Description. Plants loose to compact mats, 1–6 dm wide; aerial flowering stems mostly erect, (0.5) 1–2 (3) dm tall; leaf blades linear-oblanceolate to oblong or narrowly elliptic, 2–7 (9) cm long, 0.3–0.8 (1) cm wide, densely tomentose abaxially, tomentose to floccose or glabrous and greenish adaxially; inflorescences subcapitate to umbellate, the branches 0.2–1 cm long; involucres usually turbinate, 4–9 mm long; flowers (4) 5–7 mm long, including a 1–1.5 mm long stipelike base, the perianth cream or pale to bright yellow. 2n = 76, 80. Continue reading
Author Archives: xochipelli2012
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.
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.
Eriogonum douglasii var. meridionale
Plants herbs, matted, occasionally polygamodioecious, 0.4–1.5 dm tall, 0.5–6 dm across, thinly tomentose to glabrate; stems with caudex spreading, the aerial flowering stems erect or nearly so, slender, solid, notfistulose, arising at nodes of caudex branches and at distal nodes of short, nonflowering aerial branches, 0.4– 1.2 dm long, with a whorl of 4–8 foliaceous bracts about midlength, similar to leaf blades, 0.3–1.5 cm long, 0.1–0.3 cm wide; leaves in basal rosettes, the petioles 0.05–0.5 (1) cm long, tomentose, the blades oblanceolate or elliptic to spatulate, 0.4–1.5 (1.9) cm long, –0.5 cm wide, lanate on both surfaces, or tomentose abaxially and slightly less so and greenish adaxially, the margins entire, plane; inflorescences capitate, 0.8–1.5 cm wide, the branches absent, the bracts absent immediately below involucre; involucres 1 per node, turbinate to turbinate-campanulate, 2.5–3.5 mm long, 2–2.5 mm wide, the teeth 6–14, lobelike, strongly reflexed, 4–5 (6) mm long; flowers 4–9 mm long, including a 0.7–2 mm long stipelike base, the perianth yellow, cream, or ochroleucous to rose-red, sparsely to densely villous abaxially, the tepals monomorphic, obovate, the stamens exserted, 4–6 mm long, the filaments pilose proximally; achenes light brown, 3–4.5 mm long, glabrous except for pubescent beak. Southern Oregon, North-Eastern California, North-Western Nevada.
Eriogonum diclinum
Plants herbs, matted, dioecious, (0.5) 1–2 dm tall, 3–8 dm across, sparsely tomentose; 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, nonflowering aerial branches, (0.5) 1–2 dm long, sparsely tomentose; leaves in loose basal rosettes, the petioles 0.7–3 cm long, lanate to tomentose, the blades elliptic to ovate, (0.5) 1–2 cm long, 0.5–1.5 cm wide, densely grayish-lanate on both surfaces, the margins entire, plane; inflorescences of staminate plants capitate, rarely umbellate, 1–2 cm long and wide, those of pistillate plants umbellate, rarely capitate, 1–4 cm long and wide, the branches tomentose to floccose, the bracts 4–6, semi-foliaceous to foliaceous, 3–5 mm long, 1–3 mm wide; involucres 1 per node or 2–3 per cluster, turbinate to turbinate- campanulate, tomentose, the staminate plants 2.5–3 mm long, 3–4 mm wide, teeth 5–6, erect, 1.5–2 mm long, the pistillate plants 3–4 mm long and wide, teeth 4–5, erect, 2.5–3.5 mm long; flowers with a yellow to brownish-yellow, glabrous perianth with monomorphic, oblanceolate to obovate tepals, the staminate flowers 2–3 mm long including a 0.5–0.7 mm long stipelike base, the pistillate flowers (3.5) 5–8 mm long including a 0.5–0.8 mm long stipelike base, the stamens exserted, 1–2 mm long, the filaments pilose proximally; achenes light brown to brown, 3–4 mm long, glabrous except for sparsely pubescent beak.
Eriogonum elegans
Plants herbs, erect, 1–4 (10) dm tall, glabrous, grayish; aerial flowering stems erect, 0.5–1 (2) dm long, glabrous; leaves basal, the petioles 0.3–3 (5) cm long, thinly tomentose, the blades oblong or rounded to subcordate or cordate, 0.3–1.5 (5) long, 0.3–1.5 (6) cm wide, densely white-tomentose abaxially, mostly tomentose and grayish or greenish adaxially; inflorescences cymose, occasionally distally uniparous due to suppression of secondary branches, open to somewhat diffuse, 5–35 (80) cm long, 5–30 (80) cm wide, the branches glabrous, the bracts 0.5–2 mm long, 1–2 mm wide; peduncles absent; involucres somewhat appressed to branches, turbinate, 1–1.5 long, 0.6–0.8 mm wide, glabrous, the teeth 5, erect, 0.2–0.3 mm long; flowers 1–1.5 mm long, the perianth white to rose, glabrous or infrequently puberulent, the tepals slightly dimorphic, those of outer whorl oblong-obovate, those of inner whorl oblong, the stamens included, 1 mm long, the filaments pilose proximally; achenes brown, trigonous, 1–1.5 mm long.
Chorizanthe membranacea
Plants erect, 1–6 (10) dm tall, 0.5–3 (5) dm across, woolly-floccose; leaves basal and cauline, the petiole 0.1– 0.5 (0.8) cm long, the leaf-blade linear to narrowly oblanceolate, (1) 1.5–5 cm long, 0.1–0.3 cm wide, thinly to densely floccose adaxially, densely tomentose abaxially; inflorescences strict, open, white to greenish; bracts usually 2, opposite, rarely in whorls of 3–5, foliaceous, short-petiolate, acerose, similar to proximal leaf blades only reduced, 0.3–3 cm long, 0.1–0.3 cm wide, the awns straight, 0.5–1 mm long; involucres usually congested in small terminal clusters of 1–3 at node of dichotomies, urceolate, ventricose basally, 6-ribbed, 3- angled, 3–4 mm long, not corrugate, tomentose to floccose or glabrate with age, greenish to brownish, the teeth 6, all of an equal length, spreading with a broad, conspicuous, white margins extending across sinuses, the awns uncinate, 0.7–1.5 mm long; flowers 1 (2), slightly exserted, the perianth white to rose, subcylindric, (1.5) 2.5–3 mm long, densely pubescent abaxially, the hypanthium 2/3 length of perianth, the tepals slightly dimorphic, entire and rounded apically, those of outer whorl obovate, those of inner whorl spatulate, the stamens 9, slightly exserted, the filaments distinct, adnate at base of hypanthium, 1.5–2.5 mm long, glabrous, the anthers pink to red, oval, 0.2–0.3 mm long; achenes brown, globose, 2.5–3 mm long, the embryo curved; 2n = 38, 40, (42), 80, 82, 84.
Eriogonum gracile
Plants herbs, erect to spreading or somewhat decumbent, (0.7) 1.5–5 (7) dm tall, lanate to tomentose or floccose, rarely glabrous, greenish to whitish or grayish; aerial flowering stems erect, 0.5–2 dm long, lanate to tomentose or floccose, rarely glabrous; leaves basal and cauline; basal: petiole 1–4 cm long, floccose, not winged, blade oblanceolate to oblong, (0.8) 1–4 (6) cm long, 0.5–2 cm wide, tomentose abaxially, less so to floccose and greenish to grayish adaxially; cauline: petiole 0.3–2 cm long, floccose, blade oblanceolate, 0.5–3 cm long, 0.3–1.5 cm wide, similar to basal blade; inflorescences cymose, occasionally distally uniparous due to suppression of secondary branches, open to somewhat diffuse, 0.5–4 cm long, 0.5–3 cm wide, the branches lanate to tomentose or floccose, rarely glabrous, straight or nearly so, not inwardly curved distally, the bracts 0.5–3 mm long, 1–3 mm wide; peduncles absent; involucres somewhat appressed to branches, turbinate, (1.8) 2–3 mm long, 1.5–2 mm wide, floccose or glabrous, the teeth 5, erect, 0.3–0.6 mm long; flowers 1.5–3 mm long, the perianth white to pink or yellow, glabrous, the tepals monomorphic, lanceolate to oblong, the stamens mostly included, 1–1.5 mm long, the filaments pilose proximally; achenes brown, trigonous, 1–2 mm long. 2n = 22.
Chorizanthe ventricosa
Plants spreading and diffuse, (0.5) 1–5 dm tall, 1–5 (7) dm across, pubescent; leaves basal, the petiole 0.3–1 (1.5) cm long, the leaf-blade oblanceolate, (0.5) 1–3 (4) cm long, (0.2) 0.4–1 (1.2) cm wide, thinly pubescent on both surfaces; inflorescences with involucres in open clusters 2–6 cm diam., not disarticulating at the nodes, greenish or reddish; bracts 2–3 at proximal node, usually opposite, usually foliaceous, often with whorl of sessile bracts about midstem, oblanceolate to elliptic, 0.5–1.5 cm long, 0.1–0.4 cm wide, gradually becoming reduced, linear-lanceolate, 0.4–1.2 (1.5) cm long, 0.15–0.5 cm wide, at distal nodes scalelike, linear and aciculate, acerose, the awns straight, 1–3 mm long; involucres 3–10 or more, urceolate, strongly ventricose basally, 3-angled and 6-ribbed, 4–4.5 mm long, corrugate, thinly pubescent, greenish or reddish, without scarious or membranous margins, the teeth spreading, unequal, 1–3 mm long, the awns straight or uncinate with longer anterior one straight and mostly 2 mm long, others uncinate and 0.5–1 mm long; flowers exserted, the perianth bicolored with hypanthium white to greenish-yellow and tepals red to maroon, cylindric, 4–4.5 mm long, sparsely pubescent, the hypanthium 1/2 length of perianth, the tepals dimorphic, oblong, those of outer whorl spreading and recurved, slightly longer than those of inner whorl, broadly obcordate, slightly erose or at least wavy and rounded apically, those of inner whorl erect, narrower, fimbriate and truncate or somewhat bilobed apically, the stamens 9, exserted, the filaments distinct, adnate at base of hypanthium, 3.5–4 mm long, glabrous, the anthers pink to red or maroon, oblong, 1–1.3 mm long; achenes brown, globose- lenticular, 3–3.5 mm long, the embryo straight; 2n = 40, 42, 44.
Eriogoneae 
You must be logged in to post a comment.