Eriogonum parishii |
Eriogonum abertianum |
|
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mountainmist, Parish's buckwheat, Parish's wild buckwheat |
Abert's buckwheat, Abert's wild buckwheat |
|
Habit | Herbs, spreading, annual, 1–4(–5) dm, glabrous, greenish to reddish brown. | Herbs, erect or spreading, annual, 0.5–6(–7) dm, hirsute, greenish, grayish, tawny, or reddish. |
Stems | caudex absent; aerial flowering stems erect, solid, not fistulose, 0.3–1 dm, glabrous, glandular distally. |
caudex absent; aerial flowering stems prostrate to erect, solid, not fistulose, 0.1–1 dm, appressed-hirsute. |
Leaves | basal; petiole 0.5–2.5 cm, hirsute, slightly winged; blade spatulate, 2–6 × 0.5–2 cm, hirsute and greenish on both surfaces, margins plane, often ciliate. |
basal and cauline; basal: petiole 0.5–6 cm, villous to hoary, blade oblong to obovate, 1–4 × 1–3 cm, villous to hoary-tomentose and greenish, tawny, or reddish on both surfaces, margins plane, occasionally crenulate; cauline sessile, blade linear, lanceolate, or narrowly obovate, 1–4 × 0.3–2 cm, similar to basal blade. |
Inflorescences | cymose, usually diffuse, 10–35 × 10–50 cm; branches not fistulose, glabrous, glandular at nodes; bracts 3, scalelike, 1–2 × 1–2 mm. |
cymose, open to diffuse, 5–40(–60) × 5–50 cm; branches hirsute; bracts 3–6, semileaflike, 2–10 × 1–3 mm. |
Peduncles | spreading, straight, capillary, 0.4–1.5(–2.5) cm, glabrous or sparsely glandular at least proximally. |
ascending to erect, mostly straight, slender, 0.5–6 cm, villous to hoary-tomentose. |
Involucres | turbinate, 0.5–0.9 × 0.5–0.7 mm, glabrous; teeth 4, erect or nearly so, 0.3–0.5 mm. |
broadly campanulate, 2–3 × 2–3 mm, villous-canescent; teeth 5, lobelike, usually reflexed, 4–6 mm. |
Flowers | 0.5–0.9 mm; perianth pink to red with red midribs, puberulent, becoming white with pink to red midribs; tepals slightly dimorphic, those of outer whorl ovate and 0.5–0.7 mm wide, those of inner whorl oblong and 0.4–0.5 mm wide; stamens included, 0.5–0.6 mm; filaments glabrous. |
3–4.5 mm; perianth white to pale yellow in early anthesis, becoming reddish or rose, glabrous; tepals dimorphic, those of outer whorl orbiculate-cordate, those of inner whorl lanceolate to spatulate; stamens mostly exserted, 1.5–3.5 mm; filaments mostly pilose proximally. |
Achenes | dark brown to blackish, 3-gonous, 1–1.3 mm, glabrous. |
brown to dark brown, lenticular, 0.6–1 mm, glabrous. |
2n | = 40. |
= 40. |
Eriogonum parishii |
Eriogonum abertianum |
|
Phenology | Flowering Jun–Oct. | Flowering year-round. |
Habitat | Granitic sandy flats and slopes, mixed grassland, chaparral, and sagebrush communities, oak and montane conifer woodlands | Sandy, gravelly, or clayey flats, washes, and slopes, mixed grassland, saltbush, greasewood, creosote bush, blackbrush, and manzanita communities, oak and conifer woodlands |
Elevation | (1000-)1300-3200 m ((3300-)4300-10500 ft) | 400-2500 m (1300-8200 ft) |
Distribution |
CA; Mexico (Baja California)
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AZ; NM; TX; Mexico (Coahuila, Chihuahua, Sonora, San Luis Potosí)
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Discussion | Eriogonum parishii occurs from southern Mono County in the White Mountains southward in the Sierra Nevada of Inyo and Tulare counties to scattered desert ranges in San Bernardino (San Bernardino Mountains), Riverside (San Jacinto and Santa Rosa mountains), and San Diego (Laguna Mountains) counties. In Mexico, the species occurs as far south as the Sierra San Pedro Martír in Baja California Norte. A disjunct population from Crown King, Yavapai County, Arizona (Beaty s.n., 6 Sep 1951, CAS) requires confirmation. Possibly it is a recent introduction. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Eriogonum abertianum is widespread and common to abundant or even locally weedy. It is basically a species of the Chihuahuan and Sonoran deserts, ranging from San Luis Potosí and Sonora in northern Mexico to western Texas and much of New Mexico and Arizona. This species is exceedingly variable and can be differentiated into several geographic and seasonal phases (C. C. Baskin et al. 1993; G. A. Fox 1989, 1990, 1990b). Variety abertianum (including E. pinetorum) is a more northern and western, summer- and fall-flowering expression, with an erect habit and a cymose-paniculate inflorescence when the plants are in fruit. A vernal phase (var. villosum) of this northern form occurs throughout much of the same range (mainly Arizona, New Mexico, and the Sonoran Desert of Mexico). It is a hairier and more spreading expression, with elongated inflorescence branches bearing more floriferous involucres. Variety ruberrimum (including E. cyclosepalum) is the more southern, summer- to fall-flowering expression (mainly New Mexico, Texas, and the Chihuahuan Desert of Mexico) with a prostrate to spreading, compact habit and a racemose inflorescence at full maturity. There is a vernal expression of this as well; it differs from the vernal form of var. abertianum in having longer peduncles. There are no sharp morphologic or geographic boundaries for any of these expressions, and while the fruiting extremes are clearly distinguishable, far too many specimens are impossible to place satisfactorily. The Navajo (Diné) people use these plants as a lotion for both themselves and their horses (P. A. Vestal 1952). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 5, p. 390. | FNA vol. 5, p. 407. |
Parent taxa | Polygonaceae > subfam. Eriogonoideae > Eriogonum > subg. Ganysma | Polygonaceae > subfam. Eriogonoideae > Eriogonum > subg. Ganysma |
Sibling taxa | ||
Synonyms | E. abertianum var. cyclosepalum, E. abertianum var. lappulaceum, E. abertianum var. neomexicanum, E. abertianum subsp. pinetorum, E. abertianum var. ruberrimum, E. abertianum var. villosum, E. cyclosepalum, E. pinetorum | |
Name authority | S. Watson: Proc. Amer. Acad. Arts 17: 379. (1882) | Torrey: in W. H. Emory, Not. Milit. Reconn., 150. (1848) |
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