11.
Antennaria plantaginifolia
(Linnaeus) Hooker, Fl. Bor.-Amer. 1: 330. 1834.
Plantain-leaved pussytoes, antennaire à feuilles de plantain
Gnaphalium plantaginifolium
Linnaeus, Sp. Pl. 2: 850. 1753;
Antennaria caroliniana
Rydberg;
A. decipiens
Greene;
A. denikeana
B. Boivin;
A. nemoralis
Greene;
A. pinetorum
Greene;
A. plantaginifolia
var.
petiolata
(Fernald) A. Heller
Dioecious. Plants
6.5—20(—25) cm.
Stolons
2.5—7.5 cm (mostly ascending when young).
Basal leaves
(petiolate) 3—5(—7)-nerved, obovate to suborbiculate, 35—75 × 15—35 mm, tips minutely mucronate, abaxially tomentose, adaxially green-glabrescent to gray-pubescent.
Cauline leaves
linear, 6.5—35 mm, distal flagged.
Heads
4—17(—30) in tight corymbiform arrays.
Involucres:
staminate 5—7(—8) mm; pistillate 5—7 mm.
Phyllaries
distally white.
Corollas:
staminate 2—3.5 mm; pistillate 3—4 mm.
Cypselae
0.5—1.6 mm, slightly papillate;
pappi:
staminate 2.5—4 mm; pistillate 3.5—5.5 mm.
2
n
= 28.
Flowering mid—late spring. Dry, open, deciduous woodlands, tops of banks, ridges, and bluffs, sandstone formations, slopes in openings in woodlands; 0—1500 m; Man., N.B., N.S., Que.; Ala., Ark., Conn., Del., Fla., Ga., Ill., Ind., Iowa, Ky., Maine, Md., Mass., Minn., Miss., Mo., N.H., N.J., N.Y., N.C., Okla., Pa., R.I., S.C., Tenn., Vt., Va., W.Va., Wis.
Antennaria plantaginifolia
is a diploid progenitor of the
A.
parlinii
complex and is similar to that species except for smaller heads and adaxially gray-pubescent basal leaves (R. J. Bayer and G. L. Stebbins 1982; Bayer 1985b; Bayer and D. J. Crawford 1986). It is a diploid ancestor of the
A. howellii
complex. It is found in the Appalachian region; disjunct populations occur in the driftless area of Wisconsin and Minnesota (Bayer and Stebbins).
