Flora of North America species comparison

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Pseudognaphalium microcephalum

Pseudognaphalium austrotexanum

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

South Texas rabbit-tobacco, Texas rabbit-tobacco
Habit Perennials, (30–)50–100 cm; taprooted. Annuals, 30–70 cm; taprooted.
Stems

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

densely and closely white-tomentose-floccose, glabrescent, not 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 to linear-lanceolate, 2–5 cm × 1–3 mm, bases subclasping, not decurrent, margins strongly revolute, sometimes closely sinuate, faces bicolor, abaxial densely and closely white-tomentose, adaxial green, densely stipitate-glandular, otherwise glabrate.
Involucres

turbinate-campanulate, 5–6 mm.

broadly campanulate, 4.5–5 mm.
Pistillate florets

29–49.

[46–]76–102.
Bisexual florets

5–9.

(6–)8–11.
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 5–7 series, silvery white (hyaline, shiny), narrowly ovate to oblong or elliptic (apices of inner thickened and slightly raised along midribs, apiculate), glabrous.
Heads

in loose, corymbiform arrays.

in corymbiform arrays.
Cypselae

ridged, smooth to weakly papillate-roughened.

ridged, papillate-roughened.
2n

= 28.

Pseudognaphalium microcephalum

Pseudognaphalium austrotexanum
Phenology Flowering (Apr–)Jun–Aug(–Nov). Flowering Oct–Dec(–Jan).
Habitat Grassy hillsides, gravelly canyon bottoms, chaparral, coastal sage scrub Sandy soil in pastures, grasslands, open disturbed sites
Elevation 50–900(–1800) m (200–3000(–5900) ft) 0–10[–600] m (0–0[–2000] ft)
Distribution
from FNA
CA; Mexico (Baja California)
[WildflowerSearch map]
from FNA
TX; Mexico (Nuevo León)
[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.)

Pseudognaphalium austrotexanum is similar to P. viscosum in general appearance: taprooted annuals with stems white-tomentose, strictly erect, and mostly unbranched proximal to heads, leaves linear to linear-lanceolate, strongly bicolor (green and glandular adaxially, white-tomentose abaxially), loosely to strictly ascending, crowded on relatively short internodes and continuing to immediately proximal to the heads, and basally subclasping but not strongly auriculate, phyllaries silvery white, thin, and hyaline, and cypselae minutely papillate-roughened.

(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. 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, P. viscosum
Synonyms Gnaphalium microcephalum, Gnaphalium albidum, Gnaphalium canescens subsp. microcephalum, P. canescens subsp. microcephalum
Name authority (Nuttall) Anderberg: Opera Bot. 104: 147. (1991) G. L. Nesom: Sida 19: 507, fig. 1. (2001)
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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