Pseudognaphalium stramineum |
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cotton-batting cudweed, cotton-batting false cudweed, cotton-batting-plant |
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Habit | 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. |
Involucres | subglobose, 4–6 mm. |
Pistillate florets | 160–200. |
Bisexual florets | [8–]18–28. |
Phyllaries | in 4–5 series, whitish (often yellowish with age, hyaline, shiny), ovate to oblong-obovate, glabrous. |
Heads | in terminal glomerules (1–2 cm diam.). |
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. |
Pseudognaphalium stramineum |
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Phenology | Flowering Mar–Oct. |
Habitat | Sandy fields, streamsides, washes, swales, dunes, chaparral slopes, roadsides, fields, disturbed places, moist disturbed places |
Elevation | 10–1600 m (0–5200 ft) |
Distribution |
AZ; CA; CO; ID; MT; NC; NE; NM; NV; NY; OK; OR; SC; TX; UT; VA; WA; WY; BC; Mexico; South America
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Discussion | 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. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 19, p. 418. |
Parent taxa | Asteraceae > tribe Gnaphalieae > Pseudognaphalium |
Sibling taxa | |
Synonyms | Gnaphalium stramineum, Gnaphalium chilense, Gnaphalium chilense var. confertifolium, Gnaphalium gossypinum, Gnaphalium lagopodioides, Gnaphalium proximum, Gnaphalium sulphurescens |
Name authority | (Kunth) Anderberg: Opera Bot. 104: 148. (1991) |
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