Difference between revisions of "Yucca rostrata"
Rep. (Annual) Missouri Bot. Gard. 13: 68, plates 40–42, plate 84, fig. 3, plate 93, fig. 2. 1902.
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|name=Yucca rostrata var. linearis | |name=Yucca rostrata var. linearis | ||
|authority=Trelease | |authority=Trelease | ||
| + | |rank=variety | ||
}} | }} | ||
|hierarchy=Agavaceae;Yucca;Yucca rostrata | |hierarchy=Agavaceae;Yucca;Yucca rostrata | ||
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|elevation=700 m | |elevation=700 m | ||
|distribution=Tex.;n Mexico (Coahuila). | |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> | + | |discussion=<p>In the United States, <i>Yucca rostrata</i> is restricted to Brewster County, Texas. It is closely related to <i>Y. thompsoniana</i> (K. H. Clary 1997), which is perhaps just a northern variant of this species.</p> |
|tables= | |tables= | ||
|references= | |references= | ||
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-->{{#Taxon: | -->{{#Taxon: | ||
name=Yucca rostrata | name=Yucca rostrata | ||
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|authority=Engelmann ex Trelease | |authority=Engelmann ex Trelease | ||
|rank=species | |rank=species | ||
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|publication year=1902 | |publication year=1902 | ||
|special status= | |special status= | ||
| − | |source xml=https:// | + | |source xml=https://bitbucket.org/aafc-mbb/fna-data-curation/src/2e0870ddd59836b60bcf96646a41e87ea5a5943a/coarse_grained_fna_xml/V26/V26_883.xml |
|genus=Yucca | |genus=Yucca | ||
|species=Yucca rostrata | |species=Yucca rostrata | ||
Latest revision as of 22:18, 5 November 2020
Plants solitary or forming colonies of rosettes, caulescent, arborescent, 2.5–3.6 m, not including inflorescence, 1.8–3.2 dm diam; rosettes each with more than 100 leaves. Stems 1–several, erect, mostly simple, occasionally 1–3-branched. Leaf 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. Inflorescences paniculate, arising just within or beyond rosettes, ovoid, 3–10 dm; branches up to 3.8 dm; bracts erect; peduncle sometimes scapelike, 0.3–1 m, less than 2.5 cm diam., glabrous or glabrescent. Flowers pendent; perianth globose to campanulate; tepals distinct, white, narrowly ovate, 4.2–5.2 × 1.1–2 cm, apex sharply acuminate; filaments 1.7–2 cm; pistil 2.5–3.5 cm; style white, 6–14 mm; stigmas lobed. Fruits erect, capsular, dehiscent, ovoid to ellipsoid, rarely constricted, 4–7 × 1.8–2.5 cm, dehiscence septicidal.
Phenology: Flowering spring.
Habitat: Rocky mountain slopes, canyon bottoms
Elevation: 700 m
Distribution
Tex., n Mexico (Coahuila).
Discussion
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.
Selected References
None.