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.

erect to ascending, green, older stems gray, glabrous or sparsely strigose or villous, especially at nodes;

bark tight, not exfoliating or flaking, gray;

branches erect;

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 1–12(–20) mm;

blade broadly lanceolate to broadly ovate, or narrowly to broadly elliptic, (3–)5–10(–16) × 1.6–7(–11) cm, base narrowly cuneate to rounded, margins entire or irregularly to regularly serrate, crenate, or dentate, plane, abaxial surface moderately to densely strigose or tomentose to villous, hairs twisted, main vein axils and main veins often more densely strigose-tomentose, 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.

usually cymose racemes or cymose panicles, sometimes flowers solitary, (1–)5–9-flowered, proximal 2 or 4 flowers often in axils of nearly normal to much reduced (bracteal) leaves.

2–11 mm, moderately to densely strigose.

3–8 mm, glabrous or moderately 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 sparsely to densely strigose or villous;

sepals ovate, ovate-lanceolate, or triangular, 5–8 × 3–5 mm, apex acute to acuminate, abaxial surface moderately to densely strigose or villous, adaxial surface densely villous distally;

petals white, oblong, obovate, or orbiculate, 12–21 × 8–12 mm;

stamens 25–50;

filaments distinct, 5–11 mm;

anthers 1.5 × 1 mm;

styles 4, connate proximally, cylindric, 6–10 mm, lobes 1.5–5 × 0.4–0.7 mm;

stigmatic surfaces 1.5–4 mm.

obconic to obovoid, (3–)4–7 × 3–6 mm.

obconic to obovoid, 6–11 × 4–7 mm.

not caudate, 0.9–1.2 mm.

caudate, 3–4 mm.

= 26.

= 26.