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.

erect to ascending, green, weathering brown, gray, or stramineous, glabrous or sparsely strigose (especially at nodes);

bark deciduous, exfoliating or flaking, reddish;

axillary buds hidden in pouches, sometimes apex exposed, especially on vigorous sprout-shoots.

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 1–6 mm;

blade broadly lanceolate to broadly ovate, or narrowly to broadly elliptic, 1.5–10 × 1–5 cm, larger blades usually less than 6 × 2.5 cm, base narrowly cuneate to rounded or cordate, margins entire or irregularly to regularly serrate, crenate, or dentate, plane or slightly revolute, abaxial surface glabrous or sparsely strigose, hairs usually appressed-ascending, not twisted, main vein axils often densely strigose-tomentose, main veins sometimes sparsely strigose, secondary and tertiary veins rarely sparsely strigose, adaxial surface glabrous or sparsely to moderately strigose, especially near base and margins.

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

usually cymose racemes or cymose panicles, sometimes flowers solitary, (1–)7–49-flowered, proximal 2, 4, or 6 flowers often in axils of nearly normal to much reduced (bracteal) leaves.

0.5–3 mm.

3–8 mm, glabrous or moderately 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 glabrous or sparsely strigose, hairs scattered or concentrated on veins;

sepals ovate, ovate-lanceolate, or triangular, 5–8 × 3–5 mm, apex acute to acuminate, abaxial surface glabrous or sparsely strigose, adaxial surface glabrous except densely villous distally;

petals white, oblong, obovate, or orbiculate, 5–20(–25) × 4–15 mm;

stamens 25–40(–50);

filaments distinct, 5–11 mm;

anthers 2 × 1.5 mm;

styles 4, cylindric, 4–8 mm, connate proximally, lobes 1–4 × 0.4–0.5 mm;

stigmatic surfaces 1–3.5 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, 7–11 × 5–7 mm.

short caudate distally, 1.5–2.5 mm.

caudate, 3 mm.

= 26.