Flora of North America species comparison

first erect (greenish proximally; usually single, simple), then producing herbaceous, leafy, prostrate runners (usually with rooting plantlets at tips, populations often becoming clonal mats), strigose (often sparsely; hairs antrorsely appressed, consistent in orientation), sometimes slightly glandular distally.

usually decumbent-ascending, sometimes nearly erect, sparsely to densely white-villous (hairs loose, thin, often crinkly) or sparsely hispido-pilose (hairs usually stiff, spreading, sometimes antrorsely ascending or appressed; var. viscidulus), usually densely minutely glandular at least distally, sometimes eglandular or obscurely glandular (var. viscidulus).

basal (often persistent) and cauline;

basal blades broadly oblanceolate to elliptic, 20–55 × 3–9 mm;

cauline abruptly reduced distally, margins entire or dentate, faces strigose, eglandular.

cauline;

blades narrowly oblong to oblanceolate, 10–25 × 1–5 mm, usually even-sized, margins entire, ciliate, faces sparsely to densely villous to hirsuto-villous, usually densely minutely glandular, sometimes eglandular or obscurely glandular (var. viscidulus).

3–5 × 6–13 mm.

5.5–7(–8) × 8–12 mm.

40–125;

corollas white, often with an abaxial midstripe, often drying lilac, 4–10 mm, laminae not coiling or reflexing.

0.

2–3.5 mm.

4–6 mm (throats slightly indurate, not inflated).

in 2–3 series, strigose to loosely hirsute, minutely glandular.

in 3–5 series (sometimes purplish apically), usually glabrous, sometimes with spreading hairs, densely glandular.

1(–3, on proximal branches).

(discoid) (1–)2–5(–10) in corymbiform arrays.

0.8–1.3 mm, 2-nerved, faces sparsely strigose;

pappi: outer of setae, inner of 10–17 bristles.

(2–)2.5–3 mm, 2-nerved, glabrous;

pappi: outer of setae, inner of 22–30(–35) bristles.

or short-lived perennials, 3–15 cm; usually fibrous-rooted, sometimes taprooted, caudices lignescent, rarely branched.

= 18, 27, 36, 45, 54.