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Pseudognaphalium stramineum (Kunth) W.A. Weber  
Family: Asteraceae
Cotton-Batting-Plant, more...cottonbatting plant, cudweed, annual cudweed, cotton cudweed, cottonbatting cudweed
[Gnaphalium berlandieri, moreGnaphalium chilense Spreng., Gnaphalium chilense var. confertifolium Greene, Gnaphalium gossypinum Nutt., Gnaphalium lagopodioides , Gnaphalium proximum , Gnaphalium stramineum Kunth, Gnaphalium sulphurescens Rydb.]
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Max Licher
  • FNA
  • SW Field Guide
  • Gleason & Cronquist
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Guy L. Nesom in Flora of North America (vol. 19, 20 and 21)
Annuals or biennials, 30-60(-80) cm; taprooted. Stems (1+ from base, erect to ascending) loosely tomentose, not glandular. Leaf blades (crowded, internodes usually 1-5, sometimes to 10 mm) oblong to narrowly oblanceolate or subspatulate, 2-8(-9.5) cm × 2-5(-10) mm (smaller distally, narrowly lanceolate to linear), bases subclasping, usually not decurrent, sometimes decurrent 1-2 mm, margins flat or slightly revolute, faces concolor, loosely and persistently gray-tomentose, not glandular. Heads in terminal glomerules (1-2 cm diam.). Involucres subglobose, 4-6 mm. Phyllaries in 4-5 series, whitish (often yellowish with age, hyaline, shiny), ovate to oblong-obovate, glabrous. Pistillate florets 160-200. Bisexual florets [8-]18-28. Cypselae weakly, if at all, ridged (otherwise smooth or papillate-roughened, glabrous, without papilliform hairs; pappus bristles loosely coherent basally, released in clusters or easily fragmented rings). 2n = 28. Flowering Mar-Oct. Sandy fields, streamsides, washes, swales, dunes, chaparral slopes, roadsides, fields, disturbed places, moist disturbed places; 10-1600 m; B.C.; Ariz., Calif., Colo., Idaho, Mont., Nebr., Nev., N.Mex., N.Y., N.C., Okla., Oreg., S.C., Tex., Utah, Va., Wash., Wyo.; Mexico; South America. Pseudognaphalium stramineum is probably native from South America to western North America; it is adventive in sandy fields on the Atlantic coastal plain, where it flowers May-Aug.

FNA 2006, Kearney and Peebles 1969, McDougall 1973
Duration: Annual Nativity: Native Lifeform: Forb/Herb General: Annual to biennial herbs, to 60 cm tall; stems 1 or a few per plant, simple or branching above; herbage closely covered with a greenish or yellowish tomentum (covering of matted wooly hairs). Leaves: Alternate and crowded on the stems; upper leaves with decurrent bases (leaf bases extending downward along the stem), lower leaves with winged petioles; blades 2-8 cm long, 3-15 mm wide, gray-tomentose on both sides, the margins entire and flat or slightly revolute (curling). Flowers: Flower heads discoid, arranged in dense glomerules, 1-2 cm across, at branch tips; involucre (ring of bracts wrapped around flower head) almost spherical, 4-6 mm high, the bracts (phyllaries) strongly overlapping in 4-5 series, membraneous, whitish, often yellowish with age, and shiny with obtuse tips; florets all discs, the corollas evenly yellowish. Fruits: Achenes brownish, smooth, less than 1 mm long; topped with a pappus of bristles, 5-6 mm long, these distinct from each other and released in clusters or easily fragmented rings. Ecology: Found along streams, sandy fields, washes, swales, dunes, chaparral slopes, roadsides, fields, and disturbed places,below 5,500 ft (1676 m); flowers May-October. Distribution: Most of western N. Amer., from B.C., CAN south to CA and east to NE, OK and TX; south to s MEX. Notes: Look for this species under Gnaphalium chilense in older texts. Good identifiers for P. stramineum are the decurrent leaves nearly the same color on both sides; the flower heads 4-6 mm high with obtuse-tipped phyllaries and yellowish corollas (corollas never red or purple-tipped as in P. luteoalbum and Gamochaeta purpurea and G. stagnalis). Ethnobotany: A hot poultice of the leaves or stems was applied to parts of the body swollen or affected by pain, the plant used as a ceremonial emetic, and the leaves were chewed for fun. Etymology: Pseudognaphalium is false gnaphalium, the former genus name, while stramineum means straw colored. Synonyms: Gnaphalium chilense, G. chilense var. confertifolium, G. stramineum Editor: LCrumbacher 2011, FSCoburn 2015
Vascular plants of NE US and adjacent Canada
The mainly western sp. G. stramineum Kunth is casually intr. in our range, as on the coast of Va. It has basally adnate-auriculate, not at all glandular lvs and very numerous (commonly 150-200+) fls per head, 8-20(-26) of them perfect. (G. chilense)

Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.

©The New York Botanical Garden. All rights reserved. Used by permission.
Pseudognaphalium stramineum
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Max Licher
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Max Licher
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Sue Carnahan
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Max Licher
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Max Licher
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Patrick Alexander
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Sue Carnahan
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Sue Carnahan
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Jillian Cowles
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Jack Dash
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Development supported by National Science Foundation Grants (DBI 9983132, BRC 0237418, DBI 0743827, DBI 0847966)
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