Flora of North America species comparison

developed;

roots short, fibrous, lignescent, non-tuberiferous.

not developed;

roots often long and rhizomelike, lignescent, tuberiferous.

unbranched or few-branched, 10–50 cm, faces subequal, flat to convex, angles weakly ridged, internodes glabrous, nodes sparsely hirsute, hairs eglandular.

usually several-branched distally, 20–55 cm, faces subequal, angles narrowly winged, internodes and nodes hirsute-villous, hairs gland-tipped.

petiole 0.5–1.5 mm;

blade ovate to short-elliptic or suborbiculate, 1–2 cm × 4–14 mm, margins serrate, surfaces glabrous abaxially, sparsely villous adaxially.

sessile;

blade narrowly elliptic or narrowly oblong to narrowly oblanceolate or linear, 1.5–4 cm × 1–5 mm, lateral veins relatively short or, in narrower leaves, absent, margins entire or minutely crenulate, ciliate, with gland-tipped hairs, apex sometimes apiculate, surfaces sparsely to moderately hirsute, hairs gland-tipped.

condensed, mostly obscured by foliaceous bracts.

diffuse, not obscured by bracts.

hypanthium globose, much longer than the constricted neck, 5–7(–9) mm, mostly glabrous except along calyx lobes;

calyx lobes oblong-lanceolate, apices acute, spreading-ciliate, eglandular;

petals ascending to divergent, lavender-rose, 1–2 cm;

anthers straight, 1.2–1.8 mm.

hypanthium globose, longer than the constricted neck, (4–)5–7(–8) mm, sparsely hirsute-villous, hairs gland-tipped;

calyx lobes narrowly triangular, apices acute;

petals spreading, pink to lavender-rose or purple, 1.1–1.2 cm;

anthers curved, 4–5 mm.

0.6 mm, surfaces pebbled or with ridges of domelike processes.

0.7 mm, surfaces with 3–5 prominent, broad, symmetrical or tortuous longitudinal ridges or contiguous, domelike tubercles in rows.

= 22.

= 22.