Flora of North America species comparison

1–8;

bark initially reddish purple to brownish gray, becoming grayish red;

winter buds red-purple to red-brown, conic to ovoid, 8–13 mm, dull, slightly glaucous, not glutinous, sparsely or densely villous, hairs primarily rufous.

pinnately compound;

stipules persistent, sometimes deciduous, hairs rufous;

blade paler abaxially, dull blue-green, usually slightly glaucous, rarely faintly shiny adaxially, leaflets 7–13, opposite, sometimes subopposite, oblong to narrowly elliptic, sometimes oblanceolate, ovate, or obovate, 1.8–6 × 0.6–2.5 cm, l/w ratio 1.9–3.5, margins entire or finely to coarsely serrate, sometimes doubly serrate, apex obtuse or acute, surfaces soon glabrous, leaf and leaflet axils hairy, hairs rufous.

12–80-flowered, rounded, 2–8 cm diam.;

peduncles glabrous, glaucous, or sparsely to densely villous, hairs primarily rufous.

glabrous, glaucous, or sparsely to densely villous, hairs primarily rufous.

11–17 mm diam.;

hypanthium glabrous, glaucous, hypanthium plus sepals 3–4 mm;

sepals 1–2.2 mm, margins lightly to moderately ciliate, hairs rufous or whitish, infrequently glandular;

petals white, rarely pinkish, rhombic to ovate, 4–7.5 mm;

stamens 15–20;

carpels distinct, apex concave, depressed, or slightly conic and truncate, styles 3–5, 1.5–3.2 mm.

glabrous, glaucous, or villous.

pinkish red or red (often appearing slightly purplish), subglobose to broadly elliptic or obovoid, 7–13 × 7–13 mm, dull, glaucous;

sepals inconspicuous, incurved.

red-brown, ovoid to ovoid-lanceolate, oblong or elliptic, 3.4–5 × 2.2–2.9 mm, symmetric or trigonous, slightly flattened.