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northwestern rabbit-tobacco, slender cudweed, slender false cudweed, small head cudweed, Wright's cudweed

Pringle's cudweed, Pringle's rabbit-tobacco

Habit Perennials, (20–)30–70 cm; taprooted. Annuals or perennials, 30–80 cm; taprooted.
Stems

loosely tomentose, not glandular.

lightly white-tomentose and/or glabrescent and green, minutely stipitate- or sessile-glandular beneath other induments.

Leaf

blades narrowly oblanceolate, 3–8 cm × 3–6 mm (gradually smaller distally, becoming linear), bases not clasping, decurrent 5–14 mm, margins flat, faces concolor, loosely tomentose, sessile-glandular beneath tomentum.

blades (not crowded, internodes mostly 5+ mm) oblanceolate-spatulate to obovate- or petiolate-spatulate, 5–10 cm × 10–20 mm (distal oblong to lanceolate or oblanceolate, 2–8 cm, slightly smaller), bases not clasping and decurrent 3–20 mm or clasping and decurrent 1–3 mm or not decurrent at all, margins flat to slightly revolute, faces bicolor, abaxial thinly white-tomentose, adaxial minutely stipitate- or sessile-glandular, otherwise glabrous or glabrate (bases of hairs persistent, enlarged).

Involucres

turbinate-campanulate, (4–)5–6 mm.

campanulate to turbinate, 3.5–4 mm.

Pistillate florets

35–55.

15–40(–64).

Bisexual florets

(2–)4–7.

(1–)2–6.

Phyllaries

in 3–4(–5) series, whitish (hyaline or opaque, usually shiny, sometimes dull), ovate to ovate-oblong (outer broadly acute, inner rounded-apiculate), glabrous.

in 2–3 series, silvery white to tawny, oblong to oblong-ovate, (hyaline, shiny), glabrous.

Heads

in loose to dense, corymbiform to paniculiform arrays.

in loose, corymbiform arrays.

Cypselae

ridged, densely papillate-roughened.

ridged, papillate-roughened.

Pseudognaphalium thermale

Pseudognaphalium pringlei

Phenology Flowering Jun–Sep(–Oct). Flowering (Aug–)Sep–Nov.
Habitat Dry, sandy road banks, roadside ditches, streambeds and banks, lakeshores, granitic sand, open woods of yellow pine, Jeffrey pine, red fir, Douglas fir, mixed conifer, and mixed evergreen Rock outcrops and slopes, crevices and thin soil on cliffs, oak or oak-pine woodlands
Elevation (50–)300–2300(–2500) m ((200–)1000–7500(–8200) ft) 1500–2300 m (4900–7500 ft)
Distribution
from FNA
CA; ID; MT; NV; OR; UT; WA; WY; AB; BC
[WildflowerSearch map]
from FNA
AZ; NM; TX; Mexico (Chihuahua, Durango, Sonora)
[BONAP county map]
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. microcephalum, P. obtusifolium, P. pringlei, P. ramosissimum, P. roseum, P. saxicola, P. stramineum, 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. ramosissimum, P. roseum, P. saxicola, P. stramineum, P. thermale, P. viscosum
Synonyms Gnaphalium thermale, Gnaphalium canescens subsp. thermale, Gnaphalium johnstonii, Gnaphalium microcephalum var. thermale, Gnaphalium microcephalum subsp. thermale, P. canescens subsp. thermale, P. microcephalum var. thermale Gnaphalium pringlei
Name authority (E. E. Nelson) G. L. Nesom: Sida 21: 781. (2004) (A. Gray) Anderberg: Opera Bot. 104: 147. (1991)
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