Plants herbs, typically prostrate, sprawling mats, 0.5–1.5 dm tall, 1–4 dm across; aerial flowering stems spreading to erect, 0.3–0.6 (1.5) dm long, thinly tomentose, without one or more foliaceous bracts about midlength; leaves typically in tight rosettes, the blades usually broadly elliptic, 0.5–1.5 (2.5) cm long, 0.5–1.2 (1.5) cm wide, tannish-tomentose abaxially, thinly tomentose or glabrous and olive green adaxially, the margins plane; inflorescences compact-umbellate, the branches 0.1–1.5 (2) cm long, thinly tomentose, without a whorl of bracts about midlength; involucral tubes 1.5–3.5 mm long, the lobes 1–4 mm long; flowers 2–6 mm long, the perianth bright yellow.
Author Archives: xochipelli2012
Eriogonum umbellatum var. glaberrimum
Plants herbs, compact mats, 1–2.5 (3) dm tall, 3–8 dm across; aerial flowering stems erect, 1–2 dm long, glabrous, without one or more foliaceous bracts about midlength; leaves in loose rosettes, the blades narrowly elliptic to elliptic, 1–2 cm long, 0.3–1 cm wide, glabrous and green on both surfaces, the margins plane; inflorescences umbellate, the branches 3–8 cm long, glabrous, with a whorl of bracts about midlength; involucral tubes 4–5 mm long, the lobes 1–3.5 (4) mm long; flowers 4–7 mm long, the perianth cream or whitish.
Eriogonum siskiyouense
Plants herbs, spreading, matted, 0.5–2 dm tall, 1–5 dm across, glabrate or glabrous; stems with caudex spreading, the aerial flowering stems erect, slender, solid, not fistulose, arising at nodes of caudex branches and at distal nodes of short, non-flowering aerial branches, 0.5–1.5 (2) dm long, usually glabrous, with a whorl of 2–4 foliaceous bracts about midlength, similar to leaf blade, 0.3–0.5 cm long, 0.1–0.2 cm wide; leaves in dense compact basal rosettes, the petioles 0.2–0.6 cm long, glabrate or glabrous, the blades spatulate to round, (0.3) 0.5–0.8 cm long, (0.2) 0.3–0.5 (0.7) cm wide, densely white to thinly tomentose abaxially, sparsely floccose to glabrate and green or olive green adaxially, rarely glabrous on both surfaces, the margins entire, plane; inflorescences capitate, rarely umbellate, 0.8–1.5 cm wide or 1–2 cm long, 1–3 cm wide, the branches usually glabrate, the bracts absent immediately below involucre; involucres 1 per node, turbinate-campanulate to campanulate, (3) 3.5–4 mm long, 4–6 mm wide, arachnoid-tomentose, the teeth 6–10, lobelike, reflexed, (2) 2.5–3.5 mm long; flowers (4) 4.5–6 mm long, including a 0.6–1 mm long stipelike base, the perianth sulphur yellow, glabrous, the tepals monomorphic, oblong, the stamens exserted, 3.5–5 mm long, the filaments pilose proximally; achenes light brown, 4.5–5 mm long, glabrous.
Eriogonum alpinum
Plants herbs, spreading, compact, 0.2–0.6 dm tall, (0.3) 0.4–1 dm across, tomentose; stems with caudex absent, the aerial flowering stems erect or nearly so, slender, solid, not fistulose, arising directly from a taproot, (0.3) 0.4–0.6 dm long, floccose, with a whorl of 3–5 foliaceous bracts mostly at midlength, 0.4–0.8 (1) cm long, 0.15–0.4 (0.7) cm wide; leaves basal, in well-defined rosettes, the petioles 1–2 (3) cm long, tomentose, the blades oval to round-oval, 1–2 (3) cm long and wide, densely whitish- or grayish-tomentose on both surfaces, the margins entire, plane; inflorescences capitate, 1–2 (2.5) cm wide, the branches absent, the bracts absent immediately below involucre; involucres 1 per node, broadly campanulate, 3–5 (6) mm long, 4–7 (10) mm wide, tomentose, the teeth 6–12, erect, 0.5–0.9 mm long; flowers (3) 4–8 mm long, including a 0.5–0.8 mm long stipelike base, the perianth bright yellow, glabrous, the tepals monomorphic, oblong-obovate, the stamens included to exserted, 3–6 mm long, the filaments pilose proximally; achenes light brown, 4–5 mm long, glabrous Continue reading
Eriogonum ovalifolium var. purpureum
Plants 2.5–4 dm wide; leaf blades spatulate, oblong, or obovate to oval, 0.5–2 cm long, tomentose to floccose, the margins rarely brownish; scapes erect, (4) 5–20 cm long, tomentose; inflorescences capitate, 1.5–3.5 cm wide, the branches absent; involucres 3–15 per cluster, 4–5 mm long; flowers 4–5 mm long, the perianth white to rose or purple. 2n = 40. Continue reading
Eriogonum ovalifolium var. eximium
Plants 1-3 dm across. Leaf-blades elliptic or spatulate to oval, (0.3-)0.5-1.5(-2) cm; margins brownish. Scapes erect, 1-5(-7.5) cm, tomentose. Inflorescences capitate, 1-2.5 cm across. Involucres 3-10, 4-5(-6.5) mm. Flowers white to cream, 4-5 mm.
Flowering summer (Jun-Sep). Granitic sandy or gravelly to rocky or even talus slopes in sagebrush communities, and in montane conifer woodlands; 1750-2450 m; Calif., Nev. Continue reading
Eriogonum pyrolifolium var. pyrolifolium
Plants herbs, compact or spreading, matted, 0.3–2 dm tall, 0.5–3 dm across, floccose or glabrous; stems with caudex absent or spreading, the aerial flowering stems prostrate to weakly erect, slender, solid, not fistulose, usually arising directly from a taproot, 0.3–1.5 (1.8) dm long, villous to floccose or glabrous; leaves basal, mostly in loose rosettes, the petioles 1–4 cm long, tomentose to floccose, the blades ovate to round, 1–2.5 (4) cm long, 0.8–2 cm wide, grayish- to tannish-lanate or tomentose abaxially, glabrous and green adaxially, or glabrous on both surfaces, the margins entire, plane; inflorescences capitate or umbellate, 1–3 (5) cm long, 1– 4 cm wide, the branches floccose or glabrous, the bracts 2, foliaceous, (0.4) 1–2 cm long, 0.1–0.2 (0.4) cm wide, sometimes absent immediately below involucre; involucres 1 per node (occasionally appearing clustered), campanulate, 4–6 mm long, (3) 4–8 mm wide, pilose or glabrous, the teeth 4–5, erect, 0.6–1 mm long; flowers 4–6 mm long, including a 0.1–0.2 mm long stipelike base, the perianth white to rose, pilose to villous with intermixed glandular hairs abaxially, the tepals monomorphic, obovate, the stamens exserted, 4–8 mm long, the filaments pilose proximally; achenes light brown to brown, 4–5 mm long, glabrous except for pilose beak.
Eriogonum microthecum var. laxiflorum
Plants subshrubs, (1) 2–4 (5) dm tall, 3–8 dm across; stems lacking a caudex, the aerial flowering stems 0.2– 0.6 (0.8) dm long, floccose or tomentose, rarely glabrous; leaf blade usually elliptic, (0.5) 1–2 (2.5) cm long, (0.1) 0.2–0.6 (0.8) cm wide, densely to sparsely whitish-tomentose abaxially, less so to sparsely whitish- floccose adaxially, the margins not revolute; inflorescences (1) 2–4 (8) cm long, the branches floccose or glabrous; involucres 2–3 (3.5) mm long, subglabrous, glabrous, or merely floccose between angled ridges; flowers 2–3 mm long, the perianth white to pink or rose, rarely yellow as individual plants in north-central Arizona; achenes 2–3 mm long.
Eriogonum vimineum
Plants herbs, erect to slightly spreading, 0.5–3 (5) dm tall, thinly tomentose to floccose or glabrous, grayish or reddish gray; aerial flowering stems erect, 0.5–1 dm long, thinly tomentose to floccose, infrequently glabrous, straight or nearly so, infrequently inwardly curved distally; leaves basal, the petioles 1–4 cm long, mostly floccose, the blades round-ovate to rounded, 0.5–2 (2.5) cm long, 0.5–2 cm wide, white-tomentose abaxially, less so to nearly glabrous and grayish or greenish adaxially; inflorescences cymose, often distally uniparous due to suppression of secondary branches, open to somewhat diffuse, 5–25 cm long and wide, the branches floccose or glabrous, the bracts 1–3 mm long, 1–2 mm wide; peduncles absent; involucres appressed to branches, narrowly cylindric, 2–3.5 (4) mm long, 1–2 mm wide, glabrous or infrequently floccose, the teeth 5, erect, 0.3–0.6 mm long; flowers 2–2.5 mm long, the perianth white to rose or pale yellow, glabrous, the tepals slightly dimorphic, those of outer whorl broadly spatulate to obovate, those of inner whorl oblanceolate, the stamens included, 1–1.5 mm long, the filaments pilose proximally or glabrous; achenes brown, trigonous, 2– 2.5 mm long. 2n = 24.
Eriogonum collinum
Plants herbs, erect or spreading, annual, 1–5 (7) dm tall, glabrous or infrequently slightly floccose, greenish, grayish, or reddish; stems with caudex absent, the aerial flowering stems erect, solid, not fistulose, 0.3–1 dm long, glabrous, infrequently slightly floccose proximally; leaves basal, the petioles 1–5 cm long, floccose, the blades elliptic to obovate or orbiculate, (0.5) 1–2.5 (3) cm long, (0.5) 1–3 (3.5) cm wide, tomentose to hirsute abaxially, floccose or glabrous and greenish adaxially, the margins plane; inflorescences cymose to cymose- paniculate or racemose, open, 5–60 cm long, 5–45 cm wide, the branches glabrous, the bracts 3, scalelike, 1–2 (4) mm long, 1–2 mm wide; peduncles ascending, curving, slender, 1–5 cm long, glabrous; involucres turbinate, (1.5) 2–3 mm long, (1) 1.5–2.5 mm wide, glabrous, the teeth 5, erect, 0.5–1 mm long; flowers 1–2.5 mm long, the perianth white to pale yellow, glabrous, pustulose proximally, the tepals monomorphic, lanceolate to spatulate or ovate, the stamens included, 1–1.8 mm long, the filaments glabrous; achenes brown, lenticular, 2–2.5 mm long, glabrous. 2n = 36.
Eriogoneae 
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