Flora of North America species comparison

unifoliolate;

stipules lanceolate, 10 × 2 mm, apex acuminate;

petiole 0.4–0.6 cm, puberulent to sericeous;

petiolules 3–5 mm, puberulent;

leaflet blades elliptic to ovate, (25–)50–80 × (20–)50–80 mm, base rounded to subcordate, apex abruptly narrowed to obtuse tip, surfaces sometimes discolorous, sublustrous, subsericeous, becoming moderately appressed-pubescent or glabrous.

racemose in fascicles, axes pilose;

bracts caducous, blade deltate, 1 × 0.5 mm, apex acute;

bracteoles subpersistent, blade deltate-ovate, 1 × 0.3–0.5 mm, apex acute.

subcymose or paniculate, axes puberulent;

bracts caducous, blade obovate, 2 × 0.5–1 mm, apex truncate or obtuse;

bracteoles caducous, blade elliptic, 2 × 1 mm, apex subacute.

1–1.5 mm.

0.2–0.7 mm.

calyx 3–3.5 mm, base rounded, pilose or subsericeous, lobes subequal, barely distinct from tube, deltate;

corolla usually white, sometimes pinkish, 8–9 mm;

stamens 10, monadelphous or diadelphous (5 + 5);

filaments nearly equal;

pistil glabrous.

calyx 3–5 mm, base rounded, puberulent, abaxial lobe usually 2 mm longer than lateral lobes, adaxial lobes rounded, connate nearly to apex;

corolla creamy white to yellowish, 8–10 mm;

stamens 9, monadelphous;

filaments alternately long and short;

pistil puberulent.

stalk 3 mm;

subglobose to subreniform, 20–35 × 15–20 mm, base rounded, apex rounded, surface sericeous becoming appressed-pubescent or glabrescent.

stalk 5–6 mm; narrowly ellipsoid to oblong, 40–100 × 6–15 mm, base attenuate to cuneate, apex acute to rounded, surface sublustrous to reticulate, glabrous.

1.

1 or 2(–4).

= 20.

= 20.