Flora of North America species comparison

erect, sometimes suckering, angled, glabrous or finely stellate-hairy.

5–20, ascending to erect, branches erect proximally, somewhat sinuous;

bark buff to reddish brown or black, usually peeling in narrow strips; short shoots present;

buds superposed, each with ca. 5 exposed brown scales.

stipules linear to narrowly elliptic, 4 × 0.5–2 mm;

petiole 1–2(–3) cm;

blade broadly ovate to obovate, (3–)4–8 cm, usually as wide as long, base rounded to truncate or slightly cordate, 3- or 5-lobed, margins irregularly crenate to doubly serrate, apex obtuse to acute, abaxial surface paler, glabrous or more densely stellate-hairy, adaxial glabrous or sparsely stellate-hairy.

deciduous, cauline;

stipules caducous, decurrent on stem, leaving oblique, broadly ovate to rectangular stubs, linear or oblong to narrowly ovate, obovate, or elliptic, sometimes rhombic, margins sometimes remotely glandular-dentate, surfaces sparsely stellate-hairy (glabrous adaxially in P. monogynus);

petiole present;

blade broadly ovate to obovate or orbiculate, 0.5–10 cm, membranous, margins flat, crenate to doubly crenate or doubly dentate, 3–5(–7)-lobed, rarely almost unlobed, 3–5(–7)-veined, surfaces glabrous or sparsely to densely stellate-hairy.

30–50-flowered, dense, hemispheric racemes, 3 cm diam., sometimes compound with some proximal pedicels becoming secondary peduncles;

bracts narrowly elliptic to spatulate, 4 × 2 mm, apex acute or erose-dentate, faces glandular.

terminal or axillary on leafy short shoots, 5–50-flowered, open to dense corymb- or umbel-like pedunculate racemes;

bracts present;

bracteoles absent.

1–1.5 cm, densely stellate-hairy.

present.

5–8 mm diam.;

hypanthium cup-shaped, 2 mm, densely stellate-hairy;

sepals pale green to white, darker in center, triangular, 2–3 mm, apex gland-tipped, surfaces densely stellate-hairy;

petals white, broadly elliptic to orbiculate, 3–4 × 3–4 mm;

stamens equal to or exceeding petals;

carpels 3–5, connate basally, mostly glabrous, sometimes hairy (on ventral suture).

5–12 mm diam.;

hypanthium cup-shaped to campanulate, 1.5–3 mm, exterior stellate-hairy;

sepals 5, ascending to slightly reflexed, triangular to ovate;

petals 5, white to pale pink, broadly obovate, elliptic, or orbiculate, base short-clawed, sometimes irregularly toothed or notched;

stamens 20–40, shorter than, equal to, or exceeding petals;

carpels 1–5;

styles slender, stigmas capitate;

ovules 2–5.

aggregated follicles, sometimes solitary, 1–5, ovoid, often ± inflated, slightly flattened, size not recorded, splitting along both sutures;

hypanthium persistent;

sepals persistent, ascending to slightly reflexed.

2(–5), pyriform, 2.3–2.8 mm.

1(–5), shiny yellow, carunculate.

3–5, connate basally, shiny brown, ovoid, 5–7 mm (lengths slightly exceeding sepals), glabrous;

styles 2.5–3 mm.

= 9.

= 18.