Flora of North America species comparison

erect or ascending, usually flexuous and abruptly angled distal to each node, hirsute or hirsutulous.

erect or ascending, fistulose, pilose-tomentulose or white-lanate, rarely white-tomentulose.

3–10(–11) cm;

stipules lanceolate-attenuate, (1.5–)2.5–8(–9) mm, herbaceous, sometimes papery at proximal nodes;

leaflet blades obovate to elliptic, (3–)5–19 mm, apex acute to obtuse or retuse, surfaces pubescent abaxially, sometimes glabrous adaxially.

3–13(–15) cm;

stipules connate-sheathing at proximal nodes, connate or distinct at distal nodes, 3–12 mm, papery-membranous becoming scarious; mostly sessile;

leaflets (23–)27–41, blades narrowly oblong to oblong, oblong-elliptic, or linear-lanceolate, (2–)5–30 mm, apex obtuse or emarginate and apiculate, surfaces pilose-tomentulose.

10–25-flowered;

axis (1–)2–5 cm in fruit;

bracts (2.5–)4–12 mm;

bracteoles 0–2.

many-flowered, flowers declined and retrorsely imbricate in spikelike heads, 20–70(–90) × 18–23 mm;

axis 2.5–8(–9.5) cm in fruit;

bracts (1.2–)1.6–4 mm;

bracteoles 0.

erect, 1.5–5.5 cm.

erect or incurved-ascending, 2–10 cm.

0.5–2.3 mm.

0.7–1.8 mm.

12–15.3 mm;

calyx 9.5–13 mm, hirsute to hirsutulous, tube 7–8.6 mm, lobes subulate to linear-subulate, 2.5–5.5 mm;

corolla bicolored, keel tip maculate.

7–10 mm;

calyx ovoid-campanulate, 5.4–7.8 mm, villosulous, tube 3.7–5.2 mm, lobes ± subulate, 1.2–3 mm;

corolla greenish white or cream;

keel 7.1–9.1 mm.

stramineous, incurved, (20–)25–40 × (4–)5–7(–8) mm, thin becoming papery, glabrous.

deflexed or declined, green becoming stramineous or brownish, ovoid-lenticular, slightly inflated, somewhat compressed laterally, 6–11 × 3.5–6 mm, thin becoming papery, somewhat lustrous, glabrous or sparsely strigulose;

sessile.

(2 or)3–12.

= 24.