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.

unifoliolate;

stipules deltate-ovate, 1–2 × 1 mm, apex acute;

petiole 0.5–1.5 cm, glabrous or puberulent;

petiolules 2–3 mm, glabrous or pilose;

leaflet blades ovate to ovate-elliptic, 40–80 × 20–40 mm, base cordate to rounded, apex usually acute, sometimes acuminate or obtuse, surfaces lustrous, glabrous or lightly appressed-pubescent, hairs minute.

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.

corymbose-paniculate, axes pilose becoming glabrate;

bracts subpersistent, blade deltate, 1–2 × 1 mm, apex acute to obtuse;

bracteoles caducous, blade elliptic-ovate, to 1 mm, apex acute to obtuse.

1–1.5 mm.

1.5–2 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 4 mm, base slightly narrowed, often subsericeous, sometimes glabrate, abaxial lobe 1 mm longer than lateral lobes, adaxial lobes connate nearly to apex, longer than lateral;

corolla usually white, sometimes pinkish, 8–10 mm;

stamens 10, monadelphous;

filaments alternately long and short;

pistil glabrous.

stalk 3 mm;

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

stalk 3 mm;

ellipsoid to oblong, 15–50 × 10 mm, base cuneate to rounded, apex usually obtuse, surface lustrous, glabrous.

1.

1–4.

= 20.