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A stoloniferous perennial herb, usually glandular, very variable in stature and leaf size; stems simple, leafy, 1 or many in a tuft, up to c. 70 cm tall, 15 mm in diam. in marshes, under drier conditions, thin, wiry, perhaps only 6 cm tall or diffuse. Leaves correspondingly variable, up to c. 20 x 2.5(-5) cm, or as small as 1 x 0.2 cm, oblong or linear-oblong, sessile, often auriculate at the base, or the lower ones long attenuate into a petiole, green and pubescent above, usually white-felted below, sometimes glabrescent or merely glandular, margins entire, denticulate or sometimes coarsely and irregularly toothed. Heads small, c. 3 mm across, up to about 20 together in terminal corymbose clusters, 1 or a few together. Involucral bracts about equalling the flowers, glandular. Flowers white or bluish. Achenes c. 0.75 mm long, glandular. Pappus of l(-2) delicate bristles, penicillate-plumose at the tip, soon caducous.Flowers in any month.
Perennial herb, up to 0.7 m high. Leaves alternate, oblong or linear-oblong, sessile, often auriculate at base, or lower leaves petiolate; usually white-felted below, margins entire, denticulate or sometimes coarsely toothed. Capitula disciform, small, in terminal, corymbose clusters. Outer female florets filiform. Disc florets funnel-shaped, 5-lobed, white or bluish. Flowering time Oct.-July. Pappus absent in outer female florets, of 1 or 2 delicate bristles in disc florets, plumose at tip. Cypselae develop from outer female florets only, subterete, glandular. Corymbose clusters. Outer female florets filiform. Disc florets funnel-shaped, 5-lobed, white or bluish. Flowering time Oct.-July. Pappus absent in outer female florets, of 1 or 2 delicate bristles in disc florets, plumose at tip. Cypselae develop from outer female florets only, subterete, glandular.
Perennial herb, up to 0.7 m high. Leaves alternate; lower leaves petiolate; stem leaves sessile, often auriculate at base; blade oblong or linear-oblong, 10 x 2 mm or up to 200 x 50 mm, margins entire or toothed; lower surface usually white-felted. Heads disciform, small, ± 3 mm in diameter, in terminal, corymbose clusters. Involucral bracts ± biseriate, glandular. Flowers: outer female florets in many rows; disc florets functionally male; white or bluish; Aug.-Apr. Fruit with cypsela subterete, glandular. Pappus absent in female florets, in disc florets of 1 or 2 delicate bristles, plumose at tip.
Perennial herb, up to 0.7 m high. Leaves oblong or linear-oblong, sessile, often auriculate at base, or lower leaves petiolate; usually white-felted below. Heads small, in terminal corymbose clusters. Flowers white or bluish.
