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.

erect, sparsely piloso-hispid (hairs spreading), sometimes strigose distally, eglandular.

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.

basal (usually withering by flowering) and cauline;

basal blades mostly lanceolate to oblanceolate or ovate, 15–80 × 3–20 mm, margins coarsely serrate to nearly entire, faces sparsely strigoso-hirsute, eglandular;

cauline lanceolate to oblong, little reduced proximal to midstem.

3–5 × 6–13 mm.

3–5 × 6–12 mm.

40–125;

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

80–125;

corollas white, 4–10 mm, laminae tardily coiling.

2–3.5 mm.

2–2.8 mm.

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

in 2–3(–4) series, sparsely villous or hirsuto-villous, minutely glandular.

1(–3, on proximal branches).

ca. 5–50+ in loosely paniculiform or corymbiform arrays.

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

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

0.8–1 mm, 2-nerved, faces sparsely strigose;

pappi: outer minute crowns of setae or narrow scales, inner 0 (rays) or of 8–11 bristles (disc).

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

= 18, 27, 36, 45, 54.

= 27.