Flora of North America species comparison

prostrate to decumbent, to 1(–1.5) m, sericeous and sparingly hirsute with white or yellow antrorse hairs, becoming glabrate.

decumbent to ascending, to 1 m, densely sericeous with white hairs and hispid with white or yellow antrorse hairs, rarely becoming glabrate.

obovate in outline, 1–6 × 1.5–5 cm;

stipules 3–5 × 1 mm;

leaflets 6–8(–12), broadly oblong to elliptic, 5–29 × 3–14 mm, terminal pair usually largest, surfaces appressed-hirsute to glabrate, veins and margins sericeous.

elliptic in outline, 1.5–7 × 2–3 cm;

stipules 4–10 × 1–2 mm;

leaflets 8–16(–20), elliptic to slightly obovate, 8–25 × 2–3 mm, middle pairs largest, surfaces appressed-hirsute, veins and margins sericeous, becoming glabrate.

10–50 mm in flower and fruit, at first shorter than subtending leaves, equaling them or longer in fruit, little thickened distally, straight or curved.

30–105 mm in flower and fruit, longer than subtending leaves (extending flowers well above herbage), slightly thickened distally, sharply bent at base and straight distally.

7–25 mm diam.;

sepals persistent, ovate, 3–8 × 2–3 mm, as long as or little shorter than petals, in flower as long as style, in fruit clasping but not entirely covering mature fruit body and shorter than beak, only scarious margins becoming involute, hirsute;

petals marcescent, usually ± 2-colored, basally usually white to yellow-green or green, rarely red (often brighter than distal portion), fading white to bright orange, distally white to yellow or pale orange, obovate, 5–12 × 4–10 mm;

stamens as long as style;

anthers yellow or red-orange, usually ovoid, rarely linear, 1 mm;

ovary ovoid, 1 mm, usually glabrous, sometimes strigose at base, rarely to base of style;

style cylindric but slightly conic basally, 2–3 mm, 2–3 times as long as ovary, glabrous;

stigma terminal.

20–60 mm diam.;

sepals persistent, lanceolate, 6–16 × 1.5–2.5 mm, 1/2 as long as petals, in flower longer than style, in fruit much surpassing mature fruit body but shorter than beak, also shriveling and turning brown, margins becoming strongly involute making sepals appear linear, hispid and strigose;

petals marcescent, 2-colored, basally green to red, distally white to yellow or bright orange, fading white to orange, broadly obovate, 10–34 × 7–22 mm;

stamens as long as style;

anthers red, orange, rarely yellow (same color as petal base), ovoid or oblong, rarely linear, 2–3 mm;

ovary ovoid, 2–3 mm diam., hairy;

style cylindric but slightly conic basally, 6–8 mm, 2–3 times as long as ovary, strigose at base or to stigma base;

stigma terminal.

ovoid, 5–6 mm diam., usually glabrous, sometimes strigose at base or rarely to base of beak;

beak cylindric, 3–7 mm, usually as long as fruit body, base widely conic, glabrous;

mericarps 3–4 × 1 mm, abaxially tuberculate, cross-ridged, or slightly keeled, tubercles if present all rounded, less than 1 mm, sides pitted, adaxial edge angled.

ovoid, 4–5 mm diam., strigose;

beak cylindric, 6–18 mm, 3 times as long as fruit body, base conic, strigose at base or to stigma base;

mericarps 3.5 × 1 mm, abaxially tuberculate, all tubercles rounded, less than 1 mm, sides slightly pitted, adaxial edge angled.