Eriogonum cithariforme |
Eriogonum cithariforme var. agninum |
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Cithara buckwheat, Cithara wild buckwheat |
Cithara buckwheat, Santa Ynez wild buckwheat |
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Habit | Herbs, spreading to erect, 2–3(–5) dm, glabrous or tomentose, greenish or reddish. | |||||
Stems | aerial flowering stems erect, 0.5–1 dm, glabrous or tomentose. |
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Flowering stems | and inflorescence branches glabrous. |
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Leaves | basal and sometimes cauline; basal: petiole 1–5 cm, tomentose to floccose, often slightly winged, blade oblanceolate or elliptic to ovate or nearly rounded, 1–2 × 0.5–1.5(–2) cm, tomentose abaxially, floccose to glabrate and grayish to greenish adaxially; cauline: petiole 0.5–2 cm, floccose, blade elliptic, 0.3–1 cm × 0.2–0.7 cm, similar to basal blade. |
petiole not winged; basal blade elliptic to ovate or nearly rounded. |
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Inflorescences | cymose, distally uniparous due to suppression of secondary branches, open, 5–25 × 5–25 cm; branches usually inwardly curved, glabrous or tomentose; bracts 0.5–2.5 × 0.5–2 mm. |
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Peduncles | absent. |
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Involucres | somewhat appressed to branches, turbinate, 2.5–3 × 1.5–2 mm, glabrous; teeth 5, erect, 0.2–0.4 mm. |
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Flowers | 1.5–2 mm; perianth white to rose, glabrous; tepals monomorphic, oblong-obovate; stamens included, 1–1.5 mm; filaments pilose proximally. |
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Achenes | brown, 3-gonous, 1–1.5 mm. |
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Eriogonum cithariforme |
Eriogonum cithariforme var. agninum |
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Phenology | Flowering May–Oct. | |||||
Habitat | Sandy flats and slopes, chaparral communities, oak and montane conifer woodlands | |||||
Elevation | 500-1800(-2100) m (1600-5900(-6900) ft) | |||||
Distribution |
CA
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CA |
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Discussion | Varieties 2 (2 in the flora). The graceful, upwardly curved branch segments of Eriogonum cithariforme generally are distinctive in older plants, although an occasional individual of E. davidsonii may have this feature. A distinction between E. cithariforme and E. roseum also is troublesome, as in young material the curved branch segments are not always obvious. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Variety agninum is known primarily from the mountains of Santa Barbara and Ventura counties. A single collection (Davidson 1617, NY) found along Big Rock Creek in Los Angeles County in 1900, and the type of subsp. polygonoides, gathered in San Luis Obispo County, are from disjunct populations. This variety is sometimes difficult to differentiate from E. davidsonii. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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Key |
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Source | FNA vol. 5, p. 424. | FNA vol. 5, p. 424. | ||||
Parent taxa | Polygonaceae > subfam. Eriogonoideae > Eriogonum > subg. Oregonium | Polygonaceae > subfam. Eriogonoideae > Eriogonum > subg. Oregonium > Eriogonum cithariforme | ||||
Sibling taxa | ||||||
Subordinate taxa | ||||||
Synonyms | E. gracile var. cithariforme, E. vimineum var. cithariforme | E. agninum, E. gracile var. polygonoides, E. vimineum var. agninum, E. vimineum subsp. polygonoides | ||||
Name authority | S. Watson: Proc. Amer. Acad. Arts 23: 266. (1888) | (Greene) Reveal: Aliso 7: 223. (1970) | ||||
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