Flora of North America species comparison

ascending or sprawling, diffuse, 20–50 cm, pubescent [puberulent].

prostrate, ascending, or erect, diffuse, 30–100(–200) cm, pubescent, hairs sparsely uncinate.

unifoliolate;

stipules 7–20 mm;

petiole 1–2 mm;

leaflet blades: proximals usually orbiculate, broadly ovate, elliptic, or oblong, distals lanceolate or narrowly lanceolate, 0.5–5 × 0.3–2.5 cm, base subcordate, apex acute to emarginate and mucronulate, abaxial surface inconspicuously uncinulate-pubescent.

usually unifoliolate, rarely 3-foliolate;

stipules 5–30 mm;

petiole 2–17 mm;

leaflet blades oblong, obovate, or narrowly ovate to linear, 2–4.5(–6.5) × 0.2–2 cm, base obtuse or rounded, apex rounded, retuse, acute, or acuminate, abaxial surface sparsely subappressed-villous, slightly reticulate.

densely 6–20-flowered, usually terminal, racemes, 2–5(–7) cm.

6–30+-flowered, axillary, terminal, or leaf-opposed, racemes, usually 2–8 cm.

1–2 mm.

2–5 mm.

calyx 5–6 mm, tube 1.5–2 mm, lobes valvate at base (separated by sinuses), narrowly triangular, 3–4 mm, acuminate;

corolla orange or lavender-pinkish, 5–6 mm (slightly longer than calyx).

calyx 5–7 mm, tube 1–1.5 mm, lobes imbricate at base, lanceolate, 5–8 mm, acute or acuminate;

corolla white or red-blue, 6–7 mm.

dense (much crowded), internodes much shorter than loment length.

dense to lax, internodes shorter than or equal to loment length, sometimes lax proximally (5–10 mm), dense distally (to 1 mm).

brown or yellowish brown, oblong, 1.5–2.5 × 1–1.2 mm.

compressed, olive, oblong, rhombic, or 4-sided, 1.5–2.5 × 1.2–1.8 mm, 0.8–1.2 mm thick.

subterete, oblong or linear, 10–20 × 2–3 mm, much longer than calyx, margins straight, not constricted between segments, uncinulate-puberulent;

segments 3–7(or 8), broadly oblong or quadrate, 2–3 mm, lateral surfaces reticulate, obscurely sculpted;

septa furrowed between segments with internal cross partitions inside.

subterete or laterally compressed, ovoid to shortly oblong, 4–12 × 2.5–3 mm, shorter or longer than calyx, scarcely exserted from calyx, margins constricted between segments, glabrescent;

segments 1–4, globose or transversely elliptic, 1–2 × 2–2.5 mm, lateral surfaces distinctly reticulate and cross-rugose;

septa with internal cross partition between segments.

= (14) 16.

= 16.