Flora of North America species comparison

1(–5), erect, usually branching only in array, moderately to densely hispido-villous.

1–5+, ascending to erect, slender, glabrous;

distal axils bearing short lateral branches with several spreading leaves.

basal and proximal cauline tapering to winged petioles, blades oblanceolate to ovate, 35–210 × 15–50 mm, margins serrate or crenate, apices acute, sparsely to moderately soft hispido-villous, more densely so on abaxial nerves;

rosettes on rhizome branches sometimes present at flowering;

mid and distal cauline sessile, blades elliptic, 15–50 × 5–15 mm, distally reduced, margins entire.

basal blades mostly linear-oblanceolate, 40–160 × 10–20 mm, smallest (10 mm) nearly spatulate, margins shallowly serrate or subentire, sometimes ciliate, ± strongly 3-nerved, apices obtuse to mostly acute, faces glabrous;

mid and distal cauline spreading to reflexed, blades linear, 15–60 × 1–4 mm, reduced to linear bracts in arrays, glabrous.

1.5–2.5 mm, hispido-villous to canescent.

1–5 mm, bracts 0–5, linear-lanceolate, 1–3 mm, distal grading into phyllaries.

campanulate, 3–5 mm.

narrowly campanulate, 3–4 mm.

7–9 (white);

laminae 3.5–4 × 1–1.5 mm.

3–7;

laminae 2–3 × ca. 0.5 mm.

9–12;

corollas 3–4 mm, lobes 0.6–1.2 mm.

5–9;

corollas 3–3.5 mm, lobes 0.5–0.8 mm.

in 3–4 series, appressed, strongly unequal, oblong, margins white, scarious, apices obtuse to rounded.

in 2–3 series, strongly unequal, oblong-lanceolate, obtuse to rounded, glabrous.

12–270 (1–15 per branch) in usually wand-shaped paniculiform arrays, of short axillary and terminal racemiform, non-secund clusters, sometimes proximal branches elongated, ascending and bearing short axillary and terminal racemiform clusters.

50–350, secund, in paniculiform arrays, openly secund-pyramidal with proximal branches spreading recurved, or as broad as long with proximal branches widely ascending, recurved (elm-tree shaped).

(narrowly obconic) 1.5–2.5 mm, smooth or with 5–8 narrow, darker, sunken striations, glabrous or sparsely strigose;

pappi 2.5–3.5 mm (sometimes strongly clavate).

(obconic) 1 mm (with several prominent ridges), glabrous or slightly hairy distally;

pappi 2–3 mm.

=18.

= 18.