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Pseudognaphalium thermale
(E.E.Nelson) G.L.Nesom
Family:
Asteraceae
[
Gnaphalium williamsii
,
more
Pseudognaphalium microcephalum var. thermale
(E.E. Nelson) Dorn
]
FNA
Resources
Guy L. Nesom in Flora of North America (vol. 19, 20 and 21)
Perennials,
(20-)30-70 cm; taprooted.
Stems
loosely tomentose, not glandular.
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.
Heads
in loose to dense, corymbiform to paniculiform arrays.
Involucres
turbinate-campanulate, (4-)5-6 mm.
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.
Pistillate florets
35-55.
Bisexual florets
(2-)4-7.
Cypselae
ridged, densely papillate-roughened.
Flowering Jun-Sep(-Oct). 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; (50-)300-2300(-2500) m; Alta., B.C.; Calif., Idaho, Mont., Nev., Oreg., Utah, Wash., Wyo.
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