Flora of North America species comparison

erect, virgate, branched.

petiole 1–4 mm, pubescent;

blade usually ovate to elliptic, sometimes oblanceolate, 1–4(–5) × 1–2 cm, membranous, base obtuse, margins serrulate, usually from near base to apex, sometimes only distally from middle, rarely nearly entire with few teeth apically, venation pinnate cladodromous, secondary veins not prominent, apex acute to obtuse, abaxial surface lanate to glabrescent, adaxial glabrate.

alternate, simple or pinnately compound;

stipules absent;

venation pinnate, sometimes palmate.

mostly axillary, usually hemispheric panicles, sometimes simple fascicles, 3–6-flowered, sessile, 2–3 × 1–3 cm;

bractlets 3–7 × 3–5 mm;

branches pubescent.

10–30 mm, pubescent.

5–15 mm diam.;

hypanthia campanulate, 1–1.2 mm, abaxial surface glabrous or sparsely hairy, adaxial glabrous;

sepals ovate to ovate-triangular, 1–3 mm;

petals white to cream, often with more than a single whorl of petals in most commonly escaped form, ovate to obovate, 2–10 mm;

staminodes 10–16, irregularly fused;

stamens 20–25, 0.5 times petal length.

perianth and androecium perigynous;

epicalyx bractlets absent or present;

hypanthium shallowly bowl-shaped, hemispheric, campanulate, patelliform, +/- crateriform, or turbinate;

torus absent, minute, or thickened;

carpels 3–5(or 6)[–8], distinct, free or adnate to hypanthium base, styles +/- terminal, distinct;

ovules 2–5, apical, collateral or clustered.

aggregated follicles or achenes (Holodiscus);

styles deciduous or persistent, not elongate.

oblanceoloid, 1.5–2 mm, glabrous, adaxial suture sparsely hairy.

= 18.