Difference between revisions of "Eriogonum umbellatum var. polyanthum"
Contr. W. Bot. 11: 5. 1903.
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|common_names=American River sulphur flower | |common_names=American River sulphur flower | ||
| − | |basionyms={{Treatment/ID/ | + | |special_status={{Treatment/ID/Special_status |
| + | |code=E | ||
| + | |label=Endemic | ||
| + | }} | ||
| + | |basionyms={{Treatment/ID/Basionym | ||
|name=Eriogonum polyanthum | |name=Eriogonum polyanthum | ||
|authority=Bentham | |authority=Bentham | ||
| + | |rank=species | ||
| + | |publication_title=in A. P. de Candolle and A. L. P. P. de Candolle, Prodr. | ||
| + | |publication_place=14: 12. 1856 | ||
}} | }} | ||
|synonyms={{Treatment/ID/Synonym | |synonyms={{Treatment/ID/Synonym | ||
|name=Eriogonum umbellatum subsp. polyanthum | |name=Eriogonum umbellatum subsp. polyanthum | ||
|authority=(Bentham) S. Stokes | |authority=(Bentham) S. Stokes | ||
| + | |rank=subspecies | ||
}} | }} | ||
|hierarchy=Polygonaceae;Polygonaceae subfam. Eriogonoideae;Eriogonum;Eriogonum subg. Oligogonum;Eriogonum umbellatum;Eriogonum umbellatum var. polyanthum | |hierarchy=Polygonaceae;Polygonaceae subfam. Eriogonoideae;Eriogonum;Eriogonum subg. Oligogonum;Eriogonum umbellatum;Eriogonum umbellatum var. polyanthum | ||
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name=Eriogonum umbellatum var. polyanthum | name=Eriogonum umbellatum var. polyanthum | ||
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|authority=(Bentham) M. E. Jones | |authority=(Bentham) M. E. Jones | ||
|rank=variety | |rank=variety | ||
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|publication title=Contr. W. Bot. | |publication title=Contr. W. Bot. | ||
|publication year=1903 | |publication year=1903 | ||
| − | |special status= | + | |special status=Endemic |
| − | |source xml=https:// | + | |source xml=https://bitbucket.org/aafc-mbb/fna-data-curation/src/2e0870ddd59836b60bcf96646a41e87ea5a5943a/coarse_grained_fna_xml/V5/V5_709.xml |
|subfamily=Polygonaceae subfam. Eriogonoideae | |subfamily=Polygonaceae subfam. Eriogonoideae | ||
|genus=Eriogonum | |genus=Eriogonum | ||
Latest revision as of 23:13, 5 November 2020
Shrubs, round, rather open, 4–10 × 5–10 dm. Aerial flowering stems erect, 1–2 dm, floccose, without one or more leaflike bracts ca. midlength. Leaves in rather open, terminal rosettes; blade oblanceolate to narrowly elliptic, 1–3 × 0.3–1(–1.3) cm, densely white-tomentose abaxially, thinly floccose or glabrous and light green adaxially, margins plane. Inflorescences umbellate or compound-umbellate, branched 1–2(–3) times; branches thinly floccose or glabrous, occasionally central branch seemingly with a whorl of bracts ca. midlength; involucral tubes 2.5–4 mm, floccose, lobes 2–3.5 mm. Flowers 4–7 mm; perianth bright yellow.
Phenology: Flowering Jun–Sep.
Habitat: Serpentine flats and slopes, oak and montane conifer woodlands
Elevation: 800-1500 m
Discussion
The inflorescences of var. polyanthum are commonly compound-umbellate, but plants with reduced yet bracteated inflorescences do occur. Those with a reduced inflorescence technically consist of a long (6–10 cm), central, bractless peduncle and two lateral branches (3–4 cm), with each of the latter bearing a peduncle (3–6 cm). Such branches seem to have a whorl of leaflike bracts, but actually the bracts are positioned between the branch and involucres (technically at the base of the peduncle) and thus are like other members of the genus.
The name var. polyanthum has been misapplied in California to plants here attributed to var. modocense and var. dumosum.
Selected References
None.