Eriogonum cithariforme

S. Watson

Proc. Amer. Acad. Arts 23: 266. 1888.

Synonyms: Eriogonum gracile var. cithariforme (S. Watson) Munz Eriogonum vimineum var. cithariforme (S. Watson) S. Stokes
Treatment appears in FNA Volume 5. Treatment on page 424. Mentioned on page 415, 422.

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. 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. 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. Peduncles absent. Involucres somewhat appressed to branches, turbinate, 2.5–3 × 1.5–2 mm, glabrous; teeth 5, erect, 0.2–0.4 mm. Flowers 1.5–2 mm; perianth white to rose, glabrous; tepals monomorphic, oblong-obovate; stamens included, 1–1.5 mm; filaments pilose proximally. Achenes brown, 3-gonous, 1–1.5 mm.


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.

Selected References



1 Flowering stems and inflorescence branches tomentose Eriogonum cithariforme var. cithariforme
1 Flowering stems and inflorescence branches glabrous Eriogonum cithariforme var. agninum