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.

spreading, green to yellowish, weathering grayish and striate, divaricately branched, moderately to sparsely strigose-sericeous;

internodes 1.5–5.5 cm (long shoots), 0.2–2.2 cm (lateral branches);

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 2–4.5(–8) mm;

blade grayish or whitish abaxially, green adaxially, usually narrowly lanceolate to lance-ovate, sometimes ovate, (1–)1.6–3.3(–4.7) × (0.4–)0.5–1.1(–2.3) cm, ± herbaceous, margins usually entire, rarely sparsely serrulate, plane, sometimes drying revolute, abaxial surface densely and loosely strigose, hairs arched-twisted, 0.3–1.2 mm, with or without understory of coiled-crisped, slender hairs between raised veins, adaxial surface sparsely to moderately strigose, hairs antrorsely appressed, 0.4–0.9 mm, 1–3 hairs per mm of width.

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.

3–8 mm, glabrous or slightly strigose.

1–2(–4) mm, loosely strigose or glabrous.

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 loosely strigose or glabrous;

sepals ovate to ovate-lanceolate, 2.5–5.5 × 1–2.5 mm, apex obtuse to long acuminate-caudate, abaxial surface loosely strigose or glabrous, adaxial surface glabrous except ciliate and villous along distal margins;

petals white, oblong-ovate to ovate, 8–10(–14) × 3.5–5(–10.5) mm, margins entire to undulate, apex obtuse to notched;

stamens (11–)14–16(–24);

filaments distinct, 1–4.7 mm;

style 1, clavate, 1.9–3(–3.5) mm, slender base 0.5–2 mm;

stigmatic portion obovoid, 1.2–1.7 × 1.1 mm.

obconic to obovoid, 10–13 × 7–10 mm.

turbinate-spheroid, 3.5–5.5 × 3.5–5 mm, sepals at distal 1/3, tardily falling, capsule distal surface smooth or impressed in 4 vertical lines.

caudate, 2–3 mm.

short-caudate distally, 1–1.2 mm.

= 26.