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.

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.

usually opposite, sometimes whorled [alternate], simple;

stipules absent;

petiole present or absent;

blade sometimes palmately lobed, margins entire, serrate, serrulate, dentate, denticulate, or crenate;

venation pinnate or acrodromous (Fendlera, Fendlerella, Philadelphus, Whipplea).

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

terminal or axillary, cymes, panicles, racemes, or corymbs, or flowers solitary.

2–11 mm, moderately to densely 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.

bisexual [unisexual], or sometimes marginal ones sterile, radially symmetric (bisexual ones) or bilaterally symmetric with enlarged petaloid sepals (sterile ones);

perianth and androecium nearly hypogynous, perigynous, or epigynous;

hypanthium completely adnate to ovary or adnate to ovary proximally, free distally;

sepals 4–12, distinct or connate basally;

petals 4–12, connate basally [entirely, then calyptrate];

nectary usually present, rarely absent;

stamens 8–200, usually distinct, sometimes connate proximally, free;

anthers dehiscing by longitudinal slits;

pistil 1, 2–12-carpellate, ovary less than 1/2 inferior, 1/2 inferior, or completely inferior, 1–12-locular, placentation usually axile proximally, parietal distally, rarely strictly axile or parietal;

ovules 1–50 per locule, anatropous;

styles 1–12, distinct or connate proximally to most of length;

stigmas (1–)2–12.

capsules [berries], dehiscence septicidal, loculicidal, interstylar, or intercostal.

obconic to obovoid, (3–)4–7 × 3–6 mm.

not caudate, 0.9–1.2 mm.

1–50 per locule, funicular appendage present (Fendlerella, Whipplea) or absent.

= 26.