Pseudognaphalium arizonicum

(A. Gray) Anderberg

Opera Bot. 104: 147. 1991.

Common names: Arizona rabbit-tobacco
Basionym: Gnaphalium arizonicum A. Gray
Treatment appears in FNA Volume 19. Treatment on page 424. Mentioned on page 417.
Revision as of 15:14, 18 September 2019 by FNA>Volume Importer

Annuals or perennials, 20–50 cm; taprooted. Stems loosely and densely woolly-tomentose (hairs usually with reddish or purplish cross walls), not glandular. Leaf blades linear-oblanceolate to linear-lanceolate, 2–6 cm × 2–7 mm, bases not clasping, decurrent 3–15(–20) mm, margins weakly and narrowly revolute, faces concolor to weakly bicolor, tomentose (hairs commonly with reddish or purplish cross walls), not glandular. Heads borne singly or in terminal glomerules or corymbiform arrays. Involucres turbinate-campanulate, 5–6 mm. Phyllaries in 4–5 series, usually brownish to tawny, rarely slightly rosy (opaque, shiny), ovate-lanceolate to lanceolate, glabrous. Pistillate florets (25–)30–49. Bisexual florets (1–)3–6. Cypselae ridged, papillate-roughened.


Phenology: Flowering Aug–Sep.
Habitat: Open woodlands and chaparral [wide ranging habitats in Mexico, agricultural land to oak and pine woodlands]
Elevation: 1600–2300 m

Discussion

Pseudognaphalium arizonicum is superficially similar to P. stramineum in its narrow, concolor leaves; P. stramineum has non-decurrent leaves, light yellowish phyllaries, and more pistillate and bisexual florets.

Selected References

None.

Lower Taxa

None.
Guy L. Nesom +
(A. Gray) Anderberg +
Gnaphalium arizonicum +
Arizona rabbit-tobacco +
Ariz. +, Tex. +  and w Mexico. +
1600–2300 m +
Open woodlands and chaparral [wide ranging habitats in Mexico, agricultural land to oak and pine woodlands] +
Flowering Aug–Sep. +
Compositae +
Pseudognaphalium arizonicum +
Pseudognaphalium +
species +