Flora of North America species comparison

1;

bark gray;

winter buds green to brown, ovoid to ovoid-oblong, 5–10 mm, scales dark-margined, shiny, glutinous, glabrous, ciliate, or villous.

1–4+;

bark gray to bronze;

winter buds green to purple, shiny, ovoid to conic, 7–20 mm, glutinous, glabrous or hairy along scale margins and at apex, hairs primarily rufous.

simple;

stipules early deciduous, whitish-villous;

blade slightly shiny, green to dark green adaxially, ovate to broadly elliptic, 5.5–10.5 × 3–8 cm, margins deeply 1–4 subpalmately lobed, lobes ± triangular, (1–)1.5–2.5 cm wide, basal sinuses deepest, margins finely serrate, secondary veins in 4–6 main pairs, apex acute to acuminate, abaxial surface thinly white-hairy to glabrate, adaxial glabrous.

pinnately compound;

stipules early deciduous, rufous-ciliate, margins sometimes glandular;

blade paler abaxially, dull green to yellowish green adaxially, leaflets 11–17, opposite, lanceolate to oblong-lanceolate, 5–10 × 1–2.5 cm, l/w ratio 3.4–5, margins serrulate to serrate, at least in apical 1/2 and often almost to base, apex acuminate to long acuminate, surfaces glabrous or glabrate at flowering, some hairs occasionally persisting abaxially along midvein;

leaflet axils and petiole bases glabrous or with rufous and/or whitish hairs adaxially.

15–60+-flowered, rounded, 3–17.5 cm diam.;

peduncles whitish-villous.

125–400+-flowered, flat-topped or rounded, 6–15 cm diam.;

peduncles glabrous or sparsely villous.

whitish-villous.

glabrous or sparsely villous.

10–17 mm diam.;

hypanthium densely villous, hypanthium plus sepals 5.5–7.5 mm;

sepals 1.5–3.5 mm, margins villous and prominently glandular, glands often relatively thick;

petals white, elliptic, broadly elliptic, or broadly ovate, 4–7 mm;

stamens 20;

carpels adnate to hypanthium, apex conic, styles 2, 3.5–4 mm.

5–7.5(–8.5) mm diam.;

hypanthium glabrous, hypanthium plus sepals 2–2.5 mm;

sepals 0.5–1 mm, margins entire, often with a few thick glands;

petals white, orbiculate to obovate, (2–)2.5–3.5(–4) mm;

stamens 14–20;

carpels 1/2 adnate to hypanthium, apex conic, styles 3 or 4, 1.5–2 mm.

sparsely whitish-villous.

glabrous or sparsely villous.

brown, narrowly obovoid, 15–19 × 10–13 mm, dull, not glaucous;

lenticels abundant;

sepals inconspicuous, incurved.

bright red to orange-red, globose to subglobose, 4–7 mm diam., shiny, not glaucous;

sepals inconspicuous, incurved.

brown, oblong-lanceoloid, 8.1 × 3.4 mm, slightly asymmetric, slightly flattened.

brown, yellowish when fresh or immature, ovoid to ovoid-lanceoloid, 2.5–3.3 × 1.5–2 mm, asymmetric, slightly flattened.

= 34, 68 (Europe).

= 34.