Flora of North America species comparison

brown, gray, or stramineous, branched, 20–40 dm, glabrous or very sparsely strigose, especially at nodes;

bark reddish, exfoliating or flaking;

branches erect to arching;

axillary buds hidden in pouches.

tan-brown, weathering gray, striate, stiffly divaricately branched, strigose-sericeous;

internodes 0.1–3.5 cm; short shoots often present;

axillary buds exposed.

petiole 1–8 mm;

blade broadly lanceolate to broadly ovate, or narrowly to broadly elliptic, (3.5–)5–12(–14) × (1.4–)2–5.3(–7) cm, herbaceous, base narrowly cuneate to rounded, margins entire or irregularly to regularly serrate, crenate, or dentate, plane, abaxial surface usually glabrous or moderately strigose, rarely moderately to densely strigose-tomentose in main vein axils, sometimes sparsely strigose on main veins, rarely sparsely strigose on secondary and tertiary veins as well, adaxial surface glabrous or very sparsely strigose, especially near base and margins.

petiole 0.5–4 mm;

blade green or gray-green abaxially and adaxially, oblong-lanceolate, linear-lanceolate, or elliptic to ovate, 0.5–1.7(–3) × 0.1–0.6(–1.1) cm, coriaceous, margins entire, ± revolute, surfaces ± equally moderately strigose, hairs appressed, coarse, 0.2–0.6(–0.9) mm, without understory of coiled-crisped hairs;

veins inconspicuous.

cymes or racemes, or flowers solitary, 1–3(–9)-flowered, proximal 2 flowers sometimes in axils of nearly normal to much reduced (bracteal) leaves, if 1-flowered, with articulation between peduncle and pedicel revealing that it is a 1-flowered cyme by reduction.

flowers solitary, produced from previous year's long shoots, often appearing axillary.

3–8 mm, glabrous or slightly strigose.

0.5–2 mm.

hypanthium usually glabrous, rarely moderately strigose;

sepals ovate or ovate-lanceolate, 7–14 × 5–8 mm, apex acuminate to acute, abaxial surface usually glabrous, rarely moderately strigose, adaxial surface glabrous except densely villosulous distally;

petals white, oblong, obovate, or orbiculate, 15–25(–30) × 10–22 mm;

stamens 60–90;

filaments distinct, 5–11 mm;

anthers 1–1.5 × 1 mm;

styles 4, connate proximally, cylindric, 10–16 mm, lobes 4–8 × 0.8–1 mm;

stigmatic surfaces 3–4.5 mm.

hypanthium sparsely to moderately strigose-sericeous or glabrous;

sepals ovate-lanceolate, 2–3.5(–4.2) × 1.3–2.3 mm, apex acute to acuminate-caudate, abaxial surface sparsely to moderately strigose-sericeous or glabrous, adaxial surface glabrous except villous along distal margins;

petals white, oblong-lanceolate to broadly oblong-ovate, (5–)7–8.5(–10) × 2.5–4.5(–5.8) mm;

stamens 13–18(–24);

filaments distinct, 1.3–4 mm;

style 1, clavate, 2–3.2 mm, narrow base 0.5–1.5 mm;

stigmatic portion 1.3–2 mm, distally lobed to 0.5 mm.

obconic to obovoid, 10–13 × 7–10 mm.

ovoid-turbinate, 3–5.5 × 3.2–5.5 mm, sepals ± persistent at distal 1/3 or more distally, capsule distal surface impressed in 4(–8) radial lines.

caudate, 2–3 mm.

not caudate, 1–1.2 mm.

= 26.