Flora of North America species comparison

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Pseudognaphalium viscosum

sticky rabbit-tobacco, wing cudweed
Habit Annuals (viscid and unpleasantly aromatic), 30–100 cm; taprooted.
Stems

persistently white-tomentose and stipitate-glandular.
Leaf

blades (crowded, internodes mostly 1–3, sometimes to 10, mm) linear-lanceolate, (2–)4–8 cm × 3–10 mm, bases not clasping, usually (at least the proximal) decurrent 3–10 mm, margins strongly revolute to revolute-undulate, faces bicolor, abaxial densely white-tomentose, adaxial densely stipitate-glandular.
Involucres

campanulate, 5–6 mm.
Pistillate florets

200–250.
Bisexual florets

(13–)16–29.
Phyllaries

in 5–6 series, tawny-silvery to silvery white (hyaline, shiny), ovate-lanceolate (not keeled or thickened along midribs, not apiculate), glabrous.
Heads

in corymbiform arrays.
Cypselae

not ridged, papillate-roughened.
2n

= 28.

Pseudognaphalium viscosum
Phenology Flowering Jul–Sep.
Habitat Rocky open sites, roadsides
Elevation 1400–1800 m (4600–5900 ft)
Distribution
from FNA
TX; Mexico; Central America
[WildflowerSearch map]
[BONAP county map]
Discussion

Reports of Pseudognaphalium viscosum from the flora for states other than Texas are based on plants of P. macounii. Pseudognaphalium viscosum is similar to P. leucocephalum, which has broader and white-opaque phyllaries, longer bisexual corollas, and smooth cypselae.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 19, p. 422.
Parent taxa Asteraceae > tribe Gnaphalieae > Pseudognaphalium
Sibling taxa
P. arizonicum, P. austrotexanum, P. beneolens, P. biolettii, P. californicum, P. canescens, P. helleri, P. jaliscense, P. leucocephalum, P. luteoalbum, P. macounii, P. micradenium, P. microcephalum, P. obtusifolium, P. pringlei, P. ramosissimum, P. roseum, P. saxicola, P. stramineum, P. thermale
Synonyms Gnaphalium viscosum
Name authority (Kunth) Anderberg: Opera Bot. 104: 148. (1991)
Web links 
Unless otherwise noted, all data comes from the online version of the Flora of North America, who have made most of their content available via a Creative Commons license (CC BY 4.0).



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