Difference between revisions of "Eriogonum twisselmannii"
in P. A. Munz, Suppl. Calif. Fl. 40. 1968.
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|accepted_name=Eriogonum twisselmannii | |accepted_name=Eriogonum twisselmannii | ||
| − | |accepted_authority=(J. T. Howell) Reveal | + | |accepted_authority=(J. T. Howell) Reveal |
|publications={{Treatment/Publication | |publications={{Treatment/Publication | ||
|title=in P. A. Munz, Suppl. Calif. Fl. | |title=in P. A. Munz, Suppl. Calif. Fl. | ||
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}} | }} | ||
|common_names=Twisselmann’s wild buckwheat | |common_names=Twisselmann’s wild buckwheat | ||
| + | |special_status={{Treatment/ID/Special_status | ||
| + | |code=E | ||
| + | |label=Endemic | ||
| + | }}{{Treatment/ID/Special_status | ||
| + | |code=C | ||
| + | |label=Conservation concern | ||
| + | }} | ||
|basionyms={{Treatment/ID/Basionym | |basionyms={{Treatment/ID/Basionym | ||
|name=Eriogonum douglasii var. twisselmannii | |name=Eriogonum douglasii var. twisselmannii | ||
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-->{{#Taxon: | -->{{#Taxon: | ||
name=Eriogonum twisselmannii | name=Eriogonum twisselmannii | ||
| − | |authority=(J. T. Howell) Reveal | + | |authority=(J. T. Howell) Reveal |
|rank=species | |rank=species | ||
|parent rank=subgenus | |parent rank=subgenus | ||
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|publication title=in P. A. Munz, Suppl. Calif. Fl. | |publication title=in P. A. Munz, Suppl. Calif. Fl. | ||
|publication year=1968 | |publication year=1968 | ||
| − | |special status= | + | |special status=Endemic;Conservation concern |
| − | |source xml=https:// | + | |source xml=https://bitbucket.org/aafc-mbb/fna-data-curation/src/2e0870ddd59836b60bcf96646a41e87ea5a5943a/coarse_grained_fna_xml/V5/V5_745.xml |
|subfamily=Polygonaceae subfam. Eriogonoideae | |subfamily=Polygonaceae subfam. Eriogonoideae | ||
|genus=Eriogonum | |genus=Eriogonum | ||
Latest revision as of 22:13, 5 November 2020
Herbs, matted, occasionally polygamodioecious, (0.2–)0.5–1.5 × 3–4 dm, tomentose. Stems: caudex spreading; aerial flowering stems erect or nearly so, slender, solid, not fistulose, arising at nodes of caudex branches and at distal nodes of short, nonflowering aerial branches, (0.2–)0.5–1.2 dm, tomentose, with a whorl of 4–8 leaflike bracts ca. midlength, similar to leaf blades, 0.4–0.8 × 0.1–0.3 cm. Leaves in loose to congested basal rosettes; petiole 0.2–0.4 cm, thinly tomentose; blade oblanceolate to elliptic, 0.5–1 × (0.2–)0.4–0.6 cm, white- or grayish-tomentose abaxially, thinly tomentose to nearly glabrous and dull green adaxially. Inflorescences capitate, 0.7–1.5 cm wide; branches absent; bracts absent immediately below involucre. Involucres 1 per node, campanulate, (2.5–)4–5 × 4–6 mm; teeth 6–9, lobelike, strongly reflexed, (2–)3–5 mm. Flowers (4–)5–6 mm, including 1–1.3 mm stipelike base; perianth pale yellow, villous abaxially; tepals slightly dimorphic, those of outer whorl obtuse, 3–5 × 3–3.5 mm, those of inner whorl broadly oblanceolate, 5–6 × 2.5–3 mm; stamens exserted, 4–5 mm; filaments pilose proximally. Achenes light brown, 5–5.5 mm, glabrous except for sparsely pubescent beak.
Phenology: Flowering Jun–Sep.
Habitat: Rocky outcrops, montane conifer woodlands
Elevation: 2300-2600 m
Discussion
Of conservation concern.
Eriogonum twisselmannii is a rare species of the southern Sierra Nevada and is known only from Slate Mountain and The Needles in Tulare County. It is worthy of being on a “watch” list of rare plants in California, but because of its remote location, it is not threatened.
Selected References
None.