or relief=smooth
|leaf-blade arrangement or course or shape=linear
|leaf-blade length=25cm;60cm
|leaf-blade pubescence=glaucous
|leaf-blade shape=flat;concavo-convex
|leaf-blade width=widest
|margin coloration=hyaline;lemon yellow
|margin shape=denticulate
|middle width=1.2cm;1.7cm
|peduncle architecture or shape=scapelike
|peduncle diameter=0cm;2.5cm
|peduncle pubescence=glabrescent;glabrous
|peduncle some measurement=0.3m;1m
|perianth shape=globose;campanulate
|pistil some measurement=2.5cm;3.5cm
|stem architecture=1-3-branched;simple
|stem orientation=erect
|stem quantity=1;several
|stigma shape=lobed
|style coloration=white
|style some measurement=6mm;14mm
|tepal coloration=white
|tepal fusion=distinct
|tepal length=4.2cm;5.2cm
|tepal shape=ovate
|tepal width=1.1cm;2cm
|whole_organism architecture=caulescent
|whole_organism architecture or arrangement or growth form=forming colonies;solitary
|whole_organism diameter=1.8dm;3.2dm
|whole_organism growth form=plant
|whole_organism some measurement=2.5m;3.6m
}}<!--

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