Flora of North America species comparison

bark ± smooth to furrowed;

twigs multicellular eglandular-hairy (hairs unbranched) and unicellular-hairy.

bark smooth to vertically furrowed, shredding;

twigs scattered, multicellular eglandular-hairy (hairs unbranched) or such hairs ± absent, otherwise glabrous or sparsely unicellular-hairy.

deciduous;

petiole multicellular eglandular- and stipitate-glandular-hairy and unicellular-hairy;

blade narrowly elliptic or ovate to obovate, 2–9 × 0.8–3 cm, thin, membranous to chartaceous, margins minutely serrate, plane, ciliate when young, eglandular- and stipitate-glandular-hairy, apex acute to ± rounded, surfaces scattered eglandular-hairy, ± glabrescent.

deciduous;

petiole multicellular eglandular-hairy and unicellular-hairy;

blade ovate to obovate, 3–9(–12.5) × 1.4–3.8(–5) cm, thin, membranous, margins entire, plane, ciliate, eglandular-hairy, often strikingly so, apex acute to obtuse, often mucronate, abaxial surface often glabrous or, sometimes, sparsely unicellular-hairy, sometimes sparsely eglandular-hairy, adaxial surface sometimes scattered eglandular-hairy, otherwise glabrous or, sometimes, sparsely unicellular-hairy.

lateral (axillary, i.e., above leaf scars, spaced along shoots of previous year), fasciculate, 1–2-flowered;

bracts similar to bud scales.

6–15-flowered;

bracts similar to bud scales.

to 9–15 mm, eglandular- and stipitate-glandular-hairy.

4–19 mm, eglandular-hairy, otherwise glabrous or sparsely unicellular-hairy.

± radially symmetric, opening soon after (and borne below) expanded leaves, pendulous, very fragrant (similar to vanilla and jasmine);

calyx lobes 5–17 mm, eglandular- and stipitate-glandular-hairy, margins glandular-hairy;

corolla white, rarely marked with yellow, bowl-shaped, 9–22 mm, minutely unicellular-hairy or glabrous on outer surface, petals connate, lobes 6–15 mm, tube expanding into lobes, 3–9 mm;

stamens 9(–12), included, ± unequal, 5.5–14 mm.

opening before or with leaves, erect to horizontal, slightly fragrant;

calyx lobes 0.5–2.5(–4) mm, surfaces and margins scattered, eglandular- and/or, rarely, stipitate-glandular-hairy, otherwise glabrous or moderately unicellular-hairy;

corolla deep pink to white with pink tube, without blotch on upper lobe, funnelform, 23–45 mm, scattered, multicellular eglandular-hairy and/or, less commonly, multicellular stipitate-glandular-hairy (hairs not forming distinct lines), otherwise sparsely to moderately unicellular-hairy on outer surface, petals connate, lobes 9–25 mm, tube usually gradually expanded into lobes, 12–27 mm (equaling or longer than lobes);

stamens 5, much exserted, ± unequal, 32–68 mm.

borne on erect pedicels, 6–8 × 5–6 mm, stipitate-glandular-, eglandular-, and unicellular-hairy.

borne on erect pedicels, 10–30 × 3–6.5 mm, eglandular-hairy, otherwise glabrous or sparsely unicellular-hairy.

with distinct tails;

testa closely appressed.

without distinct tails;

testa rather close, but ± loose.

bud scales stipitate-glandular- and eglandular-hairy abaxially, margins stipitate-glandular-hairy.

bud scales usually glabrous abaxially, margins unicellular-ciliate.

= 26.

= 26.