Flora of North America species comparison

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Pseudognaphalium microcephalum

Pseudognaphalium micradenium

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

delicate rabbit-tobacco, Weatherby's rabbit-tobacco
Habit Perennials, (30–)50–100 cm; taprooted. Annuals (fragrant), 15–60 cm; taprooted or fibrous-rooted.
Stems

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

glandular-puberulent (without persistent tomentum), stipitate glands 0.1–0.2 mm, stalks narrower than 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 linear to linear-lanceolate or linear-oblanceolate, 1.5–5.5 cm × 1.5–10 mm, bases not clasping, not decurrent, margins flat, faces bicolor, abaxial white to gray, tomentose, adaxial green, both minutely stipitate-glandular.
Involucres

turbinate-campanulate, 5–6 mm.

turbinate-campanulate, 5–6 mm.
Pistillate florets

29–49.

47–78.
Bisexual florets

5–9.

(7–)11–20.
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 to tawny white (hyaline, shiny), narrowly ovate to oblong, glabrous.
Heads

in loose, corymbiform arrays.

in corymbiform arrays.
Cypselae

ridged, smooth to weakly papillate-roughened.

ridged, smooth.
2n

= 28.

Pseudognaphalium microcephalum

Pseudognaphalium micradenium
Phenology Flowering (Apr–)Jun–Aug(–Nov). Flowering Sep–Oct.
Habitat Grassy hillsides, gravelly canyon bottoms, chaparral, coastal sage scrub Dry woods and openings, roadsides
Elevation 50–900(–1800) m (200–3000(–5900) ft) 10–600 m (0–2000 ft)
Distribution
from FNA
CA; Mexico (Baja California)
[WildflowerSearch map]
from FNA
GA; IN; KY; MA; MD; ME; MI; MN; MO; NC; NH; NJ; NY; PA; SC; TN; VA; WI
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 micradenium has a more northern and Appalachian distribution than P. helleri. A report of P. micradenium for Louisiana probably was based on specimens of P. helleri. The two species differ in vestiture and other features; stems of P. micradenium are more slender than those of its close relatives.

(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. helleri, P. jaliscense, P. leucocephalum, P. luteoalbum, P. macounii, 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 obtusifolium var. micradenium, Gnaphalium helleri var. micradenium, P. helleri subsp. micradenium
Name authority (Nuttall) Anderberg: Opera Bot. 104: 147. (1991) (Weatherby) G. L. Nesom: Sida 19: 618. (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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