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.

1–8;

bark dark gray;

winter buds red to brown, shiny, conic, 5–12 mm, slightly glutinous, sparsely hairy except along scale margins and apex, hairs 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 often persistent, margins rufous-hairy;

blade pale abaxially, shiny, green adaxially, leaflets 7–9(–11), opposite or subopposite, oblong to elliptic, sometimes narrowly elliptic, 2.5–4.1(–4.5) × 0.9–2 cm, l/w ratio 2.1–2.6, margins finely to coarsely serrate, sometimes doubly serrate, apex obtuse to acute, surfaces soon glabrous, leaflet axils and petiole bases hairy, hairs rufous.

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

peduncles whitish-villous.

25–120+-flowered, rounded, 3–11 cm diam.;

peduncles glabrous or sparsely hairy.

whitish-villous.

glabrous or sparsely hairy; fruiting pedicels essentially glabrous.

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.

9–10 mm diam.;

hypanthium glabrous, hypanthium plus sepals 3 mm;

sepals 0.7–1.5 mm, margins ciliolate, hairs whitish, irregularly glandular;

petals white, broadly ovate, 3–4 mm;

stamens 20;

carpels distinct, apex conic, styles 3 or 4, 1.5–2 mm.

sparsely whitish-villous.

glabrous or nearly so.

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

lenticels abundant;

sepals inconspicuous, incurved.

bright red, globose to subglobose, 6–9 mm diam., shiny if glaucous layer is rubbed off;

sepals inconspicuous, incurved.

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

red-brown, lanceolate, 4 × 2 mm, slightly asymmetric, slightly flattened.

= 34, 68 (Europe).