Flora of North America species comparison

usually several, erect, unbranched or sparingly branched distally, villous with septate hairs, thinly arachnoid-tomentose, fistulose proximal to heads.

short-villous and thinly arachnoid, ± glabrate, resin-gland-dotted;

basal and proximal cauline petiolate, blades oblanceolate to narrowly ovate, 10–30 cm, margins entire or shallowly dentate;

cauline sessile, shortly decurrent, not much smaller except those crowded proximal to heads, blades lanceolate to ovate, 5–10 cm, entire, often ± undulate, apices acute.

ovoid to hemispheric, 25–35 mm.

many;

corollas yellow;

corollas of sterile florets slightly expanded, ca. 4 mm;

corollas of disc florets ca. 3.5 mm.

bodies pale green or stramineous, ovate or broadly lanceolate, glabrous, appendages erect to spreading, brown, scarious, abruptly expanded, 1–2 cm wide, ± covering phyllary bodies, lacerate fringed, sometimes tipped by weak spines 1–2 mm, glabrous.

disciform or weakly radiant, borne singly, sessile, closely subtended by clusters of reduced leaves.

7–8 mm;

pappi of many setiform scales (“flattened bristles”), 5–8 mm.

= 18 (Russia).