Plants shrubs, (3) 5–15 dm tall, 5–15 dm across; leaves cauline 1⁄2 or more length of flowering stem, the petioles 0.5–1.5 cm long, the blades broadly ovate to nearly orbiculate, 1–3 (3.5) cm long and wide, floccose to tomentose on both surfaces or floccose adaxially; inflorescences compact and rather flat-topped, 3–10 cm long, the branches densely tomentose; involucres 2–3.5 mm long, 1.5–2.5 mm wide; flowers 2.5–3 mm long, the perianth white, glabrous. Continue reading
Author Archives: xochipelli2012
Eriogonum lancifolium
Plants shrubs, spreading, not scapose, 3.5–8 (10) dm tall, 5–10 (13) dm across, grayish-tomentose, grayish; stems spreading, usually without persistent leaf bases, sheathing up to 1⁄2 or more height of plant, the caudex stems absent, the aerial flowering stems erect to spreading, slender, solid, not fistulose, 0.5–1.2 dm long, tomentose; leaves cauline, 1 per node, the petioles 0.3–0.6 cm long, tomentose, the blades lanceolate to elliptic, 3–5 cm long, 0.5–2 cm wide, densely silvery-tomentose on both surfaces or rarely less so to subglabrous and greenish abaxially, the margins plane or slightly revolute, sometimes crenulate; inflorescences cymose, often compact, (3) 6–14 dm tall, 3–10 dm wide, the branches dichotomous, tomentose to subglabrous, the bracts 3, scalelike, linear, and 1.5–3 mm long, or leaflike, 10–15 mm long, and similar to leaf blades; peduncles absent; involucres 1 per node, turbinate, 2.5–3 mm long, 1.5–2 mm wide, the teeth 5, erect, 0.4–1 mm long; flowers (2) 2.5–3.5 mm long, the perianth white to cream, glabrous, the hypanthium 1⁄4 length of perianth, essentially monomorphic, spatulate, the stamens exserted, 1.5–4.5 mm long, the filaments glabrous or slightly pilose proximally; achenes brown, 2–2.5 mm long, glabrous. 2n = 40.
Eriogonum batemanii
Plants spreading, not scapose, (1) 1.5–3.5 (5) dm tall, 1–2.5 dm across, glabrous, grayish; stems spreading, usually without persistent leaf bases, up to 1⁄4 height of plant, the caudex stems absent, the aerial flowering stems erect, slender, solid, not fistulose, 1–2 dm long, glabrous; leaves basal, 1 per node, the petioles 0.8–2.5 (4) cm long, tomentose, the blades elliptic, (1) 1.5–3 (5) cm long, 0.6–1 (1.2) cm wide, densely white- tomentose abaxially, less so and white adaxially, the margins plane; inflorescences cymose, 4–15 cm long, 5– 15 cm wide, the branches dichotomous, glabrous, the bracts 3, scalelike, triangular, 1–2 mm long; peduncles absent; involucres (1) 2–5 per cluster, turbinate, 2–4 mm long, 1.5–2.5 (3.5) mm wide, glabrous, the teeth 5, erect, 0.5–0.8 mm long; flowers 1.5–3 mm long, the perianth white, glabrous, the hypanthium 1⁄4–1⁄3 length of perianth, the tepals monomorphic, obovate, the stamens exserted, 1.5–3.5 mm long, the filaments sparsely pilose proximally; achenes light brown to brown, 2.5–3 mm long, glabrous. 2n = 40.
Eriogonum hylophilum
Plants subshrubs, spreading, not scapose, 2.5–4 dm tall, 3–5 dm across, tomentose, greenish; stems spreading, often with persistent leaf bases, up to 1⁄4 or more height of plant, the caudex stems somewhat matted, the aerial flowering stems erect or nearly so, somewhat stout, solid, not fistulose, 0.5–1.5 dm long, tomentose; leaves cauline and sheathing proximal 1⁄3 of stem, 1 per node, the petioles 0.5–1 (1.8) cm long, tomentose, the blades linear-lanceolate to lanceolate, 3.5–7 (9) cm long, 0.3–0.6 (0.8) cm wide, densely white-tomentose abaxially, less so and greenish adaxially, the margins plane and slightly revolute, rarely crenulate; inflorescences cymose, open, 3–8 cm long, 3–10 cm wide, the branches dichotomous, tomentose, the bracts 3, scalelike, triangular, and 2–3 mm long, or leaflike, 1–2 cm long, and similar to leaf blades; peduncles absent; involucres 1 per node or 2–3 per cluster, turbinate, 3.5–4 mm long, 2.5–3 mm wide, the teeth 5–6, erect, 0.5–1 mm long; flowers (3) 3.5–4 (4.5) mm long, the perianth white, glabrous, the hypanthium 1⁄4 length of perianth, the tepals slightly dimorphic, those of outer whorl spatulate, 1.3–1.7 (2) mm wide, those of inner whorl oblanceolate, 0.6–0.9 (1.2) mm wide, the stamens included, 2–3 (3.5) mm long, the filaments pilose proximally; achenes brown, 2.5–3 mm long, glabrous except for slightly papillate beaks. Continue reading
Eriogonum brevicaule var. laxifolium
Plants mostly erect, 1–3.5 dm tall, 1–5 dm across; aerial flowering stems erect or nearly so, scapelike or dichotomous, (0.7) 1–2.5 dm long, tomentose to floccose; leaf blades linear to narrowly oblanceolate, (1.5) 3– 9 (12) cm long, 0.1–0.5 (0.7) cm wide, tomentose abaxially, less so and grayish or occasionally greenish adaxially, the margins plane or more often revolute; inflorescences umbellate or cymose divided 1–3 times and 2–5 (8) cm long, or capitate and 1–2 cm long, the branches tomentose to floccose; involucres 1 per node or more commonly 3–7 per cluster, turbinate to turbinate-campanulate, (2) 2.5–4 mm long, 1.5–3 mm wide, usually tomentose, occasionally thinly floccose or glabrous; flowers (2) 3–3.5 (4) mm long, the perianth yellow or ochroleucous, glabrous.
Eriogonum viridulum
Plants spreading, not scapose, 1–3.5 dm tall, 1–4 dm across, glabrous, bright green; stems spreading, without persistent leaf bases, up to 1/5 height of plant, the caudex stems absent, the aerial flowering stems erect, slender, solid, not fistulose, 0.5–1.2 dm long, glabrous, tomentose among leaves; leaves sheathing 1–4 (6) cm, 1 per node, the petioles 0.1–0.2 cm long, tomentose or glabrous, the blades linear or rarely narrowly elliptic, 1– 3 (4) cm long, 0.1–0.2 (0.5) cm wide, densely white-tomentose abaxially, glabrous and green adaxially, the margins usually tightly revolute; inflorescences cymose, 3–15 cm long, 2–10 cm wide, the branches dichotomous, glabrous, the bracts 3, scalelike, narrowly triangular, 1–3 mm long; peduncles absent or erect, slender, 0.05–0.2 cm long; involucres 1 per node, turbinate, 2–3 mm long, 1.5–2 mm wide, glabrous, the teeth 5, erect, 0.5–0.8 mm long; flowers 1.5–2 mm long, the perianth yellow, glabrous, the hypanthium 1⁄4–1⁄3 length of perianth, the tepals slightly dimorphic, those of outer whorl ovate, 1–1.2 wide, those of inner whorl oblong, 0.7–0.8 mm wide, the stamens exserted, 1.5–2 mm long, the filaments pilose proximally; achenes brown, 1.5– 2 mm long, glabrous.
Eriogonum wetherillii
Plants herbs, spreading, annual, 0.5–2.5 dm tall, glabrous, reddish-green to reddish; stems with caudex absent, the aerial flowering stems erect, solid, not fistulose, 0.1–0.4 dm long, glabrous except somewhat villous proximally; leaves basal, the petioles 1–5 cm long, tomentose to floccose, the blades oblong to orbiculate, (0.5) 1–4 cm long, (0.5) 1–3 cm wide, densely white-tomentose abaxially, floccose to glabrate and reddish or greenish adaxially, the margins plane; inflorescences cymose, diffuse, flat-topped to rounded, 5–20 cm long, 10–35 cm wide, the branches glabrous, the bracts 3, scalelike, 0.5–2 mm long, 1–2 mm wide; peduncles erect, straight, filiform, (0.3) 0.5–1 cm long, glabrous, rarely absent distally; involucres turbinate, (0.3) 0.5–1 mm long, (0.2) 0.5–1 mm wide, glabrous, the teeth 4, erect, 0.1–0.3 mm long; flowers 0.5–1.2 mm long in early anthesis, becoming 1–1.5 mm long, the perianth yellowish to red in early anthesis, becoming pink to rose, glabrous, the tepals monomorphic, elliptic to obovate, the stamens included to slightly exserted, 0.7–1 mm long, the filaments glabrous; achenes dark brown to black, lenticular, 0.6–1 mm long, glabrous. Continue reading
Eriogonum mortonianum
Plants shrubs, erect to spreading, not scapose, (3) 4–10 dm tall, 5–20 dm across, essentially glabrous and bright green; stems spreading, without persistent leaf bases, up to 1⁄3 height of plant, the caudex stems absent, the aerial flowering stems erect to spreading, slender, solid, not fistulose, 0.2–2 dm long, glabrous; leaves cauline on proximal 2⁄3 of stem, 1 per node, the petioles (0.2) 0.3–0.8 (1) cm long, floccose or glabrous, the blades elliptic, 1.5–4 (4.5) cm long, (0.3) 0.6–1 (1.3) cm wide, glabrous and green on both surfaces, the margins plane; inflorescences cymose, open, 15–25 cm long, 13–30 cm wide, the branches often with involucres racemosely arranged at tips of inflorescence branches, glabrous, the bracts 3, scalelike, triangular, 1–2 mm long; peduncles absent; involucres 1 per node, turbinate, 2–2.5 mm long, 1.2–1.8 (2) mm wide, glabrous, the teeth 5, erect, 0.2–0.3 mm long; flowers (2) 2.5–3 mm long, the perianth pale yellow to yellow or whitish, glabrous, the hypanthium 1⁄4 length of perianth, the tepals dimorphic, those of outer whorl obovate, 1– 1.3 mm wide, those of inner whorl oblanceolate, 0.8–1 mm wide, the stamens included to slightly exserted, 2– 2.5 mm long, the filaments pilose proximally; achenes brown, 3–3.5 mm long, glabrous. 2n = 40.
Flowering Jul-Sep. Red, gypsophilous clay flats and outcrops, mixed grassland, saltbush, and blackbrush communities; 1400–1600 m; low, gypsophilous hills west and southwest of Fredonia, Mohave Co., Arizona.
Eriogonum zionis var. coccineum
Plants erect, 3–6 dm tall; aerial flowering stems fistulose, glabrous or tomentose; leaf blades elliptic to ovate, 3–4 (6) cm long, 1.5–2 (5) cm wide; inflorescences 20–45 cm long; involucres 2–3 mm long; flowers 4–6 (7) mm long, the perianth bright red.
Flowering Jul-Sep. Loamy to gravelly flats and rim edges, sagebrush communities, juniper, pinyon, and montane conifer woodlands; 1300–2300 m; edges of the Grand Canyon (1950–2300 m) in Coconino Co., and in the Hack Canyon area (1300–1500 m) of eastern Mohave Co., Arizona.
Eriogonum thompsoniae var. thompsoniae
Plants herbs, spreading, not scapose, 2–5 (6) dm tall, 2–5 dm across, glabrous, green; stems spreading, without persistent leaf bases, up to 1/5 height of plant, the caudex stems spreading, glabrous, the aerial flowering stems erect, slender, solid, not fistulose, 1.2–3 dm long, glabrous, tomentose among leaves; leaves basal or sheathing up stem less than 2 cm, 1 per node, the petioles (0.1) 3–7 (10) cm long, tomentose to floccose or glabrous, the blades linear or oblong to oblanceolate or elliptic, 2–8 (10) cm long, 0.2–2.5 (3) cm wide, thinly to densely white-tomentose abaxially, glabrous and green adaxially, the margins plane or slightly revolute; inflorescences cymose, open, 10–30 cm long, 10–25 cm wide, the branches dichotomous, glabrous, the bracts 3, scalelike, linear, 2–5 (7) mm long; peduncles absent; involucres 1 per node, turbinate, 2–3 (3.5) mm long, 1–1.5 (2) mm wide, glabrous, the teeth 5, erect, 0.4–0.5 mm long; flowers 3–3.5 mm long, the perianth yellow or white, glabrous, the hypanthium up to 1⁄2 length of perianth, the tepals monomorphic, oblong to obovate, the stamens slightly exserted, 3–3.5 (4) mm long, the filaments sparsely pilose proximally; achenes light brown to brown, 2.5–3 mm long, glabrous except for slightly papillate beaks. Continue reading
Eriogoneae 
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