Flora of North America species comparison

erect;

twigs glabrous or puberulent.

terete.

deciduous;

blade elliptic-oblong to elliptic, ovate, or obovate, ± chartaceous, margins irregularly compound-serrate or serrulate, especially distally, or entire (sometimes fringed with elongate hairs, especially when juvenile or on stump sprouts), plane, surfaces multicellular elongate-hairy (hairs stout) on midvein (rarely also secondary veins) abaxially, sometimes such hairs also on midvein and lamina adaxially, or such hairs absent, and ± sparsely unicellular-hairy on both surfaces of midvein or such hairs absent;

venation brochidodromous.

blades turning red in autumn, 5.5–23.5 × 2–8 cm, base cuneate to rounded, apex acute to acuminate.

terminal panicles composed of arching-declinate racemes or secondary panicles, 15–50-flowered, (borne on shoots of current season).

bracteoles 2, medial or distal.

sepals 5, connate slightly to 1/2 their lengths, lanceolate;

petals 5, connate ca. 3/4 their lengths, white, corolla urceolate to cylindric-urceolate, lobes much shorter than tube, (densely unicellular-hairy, hairs short to elongate, crisped to straight);

stamens 10, slightly exserted;

filaments straight, flat, hairy, without spurs;

anthers without awns, dehiscent by slitlike pores, with white line of disintegration tissue on each lobe abaxially;

pistil 5-carpellate;

ovary 5-locular;

stigma capitate-truncate.

calyx lobes 1–2 × 0.7–1.4 mm;

corolla 4–7 × 2.5–5.5 mm;

filaments 2–3.5 mm;

anthers with locules narrowed distally, tubulelike;

style strongly impressed into apex of ovary.

capsular, ovoid, (with very slightly thickened sutures), dry.

3.5–8.5 × 2–4 mm, unicellular-hairy;

placentae basal.

25–100, narrowly oblong, (tailed);

testa cells elongate.

= 12.

= 24.