Difference between revisions of "Dodecahema leptoceras"
Phytologia 66: 87. 1989.
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|name=Centrostegia leptoceras | |name=Centrostegia leptoceras | ||
|authority=A. Gray | |authority=A. Gray | ||
| + | |rank=species | ||
|publication_title=Proc. Amer. Acad. Arts | |publication_title=Proc. Amer. Acad. Arts | ||
|publication_place=8: 192. 1870 | |publication_place=8: 192. 1870 | ||
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|name=Chorizanthe leptoceras | |name=Chorizanthe leptoceras | ||
|authority=(A. Gray) S. Watson | |authority=(A. Gray) S. Watson | ||
| + | |rank=species | ||
}} | }} | ||
|hierarchy=Polygonaceae;Polygonaceae subfam. Eriogonoideae;Dodecahema;Dodecahema leptoceras | |hierarchy=Polygonaceae;Polygonaceae subfam. Eriogonoideae;Dodecahema;Dodecahema leptoceras | ||
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-->{{#Taxon: | -->{{#Taxon: | ||
name=Dodecahema leptoceras | name=Dodecahema leptoceras | ||
| − | |||
|authority=(A. Gray) Reveal & Hardham | |authority=(A. Gray) Reveal & Hardham | ||
|rank=species | |rank=species | ||
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|publication year=1989 | |publication year=1989 | ||
|special status= | |special status= | ||
| − | |source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/ | + | |source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/f50eec43f223ca0e34566be0b046453a0960e173/coarse_grained_fna_xml/V5/V5_996.xml |
|subfamily=Polygonaceae subfam. Eriogonoideae | |subfamily=Polygonaceae subfam. Eriogonoideae | ||
|genus=Dodecahema | |genus=Dodecahema | ||
Revision as of 21:58, 16 December 2019
Illustrator:
Copyright:
Plants 0.3–0.8(–1) × 0.2–0.8 dm. Leaf blades (1–)1.5–4(–6) × 0.2–0.4(–0.7) cm. Peduncles 0.5–1 mm. Flowers: perianth 1.2–1.8(–2) mm; filaments 0.6–1 mm; anthers 0.4–0.5 mm. Achenes 1.7–2 mm. 2n = ca. 34.
Phenology: Flowering May–Jun.
Habitat: Sandy to gravelly flats and slopes, chaparral communities, pine-oak woodlands
Elevation: 200-700 m
Discussion
Of conservation concern.
Dodecahema leptoceras is known only from the foothills of the San Gabriel Mountains of Los Angeles County, the San Bernardino Mountains of San Bernardino County, and the San Jacinto Mountains of western Riverside County. The urbanization of the greater Los Angeles area has significantly reduced the number of known northern populations. Slender-horned spinyherb is federally listed as endangered.
Dodecahema leptoceras is in the Center for Plant Conservation’s National Collection of Endangered Plants.
Selected References
None.