Eriogonum hieracifolium

Bentham

in A. P. de Candolle and A. L. P. P. de Candolle, Prodr. 14: 6. 1856.

Common names: Hawkweed wild buckwheat
Illustrated
Synonyms: Eriogonum leucophyllum subsp. pannosum (Wooton & Standley) S. Stokes Pterogonum hieracifolium (Bentham) H. Gross
Treatment appears in FNA Volume 5. Treatment on page 378. Mentioned on page 376, 377.

Herbs, polycarpic, 4–7 dm, strigose; taproot not chambered. Stems: caudex compact; aerial flowering stems usually 2–5, not fistulose, 3.5–5.5 dm, strigose. Leaves basal and cauline; basal petiolate, petiole 0.5–5 cm, strigose, blade oblanceolate to spatulate, 3–15 × 0.5–2(–2.5) cm, sparsely to densely strigose on both surfaces; cauline sessile, blade oblanceolate, 0.5–5(–6) × 0.3–1 cm, similar to basal blade. Inflorescences 0.4–1.5(–1.8) dm; branches strigose; bracts scalelike, 2–8 × 1–3 mm. Peduncles erect, straight, 0.5–3(–3.5) cm, strigose. Involucres turbinate-campanulate to campanulate, 2.5–4 × 2.5–5 mm, hirsute to strigose; teeth 0.5–1.5 mm. Flowers 1.5–2.5 mm in anthesis, 3–5 mm in fruit; perianth yellow in anthesis, reddish in fruit, pilose abaxially; tepals narrowly ovate; stamens 2–3 mm; filaments pilose proximally. Achenes yellowish green to light brown, 4.5–6 mm, strigose, 3-winged along distal 1/2, nearly beakless. 2n = 40.


Phenology: Flowering Jun–Oct.
Habitat: Sandy to gravelly, often calcareous flats and slopes, grassland, saltbush, creosote bush, and mesquite communities, oak, juniper, and montane conifer woodlands
Elevation: (900-)1300-2600 m

Distribution

V5 784-distribution-map.gif

Ariz., N.Mex., Tex., Mexico (Chihuahua).

Discussion

Eriogonum hieracifolium is widely scattered from east-central Arizona (Apache, Gila, Graham, and Navajo counties) and adjacent west-central and southern New Mexico (Bernalillo, Catron, Dona Ana, Eddy, Grant, Lincoln, Otero, and Sierra counties) into Texas (Brewster, Culberson, Jeff Davis, Pecos, and Presidio counties). The species occurs in northeastern Chihuahua, Mexico, as well. Similar plants found near La Linda in Coahuila appear to represent a different taxon, as their vegetative structures are tomentose rather than strigose.

Selected References

None.

Lower Taxa

None.
... more about "Eriogonum hieracifolium"
James L. Reveal +
Bentham +
Undefined subg. Pterogonum +
Hawkweed wild buckwheat +
Ariz. +, N.Mex. +, Tex. +  and Mexico (Chihuahua). +
(900-)1300-2600 m +
Sandy to gravelly, often calcareous flats and slopes, grassland, saltbush, creosote bush, and mesquite communities, oak, juniper, and montane conifer woodlands +
Flowering Jun–Oct. +
in A. P. de Candolle and A. L. P. P. de Candolle, Prodr. +
Illustrated +
Eriogonum leucophyllum subsp. pannosum +  and Pterogonum hieracifolium +
Eriogonum hieracifolium +
Eriogonum subg. Pterogonum +
species +