Pseudognaphalium obtusifolium

(Linnaeus) Hilliard & B. L. Burtt

Bot. J. Linn. Soc. 82: 205. 1981.

Common names: Eastern rabbit-tobacco gnaphale à feuilles obtuses
IllustratedEndemic
Basionym: Gnaphalium obtusifolium Linnaeus Sp. Pl. 2: 851. 1753
Synonyms: Gnaphalium obtusifolium var. praecox Fernald
Treatment appears in FNA Volume 19. Treatment on page 420. Mentioned on page 415, 416, 421.

Annuals or winter-annuals (sometimes faintly fragrant), (10–) 30–100 cm; taprooted. Stems white-tomentose, sometimes lightly so, usually not glandular, rarely glandular near bases. Leaf-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. Heads in corymbiform (sometimes rounded to elongate) arrays. Involucres broadly campanulate, 5–7 mm. Phyllaries in 4–6 series, white (opaque, usually shiny, sometimes dull), ovate to ovate-oblong, glabrous or tomentose (bases). Pistillate florets 38–96. Bisexual florets 4–8 (–11). Cypselae ridged, smooth.


Phenology: Flowering Aug–Oct.
Habitat: Open sites, often disturbed, roadsides, fields, pastures, open woods, in various soils, most abundantly in sand
Elevation: 5–200 m

Distribution

V19-686-distribution-map.gif

N.B., N.S., Ont., P.E.I., Que., Ala., Ark., Conn., Del., Fla., Ga., Ill., Ind., Iowa, Kans., Ky., La., Maine, Mass., Mich., Minn., Miss., Mo., Nebr., N.H., N.Y., N.C., Ohio, Okla., Pa., R.I., S.C., Tenn., Tex., Vt., Va., W.Va., Wis.

Discussion

Lower Taxa

None.
white +  and gray +
white-tomentose +
glandular +  and glabrous +
truncate-penicillate;truncate +
scarious +
mostly ovate +  and lanceovate or linear +
indeterminate +  and determinate +
Guy L. Nesom +
(Linnaeus) Hilliard & B. L. Burtt +
not decurrent +
Gnaphalium obtusifolium +
compound +  and simple +
mostly narrowly lanceolate;oblanceolate +
5-ribbed +, 3-ribbed +  and 2-ribbed +
muriculate +, papillate +  and smooth +
Eastern rabbit-tobacco +  and gnaphale à feuilles obtuses +
actinomorphic +
N.B. +, N.S. +, Ont. +, P.E.I. +, Que. +, Ala. +, Ark. +, Conn. +, Del. +, Fla. +, Ga. +, Ill. +, Ind. +, Iowa +, Kans. +, Ky. +, La. +, Maine +, Mass. +, Mich. +, Minn. +, Miss. +, Mo. +, Nebr. +, N.H. +, N.Y. +, N.C. +, Ohio +, Okla. +, Pa. +, R.I. +, S.C. +, Tenn. +, Tex. +, Vt. +, Va. +, W.Va. +  and Wis. +
5–200 m +
papillate-roughened +
winged +  and beaked +
dispersed +
Open sites, often disturbed, roadsides, fields, pastures, open woods, in various soils, most abundantly in sand +
singly +  and aggregated +
indeterminate +
homogamous +  and heterogamous +
each +  and sessile +
0.3 cm3 mm <br />0.003 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
campanulate +
0.5 cm5 mm <br />0.005 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
2.5 cm25 mm <br />0.025 m <br /> (10 cm100 mm <br />0.1 m <br />) +
linear-lanceolate;elliptic or oblanceolate +
cauline +  and basal +
rarely lanceovate +  and lanceolate +
2-carpellate +
persistent +
Flowering Aug–Oct. +
tomentose +  and glabrous +
Bot. J. Linn. Soc. +
bearing subulate enations +, hairy +  and bristly +
conic;more or less columnar +
nesom2001a +
4 +  and 6 +
exalbuminous +
Illustrated +  and Endemic +
decumbent +  and procumbent +
white-tomentose +
appendaged +  and truncate +
papillate +
Gnaphalium obtusifolium var. praecox +
Pseudognaphalium obtusifolium +
Pseudognaphalium +
species +
10 cm100 mm <br />0.1 m <br /> (30 cm300 mm <br />0.3 m <br />) +
winter-annual +  and annual +
30 cm300 mm <br />0.3 m <br /> (100 cm1,000 mm <br />1 m <br />) +
shrub +  and subshrub +