Flora of North America species comparison

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Pseudognaphalium microcephalum

Pseudognaphalium helleri

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

Heller's cudweed, Heller's rabbit-tobacco
Habit Perennials, (30–)50–100 cm; taprooted. Annuals (fragrant), 30–100 cm; fibrous-rooted (roots relatively thick and lignescent).
Stems

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

greenish, glandular-villous (without persistent tomentum, stipitate glands mostly 0.3–1 mm, often variable, stalks broadened toward bases, about equaling gland widths).
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 mostly oblong-lanceolate, 2.5–7 cm × 4–20 mm, bases not clasping, not decurrent, margins flat, faces bicolor, abaxial white to gray with lightly persistent tomentum, adaxial green, both minutely stipitate-glandular.
Involucres

turbinate-campanulate, 5–6 mm.

campanulate, 6–7 mm.
Pistillate florets

29–49.

83–107.
Bisexual florets

5–9.

9–15.
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 4–6 series, white (opaque, shiny), ovate to ovate-oblong or oblong, ± tomentose.
Heads

in loose, corymbiform arrays.

in corymbiform arrays.
Cypselae

ridged, smooth to weakly papillate-roughened.

ridged, smooth.
2n

= 28.

Pseudognaphalium microcephalum

Pseudognaphalium helleri
Phenology Flowering (Apr–)Jun–Aug(–Nov). Flowering Sep–Oct(–Nov).
Habitat Grassy hillsides, gravelly canyon bottoms, chaparral, coastal sage scrub Dry woods and openings, clay and sandy clay, sand hills
Elevation 50–900(–1800) m (200–3000(–5900) ft) 10–300 m (0–1000 ft)
Distribution
from FNA
CA; Mexico (Baja California)
[WildflowerSearch map]
from FNA
AL; AR; FL; GA; LA; MS; NC; OK; SC; TN; TX; VA
[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.)

Pseudognaphalium helleri and P. micradenium are similar to P. obtusifolium in most features; both differ in their glandular stems without the persistent whitish tomentum of P. obtusifolium.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 19, p. 419. FNA vol. 19, p. 421.
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. 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 Gnaphalium helleri, Gnaphalium obtusifolium var. helleri
Name authority (Nuttall) Anderberg: Opera Bot. 104: 147. (1991) (Britton) Anderberg: Opera Bot. 104: 147. (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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