Flora of North America species comparison

copper to reddish brown, stiffly to loosely branched, appressed villous-sericeous, ± strigose, hairs often red-gland based, or glabrous;

epidermis soon or tardily deciduous exposing cortex and striate bundle caps;

bark grayish;

internodes (0.1–)1–2.5(–6) cm; short-shoot spurs not present;

axillary buds hidden in pouches.

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.

petiole 1–2(–4) mm;

blade greenish or whitish abaxially, green adaxially, linear-lanceolate, narrowly ovate to ovate, (0.5–)0.8–3(–5.5) × (0.2–)0.3–1.3(–3.3) cm, herbaceous to coriaceous, margins usually entire, rarely sparsely serrulate, plane or revolute upon drying, abaxial surface short sericeous-strigose, or sericeous-villous with longer hairs, or with ascending to erect hairs, sometimes with dense to moderate understory of slender curled hairs, adaxial surface glabrous, glabrate, ± sericeous-strigose, villous, or with erect hairs.

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.

usually solitary flowers, sometimes 3–5-flowered cymes.

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.

0.5–3 mm.

3–8 mm, glabrous or slightly strigose.

hypanthium glabrous, sericeous-strigose basally or throughout, or weakly to densely villous to densely lanate with mixed strigose and villous vestiture, with understory of slender curled hairs;

sepals ovate to lanceolate, (2.5–)4–8.5(–10) × (2.5–)3–4.3(–5) mm, apex acute to acuminate-caudate, abaxial surface glabrous, sericeous-strigose, or weakly to densely villous to densely lanate with mixed strigose and villous vestiture, with understory of slender curled hairs, adaxial surface glabrous except villous along distal margins;

petals white [marked purple near base], oblong-obovate to broadly ovate, (5.8–)7–16(–21) × (5.3–)6–11(–15) mm, margins entire or erose-undulate, apex ± acute, rounded, or notched;

stamens 26–64;

filaments often connivent-connate in irregular clusters in proximal 0.5–4 mm, 1.8–8 mm, of unequal length, glabrous;

anthers yellowish, 0.7–1.2 mm;

styles 4, connate proximally, cylindric, 2.5–5.5(–7) mm, lobes sometimes connate proximally in pairs, 0.5–2.5 mm;

stigmatic surfaces extending from adaxial lobes onto abaxial lobes and down to cylindric style.

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.

oblong-globose or globose-turbinate, (3.6–)5–8(–9.5) × (3.5–)4–7(–9.5) mm, sepals persisting at equator or more distally, capsule distal surface often impressed in 4(–8) radiating lines.

obconic to obovoid, 10–13 × 7–10 mm.

short caudate distally, 1.5–2.5 mm.

caudate, 2–3 mm.

= 26.