Difference between revisions of "Eriogonum thornei"
Harvard Pap. Bot. 3: 51. 1998.
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|name=Eriogonum ericifolium var. thornei | |name=Eriogonum ericifolium var. thornei | ||
|authority=Reveal & Henrickson | |authority=Reveal & Henrickson | ||
| + | |rank=variety | ||
|publication_title=Madroño | |publication_title=Madroño | ||
|publication_place=23: 205, fig. 1. 1975 | |publication_place=23: 205, fig. 1. 1975 | ||
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|name=Eriogonum ericifolium subsp. thornei | |name=Eriogonum ericifolium subsp. thornei | ||
|authority=(Reveal & Henrickson) Thorne | |authority=(Reveal & Henrickson) Thorne | ||
| + | |rank=subspecies | ||
}} | }} | ||
|hierarchy=Polygonaceae;Polygonaceae subfam. Eriogonoideae;Eriogonum;Eriogonum subg. Eucycla;Eriogonum thornei | |hierarchy=Polygonaceae;Polygonaceae subfam. Eriogonoideae;Eriogonum;Eriogonum subg. Eucycla;Eriogonum thornei | ||
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-->{{#Taxon: | -->{{#Taxon: | ||
name=Eriogonum thornei | name=Eriogonum thornei | ||
| − | |||
|authority=(Reveal & Henrickson) L. M. Shultz | |authority=(Reveal & Henrickson) L. M. Shultz | ||
|rank=species | |rank=species | ||
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|publication year=1998 | |publication year=1998 | ||
|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_476.xml |
|subfamily=Polygonaceae subfam. Eriogonoideae | |subfamily=Polygonaceae subfam. Eriogonoideae | ||
|genus=Eriogonum | |genus=Eriogonum | ||
Revision as of 21:54, 16 December 2019
Subshrubs, spreading and matted, not scapose, 0.4–0.8 × 0.4–1(–2.5) dm. Stems spreading, with persistent leaf bases, up to 1/4 height of plant; caudex stems compact; aerial flowering stems spreading, slender, solid, not fistulose, 0.1–0.2 dm, floccose to slightly tomentose. Leaves cauline, 1 per node or fasciculate; petiole 0.01–0.02 cm, tomentose; blade linear, 0.4–0.6 × 0.05–0.1 cm, densely white-tomentose adaxially, finely villous and green adaxially, margins revolute. Inflorescences umbellate-cymose, compact, 0.5–1 × 0.5–1 cm; branches usually dichotomous, otherwise with secondaries suppressed, glabrous or nearly so; bracts 3, scalelike, linear, 0.5–1 mm. Peduncles absent. Involucres 1 per node, turbinate, 1.5–2 × 1–1.5 mm, floccose; teeth 5, erect, 0.4–0.6 mm. Flowers 1.5–2 mm; perianth white, glabrous; tepals connate proximal 1/4, dimorphic, those of outer whorl obovate, 1–1.5 mm wide, those of inner whorl oblanceolate, 0.8–1 mm wide, connate proximally; stamens slightly exserted, 2–3 mm; filaments pilose proximally. Achenes light brown, 2–2.5 mm, glabrous except for papillate beak.
Phenology: Flowering May–Jul.
Habitat: Copper-rich quartzite gravel on ridges, pinyon woodlands
Elevation: 1800 m
Discussion
Eriogonum thornei is known from a single canyon area in the New York Mountains, San Bernardino County. Shultz elevated Thorne’s wild buckwheat to species status when she proposed E. phoeniceum, here considered a variety of E. microthecum. Eriogonum thornei and E. ericifolium are weakly differentiated, with minimal morphologic differences, and yet they occur on different substrates and are well-removed biogeographically from each other. Thorne’s wild buckwheat is a protected plant in California.
Selected References
None.