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, weathering brown, gray, or stramineous, glabrous or sparsely strigose (especially at nodes);

bark deciduous, exfoliating or flaking, reddish;

axillary buds hidden in pouches, sometimes apex exposed, especially on vigorous sprout-shoots.

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 1–6 mm;

blade broadly lanceolate to broadly ovate, or narrowly to broadly elliptic, 1.5–10 × 1–5 cm, larger blades usually less than 6 × 2.5 cm, base narrowly cuneate to rounded or cordate, margins entire or irregularly to regularly serrate, crenate, or dentate, plane or slightly revolute, abaxial surface glabrous or sparsely strigose, hairs usually appressed-ascending, not twisted, main vein axils often densely strigose-tomentose, main veins sometimes sparsely strigose, secondary and tertiary veins rarely sparsely strigose, adaxial surface glabrous or sparsely to moderately 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–)7–49-flowered, proximal 2, 4, or 6 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 glabrous or sparsely strigose, hairs scattered or concentrated on veins;

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

petals white, oblong, obovate, or orbiculate, 5–20(–25) × 4–15 mm;

stamens 25–40(–50);

filaments distinct, 5–11 mm;

anthers 2 × 1.5 mm;

styles 4, cylindric, 4–8 mm, connate proximally, lobes 1–4 × 0.4–0.5 mm;

stigmatic surfaces 1–3.5 mm.

obconic to obovoid, (3–)4–7 × 3–6 mm.

obconic to obovoid, 7–11 × 5–7 mm.

not caudate, 0.9–1.2 mm.

caudate, 3 mm.

= 26.

= 26.