Pseudognaphalium viscosum |
Pseudognaphalium obtusifolium |
|
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sticky rabbit-tobacco, wing cudweed |
blunt-leaf rabbit-tobacco, eastern rabbit-tobacco, gnaphale à feuilles obtuses, old field balsam, rabbit-tobacco |
|
Habit | Annuals (viscid and unpleasantly aromatic), 30–100 cm; taprooted. | Annuals or winter annuals (sometimes faintly fragrant), (10–)30–100 cm; taprooted. |
Stems | persistently white-tomentose and stipitate-glandular. |
white-tomentose, sometimes lightly so, usually not glandular, rarely glandular near bases. |
Leaf | blades (crowded, internodes mostly 1–3, sometimes to 10, mm) linear-lanceolate, (2–)4–8 cm × 3–10 mm, bases not clasping, usually (at least the proximal) decurrent 3–10 mm, margins strongly revolute to revolute-undulate, faces bicolor, abaxial densely white-tomentose, adaxial densely stipitate-glandular. |
blades linear-lanceolate to elliptic or oblanceolate, 2.5–10 cm × 2–10 mm (relatively even-sized), bases not clasping, not decurrent, margins flat, faces bicolor, abaxial white-tomentose, adaxial green, usually glabrous or slightly glandular, sometimes with persistent light tomentum. |
Involucres | campanulate, 5–6 mm. |
broadly campanulate, 5–7 mm. |
Pistillate florets | 200–250. |
38–96. |
Bisexual florets | (13–)16–29. |
4–8(–11). |
Phyllaries | in 5–6 series, tawny-silvery to silvery white (hyaline, shiny), ovate-lanceolate (not keeled or thickened along midribs, not apiculate), glabrous. |
in 4–6 series, white (opaque, usually shiny, sometimes dull), ovate to ovate-oblong, glabrous or tomentose (bases). |
Heads | in corymbiform arrays. |
in corymbiform (sometimes rounded to elongate) arrays. |
Cypselae | not ridged, papillate-roughened. |
ridged, smooth. |
2n | = 28. |
|
Pseudognaphalium viscosum |
Pseudognaphalium obtusifolium |
|
Phenology | Flowering Jul–Sep. | Flowering Aug–Oct. |
Habitat | Rocky open sites, roadsides | Open sites, often disturbed, roadsides, fields, pastures, open woods, in various soils, most abundantly in sand |
Elevation | 1400–1800 m (4600–5900 ft) | 5–200 m (0–700 ft) |
Distribution |
TX; Mexico; Central America
|
AL; AR; CT; DE; FL; GA; IA; IL; IN; KS; KY; LA; MA; ME; MI; MN; MO; MS; NC; NE; NH; NY; OH; OK; PA; RI; SC; TN; TX; VA; VT; WI; WV; NB; NS; ON; PE; QC
|
Discussion | Reports of Pseudognaphalium viscosum from the flora for states other than Texas are based on plants of P. macounii. Pseudognaphalium viscosum is similar to P. leucocephalum, which has broader and white-opaque phyllaries, longer bisexual corollas, and smooth cypselae. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
|
Source | FNA vol. 19, p. 422. | FNA vol. 19, p. 420. |
Parent taxa | Asteraceae > tribe Gnaphalieae > Pseudognaphalium | Asteraceae > tribe Gnaphalieae > Pseudognaphalium |
Sibling taxa | ||
Synonyms | Gnaphalium viscosum | Gnaphalium obtusifolium, Gnaphalium obtusifolium var. praecox |
Name authority | (Kunth) Anderberg: Opera Bot. 104: 148. (1991) | (Linnaeus) Hilliard & B. L. Burtt: Bot. J. Linn. Soc. 82: 205. (1981) |
Web links |