7.
Pseudognaphalium obtusifolium
(Linnaeus) Hilliard & B. L. Burtt, Bot. J. Linn. Soc. 82: 205. 1981.
Eastern rabbit-tobacco, gnaphale à feuilles obtuses
Gnaphalium obtusifolium
Linnaeus, Sp. Pl. 2: 851. 1753;
G. obtusifolium
var.
praecox
Fernald
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.
Flowering Aug—Oct. Open sites, often disturbed, roadsides, fields, pastures, open woods, in various soils, most abundantly in sand; 5—200 m; 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.
SELECTED REFERENCE
Nesom, G. L. 2001c. Notes on variation in
Pseudognaphalium
obtusifolium
(Asteraceae: Gnaphalieae). Sida 19: 615—619.
