Flora of North America species comparison

1, erect, strict (slightly flexuous distally), simple, glabrous, distally ± villosulous (arrays).

1, erect, simple, straight to slightly flexuous, glabrous or sparsely villosulous proximally, increasingly villosulous distally.

cauline;

proximal withering by flowering, narrowly winged-petiolate, blades broadly oblanceolate or elliptic to obovate, smaller than mid;

mid and distal winged-petiolate (5–30 mm), broadly elliptic to oblanceolate, (70–)90–140 × 40–50(–60) mm, reduced distally, bases cuneate, with 4–5 pairs of marked veins, margins coarsely serrate (teeth 1–4 mm), slightly revolute, scabrous, apices acuminate;

abaxial faces glabrescent, adaxial sparsely pilose, mainly on veins.

basal and cauline, margins serrate, scabrous, apices usually acute, sometimes acuminate, mucronate, faces scabrous, abaxial sparsely villous to strigose with hirsute veins, adaxial strigose;

basal and proximal long-petiolate (to 120 mm), petioles not winged (or rarely so), hirsute and ciliate, blades widely ovate to ovate or lanceolate, 80–190 × 50–110 mm, bases usually cordate, subcordate, or rounded, sometimes cuneate;

cauline short-petiolate (to 50 mm) to subpetiolate or sessile (arrays), petioles gradually winged distally, blades ovate to lance-ovate, 20–60 × 8–30 mm, reduced distally, bases rounded to cuneate.

sparsely pilose;

bracts 0–1, foliaceous, remotely serrulate.

0.4–1.6 cm, villous;

bracts single or a second midway.

campanulate, 7–11 mm, shorter than pappi.

cylindro-campanulate, 10–13 mm, equaling or longer than pappi.

10–30;

corollas pale white to pale blue, 10–15 × 1.5–2 mm.

7–15;

corollas whitish to cream-colored, becoming purple, 15–20 × 1–2 mm.

10–20;

corollas yellow turning pinkish, ca. 4.5–5 mm, tubes longer than funnelform throats, lobes spreading, triangular, ca. 1.5 mm.

20–25;

corollas yellow, slightly ampliate, 6.5–8.5 mm, tubes longer than funnelform throats, lobes ± reflexed, lanceolate, 1–1.2 mm.

32–36 in 4–5 series, broadly oblong, strongly unequal, scarious, dark green zones wide, from 1/2 distally, margins hyaline, narrow, erose, densely ciliate, apices appressed or often slightly squarrose, obtuse to subacute, faces glabrous, eglandular.

36–50 in 4–5 series, ovate, elliptic, or lanceolate to linear (outer 3 × 1.5 mm, inner 13 × 0.7 mm), strongly unequal, bases indurate, green zones ± lanceolate to linear along midnerves (inner), 1/4–3/4 width, subapical (rarely outer foliaceous), margins hyaline, erose, ciliate, apices squarrose, acute to long-acuminate (inner hyaline), abaxial faces ± villosulous, adaxial glabrous.

1–10, borne singly or in corymbiform arrays.

4–80 in flat-topped, corymbiform arrays.

tan, fusiform, cylindric, 5–6 mm, ribs 7–11, stramineous, faces ± strigose;

pappi of pale stramineous (clavate) bristles 5–7 mm, shorter than to ± equaling disc corollas.

brown, fusiform, ± compressed, 3–4 mm, ribs 7–9, tan, prominent, crowded, faces strigillose;

pappi of cinnamon (sometimes ± clavate) bristles, ± equaling disc corollas.

= 54.

= 54.