Flora of North America species comparison

brown, gray, or stramineous, branched, glabrous to densely strigose;

bark deciduous, exfoliating or flaking, reddish;

branches sprawling;

axillary buds exposed.

brown, gray, or stramineous, branched, 20–40 dm, glabrous or very sparsely strigose, especially at nodes;

bark reddish, exfoliating or flaking;

branches erect to arching;

axillary buds hidden in pouches.

petiole 1–9 mm;

blade white or gray abaxially, green adaxially, broadly lanceolate to broadly ovate or narrowly to broadly elliptic, 2–8 × 1–5.5 cm, herbaceous, base narrowly cuneate to rounded, margins entire or irregularly to regularly serrate, crenate, or dentate, plane, abaxial surface slightly to densely loosely strigose, hairs often gently curved or arched-twisted, 0.7–1.5 mm, adaxial surface glabrate to moderately strigose, hairs usually evenly distributed, when sparse, sometimes distributed mainly along major veins, 0.2–0.8 mm, either thick-based and tightly antrorsely appressed or less thick-based, longer and looser, similar to abaxial hairs.

petiole 1–8 mm;

blade broadly lanceolate to broadly ovate, or narrowly to broadly elliptic, (3.5–)5–12(–14) × (1.4–)2–5.3(–7) cm, herbaceous, base narrowly cuneate to rounded, margins entire or irregularly to regularly serrate, crenate, or dentate, plane, abaxial surface usually glabrous or moderately strigose, rarely moderately to densely strigose-tomentose in main vein axils, sometimes sparsely strigose on main veins, rarely sparsely strigose on secondary and tertiary veins as well, adaxial surface glabrous or very sparsely strigose, especially near base and margins.

cymes or cymose racemes, or flowers solitary, 1–3(–5)-flowered, proximal 2(–4) flowers often in axils of leaves or bracts.

cymes or racemes, or flowers solitary, 1–3(–9)-flowered, proximal 2 flowers sometimes in axils of nearly normal to much reduced (bracteal) leaves, if 1-flowered, with articulation between peduncle and pedicel revealing that it is a 1-flowered cyme by reduction.

2–11 mm, moderately to densely strigose.

3–8 mm, glabrous or slightly strigose.

hypanthium glabrous or densely strigose, hairs tightly or loosely appressed;

sepals ovate-lanceolate or triangular, 3–6 × 2–4 mm, apex acuminate, abaxial surface sparsely to densely strigose, adaxial surface glabrous except densely villous distally;

petals white, oblong, obovate, or orbiculate, 5–13 × 4–13 mm;

stamens 14–35;

filaments distinct, 3–9 mm;

anthers 1 × 0.7 mm;

style 1, clavate, 4–6 mm;

stigmatic portion 2–3 mm.

hypanthium usually glabrous, rarely moderately strigose;

sepals ovate or ovate-lanceolate, 7–14 × 5–8 mm, apex acuminate to acute, abaxial surface usually glabrous, rarely moderately strigose, adaxial surface glabrous except densely villosulous distally;

petals white, oblong, obovate, or orbiculate, 15–25(–30) × 10–22 mm;

stamens 60–90;

filaments distinct, 5–11 mm;

anthers 1–1.5 × 1 mm;

styles 4, connate proximally, cylindric, 10–16 mm, lobes 4–8 × 0.8–1 mm;

stigmatic surfaces 3–4.5 mm.

obconic to obovoid, (3–)4–7 × 3–6 mm.

obconic to obovoid, 10–13 × 7–10 mm.

not caudate, 0.9–1.2 mm.

caudate, 2–3 mm.

= 26.

= 26.