Pseudognaphalium microcephalum |
Pseudognaphalium luteoalbum |
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felt-leaf everlasting, San Diego rabbit-tobacco, Wright's cudweed |
Jersey cudweed, Jersey rabbit tobacco, red-tip rabbit-tobacco, weedy cudweed |
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Habit | Perennials, (30–)50–100 cm; taprooted. | Annuals, 15–40 cm; taprooted or fibrous-rooted. |
Stems | persistently grayish tomentose, not glandular, (3–5 mm diam. near bases). |
loosely white-tomentose, not glandular. |
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 (crowded, internodes 1–5, sometimes to 10 mm) narrowly obovate to subspatulate, 1–3(–6) cm × 2–8 mm (distal smaller, oblanceolate to narrowly oblong or linear), bases subclasping, usually decurrent 1–2 mm, margins weakly revolute, faces mostly concolor to weakly bicolor, abaxial gray-tomentose, adaxial usually gray-tomentose, sometimes glabrescent, neither glandular. |
Involucres | turbinate-campanulate, 5–6 mm. |
broadly campanulate, 3–4 mm. |
Pistillate florets | 29–49. |
135–160. |
Bisexual florets | 5–9. |
5–10 (corollas red-tipped). |
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 3–4 series, silvery gray to yellowish (hyaline), ovate to ovate-oblong, glabrous. |
Heads | in loose, corymbiform arrays. |
in terminal glomerules (1–2 cm diam.). |
Cypselae | ridged, smooth to weakly papillate-roughened. |
not evidently ridged (conspicuously dotted with whitish, papilliform hairs; pappus bristles loosely coherent basally, released in clusters or easily fragmented rings). |
2n | = 28. |
= 14, 16, 28. |
Pseudognaphalium microcephalum |
Pseudognaphalium luteoalbum |
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Phenology | Flowering (Apr–)Jun–Aug(–Nov). | Flowering Apr–Oct. |
Habitat | Grassy hillsides, gravelly canyon bottoms, chaparral, coastal sage scrub | Roadsides, fields and pastures, ditches, streambanks, seasonal ponds, gardens, and other disturbed sites |
Elevation | 50–900(–1800) m (200–3000(–5900) ft) | 5–2000 m (0–6600 ft) |
Distribution |
CA; Mexico (Baja California)
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AR; AZ; CA; FL; LA; NM; NV; NY; OR; TX; UT; WA; Mexico; Europe; Asia; Africa; Pacific Islands (New Zealand); Australia [Introduced in North America]
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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 luteoalbum is native to Eurasia. It is similar in overall habit to P. stramineum but distinctive in its larger heads and red-tipped corollas (visible through the translucent phyllaries). Cypselae of P. luteoalbum have papilliform hairs; cypselae of other North American species of Pseudognaphalium are glabrous. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 19, p. 419. | FNA vol. 19, p. 418. |
Parent taxa | Asteraceae > tribe Gnaphalieae > Pseudognaphalium | Asteraceae > tribe Gnaphalieae > Pseudognaphalium |
Sibling taxa | ||
Synonyms | Gnaphalium microcephalum, Gnaphalium albidum, Gnaphalium canescens subsp. microcephalum, P. canescens subsp. microcephalum | Gnaphalium luteoalbum |
Name authority | (Nuttall) Anderberg: Opera Bot. 104: 147. (1991) | (Linnaeus) Hilliard & B. L. Burtt: Bot. J. Linn. Soc. 82: 206. (1981) |
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