Flora of North America species comparison

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Pseudognaphalium microcephalum

Pseudognaphalium viscosum

felt-leaf everlasting, San Diego rabbit-tobacco, Wright's cudweed

sticky rabbit-tobacco, wing cudweed
Habit Perennials, (30–)50–100 cm; taprooted. Annuals (viscid and unpleasantly aromatic), 30–100 cm; taprooted.
Stems

persistently grayish tomentose, not glandular, (3–5 mm diam. near bases).

persistently white-tomentose and stipitate-glandular.
Leaf

blades narrowly oblanceolate, 2–5(–8) cm × 5–10(–18) mm (gradually smaller distally, becoming lanceolate), bases not clasping, not decurrent, margins flat, faces weakly bicolor, tomentose (adaxial less densely), not glandular.

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

turbinate-campanulate, 5–6 mm.

campanulate, 5–6 mm.
Pistillate florets

29–49.

200–250.
Bisexual florets

5–9.

(13–)16–29.
Phyllaries

in 4–5 series, white (opaque, dull), ovate to oblong-ovate (inner narrower, all usually with filiform but definitely thickened keel and slight apiculum), tomentose (at least bases).

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

in loose, corymbiform arrays.

in corymbiform arrays.
Cypselae

ridged, smooth to weakly papillate-roughened.

not ridged, papillate-roughened.
2n

= 28.

= 28.

Pseudognaphalium microcephalum

Pseudognaphalium viscosum
Phenology Flowering (Apr–)Jun–Aug(–Nov). Flowering Jul–Sep.
Habitat Grassy hillsides, gravelly canyon bottoms, chaparral, coastal sage scrub Rocky open sites, roadsides
Elevation 50–900(–1800) m (200–3000(–5900) ft) 1400–1800 m (4600–5900 ft)
Distribution
from FNA
CA; Mexico (Baja California)
[WildflowerSearch map]
from FNA
TX; Mexico; Central America
[WildflowerSearch map]
[BONAP county map]
Discussion

Pseudognaphalium microcephalum is characterized by stems commonly stiffly erect and slightly zigzag distally, relatively thick (3–5 mm diam. near bases), and closely grayish tomentose, leaves oblanceolate, sessile, sometimes clasping, not decurrent, and weakly bicolor, and heads usually in open, corymbiform arrays.

(Discussion copyrighted by Flora of North America; reprinted with permission.)

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. 419. FNA vol. 19, p. 422.
Parent taxa Asteraceae > tribe Gnaphalieae > Pseudognaphalium 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. obtusifolium, P. pringlei, P. ramosissimum, P. roseum, P. saxicola, P. stramineum, P. thermale, P. viscosum
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 microcephalum, Gnaphalium albidum, Gnaphalium canescens subsp. microcephalum, P. canescens subsp. microcephalum Gnaphalium viscosum
Name authority (Nuttall) Anderberg: Opera Bot. 104: 147. (1991) (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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