Plants shrubs, erect or slightly spreading, not scapose, 2–5 dm tall, 2–8 dm across, densely tomentose, tannish; stems mostly erect, without persistent leaf bases, up to 1⁄2 height or more of plant, the caudex stems absent, the aerial flowering stems erect, stout, solid, not fistulose, 2–4 dm long, tomentose; leaves 1 per node and sheathing up stems or fasciculate at tips of basal branches, the petioles 0.1–0.5 (1) cm long, tomentose, the blades oblanceolate to narrowly oblong, (1.5) 2–4 (5) cm long, 1–2.5 (3) cm wide, densely white-tomentose abaxially, floccose adaxially, the margins plane; inflorescences cymose, 15–30 (40) cm long, 15–40 cm wide, the branches dichotomous, tomentose, the bracts 3, semi-foliaceous, narrowly oblanceolate, 3–7 mm long, 1–3 mm wide; peduncles absent or erect, slender, (1) 3–10 cm long, tomentose; involucres 1 per node, turbinate- campanulate, 3.5–5 mm long, 2.5–4 mm wide, tomentose, the teeth 5–8, erect, 0.4–0.8 mm long; flowers 3–6 (7) mm long, the perianth white, densely villous abaxially, the hypanthium 1⁄3 length of perianth, the tepals monomorphic, narrowly oblong, the stamens exserted, 3–7 mm long, the filaments pilose proximally; achenes brown, 3–5 mm long, villous.
Author Archives: xochipelli2012
Eriogonum lobbii
Plants herbs, compact or sprawling, matted, 0.3–3 dm tall, 1–2.5 dm across, tomentose to floccose; stems with caudex absent or nearly so, the aerial flowering stems prostrate to decumbent or weakly erect, slender or stout, solid, not fistulose, usually arising directly from a taproot, 0.5–1.5 (2) dm long, tomentose to floccose; leaves basal, in well-defined rosettes, the petioles (0.8) 1–3.5 (5) cm long, tomentose to floccose, the blades ovate to obovate or round-oval, 1–4 (5) cm long and wide, densely white- to grayish- or reddish-tomentose abaxially, less so to floccose or glabrous and greenish adaxially, the margins entire, plane; inflorescences subcapitate to umbellate or infrequently biumbellate, 1–4 cm long and wide, the branches tomentose to floccose, the bracts 3–5 at proximal node, foliaceous, 0.6–1.5 (2.5) cm long, 0.1–0.5 (0.8) cm wide, sometimes absent immediately below involucre; involucres 1 per node, turbinate-campanulate to campanulate, 5–10 (12) mm long and wide, thinly tomentose to lanate, the teeth 6–10, usually lobelike, mostly reflexed, 2–6 mm long; flowers 5–7 mm long, including a 0.1–0.4 mm long stipelike base, the perianth white to rose, glabrous, the tepals monomorphic, oblong-obovate, the stamens exserted, 5–7 mm long, the filaments pilose proximally; achenes light brown to brown, 4.5–6 mm long, glabrous. 2n = 40.
Eriogonum umbellatum var. argus
Plants herbs, usually spreading mats, 1–3 dm tall, 5–15 dm across; aerial flowering stems erect, (0.8) 1–2 dm long, thinly tomentose to floccose or glabrous, often with single foliaceous bract about mid-length; leaves in loose rosettes, the blades oblanceolate to elliptic, (0.7) 1–2 (2.5) cm long, 0.4–1 cm wide, mostly thinly tomentose abaxially, floccose or glabrous adaxially, the margins often finely wavy; inflorescences umbellate or compound-umbellate, branched 2–4 times, the branches usually floccose or glabrous, without a whorl of bracts about mid-length; involucral tubes 2–3 mm long, the lobes 2–3 (4) mm long; flowers 3–8 mm long, the perianth bright yellow.
Eriogonum umbellatum var. bahiiforme
Plants herbs, spreading mats, 0.8–2 (2.5) dm tall, 3–6 dm across; aerial flowering stems erect, usually 0.5–1.5 dm long, tomentose, without one or more foliaceous bracts about midlength; leaves in rather compact rosettes, the blades elliptic to oval, 0.5–1.5 (1.7) cm long, 0.3–0.7 cm wide, densely white- to gray-lanate on both surfaces, the margins plane; inflorescences compound-umbellate, branched 2–5 times, the branches tomentose, without a whorl of bracts about midlength; involucral tubes 2–3 mm long, the lobes 2–3.5 (4) mm long; flowers 5–8 mm long, the perianth bright yellow.
Eriogonum congdonii
Plants subshrubs, spreading to erect, synoecious, 1.5–5 dm tall, 1–3 dm across, floccose or glabrous; stems with caudex spreading to somewhat erect, the aerial flowering stems erect, slender, solid, not fistulose, arising at nodes of caudex branches and at distal nodes of short, nonflowering aerial branches, 1–2 (2.5) dm long, thinly floccose or glabrous; leaves in rather compact basal rosettes, the petioles 0.2–0.8 cm long, the blades narrowly elliptic to narrowly oblong, 0.5–2 cm long, 0.3–0.6 (0.8) cm wide, densely white-tomentose abaxially, thinly floccose or glabrous and olive green adaxially, the margins entire, revolute; inflorescences umbellate, 0.3–3 cm long, 1–3.5 cm wide, the branches thinly floccose or glabrous, the bracts 3–4, semi- foliaceous, lanceolate, 0.1–0.5 mm long, 0.1–0.3 mm wide; involucres 1 per node, turbinate, 5–6 mm long, 3– 4 mm wide, tomentose, the teeth 6–8, erect, 0.5–2 mm long; flowers 4–6 mm long, including a 0.4–0.6 mm long stipelike base, the perianth sulphur yellow, glabrous, the tepals monomorphic, obovate, the stamens exserted, 4–5 mm long, the filaments pilose proximally; achenes light brown, 4–5.5 mm long, glabrous except for sparsely pubescent beak. Continue reading
Eriogonum nudum var. oblongifolium
Plants 5–10 (18) dm tall; aerial flowering stems not fistulose, 2–5 (8) dm long, tomentose to floccose; leaves basal, the blades 2–4 cm long, 1.5–2 cm wide, tomentose abaxially, thinly floccose adaxially, the margins plane; inflorescences cymose, 20–50 (100) cm long, 10–50 cm wide, the branches tomentose to floccose; involucres 3–6 per cluster, 3–5 mm long, tomentose; flowers 3–4 mm long, the perianth white to rose or yellow, pubescent. 2n = 40.
Eriogonum strictum var. greenei
Plants herbs, erect, loosely to densely matted, not scapose, 1–5 dm tall, 1–10 dm across, tomentose or glabrous; stems spreading to erect, with or without persistent leaf bases, up to 1⁄4 height of plant, the caudex stems absent or spreading to matted, the aerial flowering stems erect to spreading, slender, solid, not fistulose, 1–3 dm long, tomentose or glabrous; leaves basal, 1 per node, the petioles rarely twisted or curled, 1–6 cm long, mostly tomentose, the blades elliptic to ovate, 0.5–2.5 (4) cm long, (0.3) 0.5–1.5 cm wide, lanate, tomentose to floccose on both surfaces, sometimes sparsely tomentose to floccose and greenish or floccose to subglabrous or glabrous adaxially, the margins plane; inflorescences umbellate-cymose to cymose, 1–20 cm long, 3–25 cm wide, the branches dichotomous, tomentose to floccose or less often glabrous, the bracts 3, scalelike, triangular, 1–3 mm long; peduncles absent; involucres 1 per node, rarely 2–5 per cluster, narrowly turbinate to turbinate-campanulate, 4–6 mm long, 1.5–5 mm wide, tomentose or glabrous, the teeth 5, erect, 0.5–1.3 mm long; flowers 3–5 (6) mm long, the perianth yellow or white to rose or purple, glabrous, the hypanthium only at base of perianth, the tepals dimorphic, those of outer whorl elliptic to nearly orbiculate, 2–3 mm long and wide, those of inner whorl oblanceolate to oblong, 3–4 mm long, 1–2 mm wide, the stamens included to slightly exserted, 2–5 mm long, the filaments pilose proximally; achenes light brown to brown, 3– 3.5 mm long, glabrous.
Eriogonum umbellatum var. lautum
Plants herbs, spreading mats, 1–3 dm tall, 3–10 dm across; aerial flowering stems erect, 1–2 dm long, tomentose, without one or more foliaceous bracts about midlength; leaves in rather loose rosettes, the blades broadly elliptic, (1) 1.5–4 cm long, (0.5) 0.8–1.8 (2) cm wide, densely white-tomentose to lanate abaxially, white-tomentose and greenish, rarely some floccose or even glabrous and green adaxially, the margins plane; inflorescences compound-umbellate, 3–10 (12) cm long, the branches tomentose, without a whorl of bracts about midlength; involucral tubes (3) 3.5–5 mm long, the lobes (3) 4–6 mm long; flowers 4–7 mm long, the perianth bright yellow. Continue reading
Eriogonum ursinum var. erubescens
Plants 1.5–2.5 dm tall, (1.5) 2–8 (12) dm across; aerial flowering stems 0.4–2 dm long, thinly tomentose to floccose. Leaves with petioles 0.5–1.5 cm long, the blades elliptic, 0.7–2 (2.2) cm long, 0.4–1 (1.2) cm wide, densely white-tomentose abaxially, sparsely floccose or glabrous and green adaxially; inflorescences thinly tomentose; proximal bracts 4–6, lanceolate to narrowly elliptic, 1–2 cm long, 0.25–0.6 cm wide, distal bracts semi-foliaceous, midway along branch, linear to narrowly lanceolate, 0.7–1 cm long, 0.1–0.25 cm wide; involucres turbinate to turbinate-campanulate, 5–8 mm long, 3–4 mm wide; flowers 5–7 mm long at anthesis, 6.5– 9 mm long in fruit, the perianth cream, rarely yellow, becoming suffused with blush of pinkish-red to maroon; achenes (5) 5.5–8 mm long.
Eriogonum ammophilum
Plants subshrubs, spreading to somewhat sprawling, not scapose, (1.5) 2–4 dm tall, 2–5 dm across, glabrous, grayish; stems decumbent to spreading, without persistent leaf bases, up to 1⁄4 height of plant, the caudex stems absent or slightly spreading in moving sand, the aerial flowering stems spreading, slender, solid, not fistulose, 0.5–1.5 dm long, glabrous; leaves basal or sheathing up proximal 1⁄4 of flowering stems, 1 per node, the petioles 0.1–0.5 (1) cm long, tomentose to floccose, the blades broadly elliptic, 1–2 (2.5) cm long, 0.8–1.7 cm wide, densely white-tomentose abaxially, less so to subglabrous and green adaxially, the margins plane; inflorescences cymose, open, 5–20 cm long and wide, the branches dichotomous, glabrous, the bracts 3, scalelike, triangular, 1–2.5 mm long; peduncles absent or erect, restricted to proximal nodes, (0.2) 0.5–1 (1.5) cm long, glabrous; involucres 1 per node, turbinate, (2.5) 3–3.5 mm long, 2–2.5 mm wide, glabrous, the teeth 5, erect, 0.4–0.8 mm long; flowers 2–3 mm long, the perianth white, glabrous, the hypanthium 1⁄4 length of perianth, essentially monomorphic, narrowly obovate, the stamens slightly exserted, 2.5–3.5 mm long, the filaments puberulent proximally; achenes light brown, 3–3.5 mm long, glabrous except for distinctly papillate beaks.
Eriogoneae 
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