Flora of North America species comparison

several from base, erect to decumbent, (unbranched, stout, densely leafy sterile shoots sometimes present), (0.5–)4–2.5 dm.

few or several from base, prostrate to decumbent, (unbranched or branched), 0.5–1.5 dm.

(clustered at stem base);

blade linear to linear-oblanceolate, 2–5 cm, margins entire, usually involute, sometimes flattened, (apex obtuse to subacute).

blades orbicular to broadly obovate, 1.5–3 cm, margins usually entire, rarely remotely dentate.

blade linear-oblanceolate to linear, 1–3.5(–4.5) cm, margins entire, usually involute.

(sessile or shortly petiolate);

blade elliptic to oblanceolate, 1–1.5(–2.5) cm, margins entire, (apex obtuse).

compact, (often nearly subumbellate).

dense, (elongated in fruit).

sepals (yellowish or greenish yellow), ovate or oblong, 4.5–7.5(–9) mm, (lateral pair sometimes cucullate, median pair tapering at both ends, thickened apically, cucullate);

petals spatulate or oblong, 6.5–10.5(–15) mm, (base sometimes widened, apex rounded or retuse).

sepals ovate or oblong-elliptic, 5–5.5 mm, (lateral pair not saccate);

petals cuneate or broadly obovate, ca. 7 mm, (sometimes slightly narrowed to a broad claw, apex sometimes retuse).

(often expanded distally, ascending or recurved, usually straight or slightly curved, rarely nearly sigmoid), 4–15 mm, (stout).

(sharply recurved), 5–10 mm, (stout).

(sessile or substipitate), subglobose to slightly ovoid, usually inflated, rarely compressed or obcompressed, 4–6(–10) mm, (apex acute, slightly flattened);

valves sparsely pubescent, trichomes appressed;

ovules (8–)12–16(–20) per ovary;

style (2–)3–4.5(–5.5) mm.

subglobose to broadly obovoid, strongly inflated (often slightly angustiseptate), 5–7 mm, (papery);

valves sparsely pubescent; (septum fenestrate, perforate, or obsolete);

ovules 4–8 per ovary;

style 2–3 mm.

flattened.

somewhat flattened.

= 18, 20, 36.