Eriogonum ovalifolium var. rubidum

Description by James Reveal and Donald Mansfield in “Two new varieties of Eriogonum ovalifolium from the Intermountain West”. Plants 0.5–5 (–7) dm wide; leaf blades broadly ovate to round, 0.5–1.2 cm long, densely greenish white-tomentose, the margins occasionally brownish; scapes decumbent to prostrate, 0.3–5 cm long, mostly tomentose; inflorescences capitate, 1–2.5 cm wide, the branches absent; involucres 4–8 per cluster, 3–4.5 mm long; flowers 4–5 mm long, the perianth white to rose or red. Flowering Jun-Sep. Sandy to gravelly often worn volcanic slopes and ridges in mixed grassland and sagebrush communities; 2700–3000 m; endemic to Steens Mountain, Harney Co., Oregon.  Continue reading

Eriogonum calcareum var. calcareum

Description. Plants herbs, erect, scapose, (0.7) 1–4.5 (5) dm tall, 0.5–1.5 dm across; stems spreading, without persistent leaf bases, up to 1/5 height of plant, the caudex stems slightly matted, the aerial flowering stems erect, slender, solid, not fistulose, (0.6) 1–4 (5) dm long, glabrous or slightly floccose; leaves basal, 1 per node, the petioles (0.5) 1–3 cm long, tomentose, the blades lanceolate to elliptic or oblong, (0.6) 1–3.5 (4) cm long, (0.3) 0.5–1.5 cm wide, densely white-tomentose on both surfaces, the margins plane; inflorescences capitate, 1.5–2.5 cm long, the branches absent, the bracts 3, scalelike, narrowly triangular, 1–2.5 mm long; peduncles absent or erect, slender, 0.1–0.5 (0.6) cm long, glabrous; involucres solitary on a peduncle or 2–5 (8) per cluster, narrowly turbinate to turbinate, 3–5.5 mm long, (1.5) 2–3 (4) mm wide, rigid, sparsely floccose or glabrous, the teeth 6–8, erect, 0.5–1 mm long; flowers 1.5–3 mm long, the perianth pale to bright yellow, glabrous, the hypanthium only at base of perianth, the tepals monomorphic, broadly oblong, the stamens exserted, 2.5–3.5 (4) mm long, the filaments pilose proximally; achenes light brown, 1.5–3 mm long, glabrous.

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Eriogonum ovalifolium var. ovalifolium

Plants 2.5–4 dm wide; leaf blades usually elliptic to spatulate or oblong, (1) 3–6 cm long, tomentose to floccose, the margins rarely brownish; scapes erect, (4) 5–20 cm long, thinly tomentose; inflorescences capitate, 1–3.5 cm wide, the branches absent; involucres 3–15 per cluster, 4–5 (6.5) mm long; flowers 4–5 mm long, the perianth yellow. 2n = 40. Flowering Apr-Aug. Sandy to gravelly flats, washes, slopes, and ridges, mixed grassland, saltbush, and sagebrush communities, pinyon and/or juniper and montane conifer woodlands; 600–2600 m.

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