Flora of North America species comparison

1–3+, erect or divergent, straight or geniculate;

bark grayish, thin, smooth, becoming slightly fissured; long and short shoots present, leafy;

thorns present (commonly on short shoots); glabrous or tomentose.

thorns sparse to abundant;

young twigs reddish brown-hairy, glabrescent.

persistent or late-deciduous, cauline, fascicled on short shoots, simple;

stipules caducous, free, lanceolate, membranous, margins remotely serrate, glabrous or tomentose;

petiole present;

blade obovate, ovate, oblong-obovate, oblong, or elliptic to lanceolate or oblanceolate, 1–7 cm, leathery, margins flat or slightly revolute, serrulate, crenulate, or entire, venation pinnate, surfaces glabrous or sparsely hairy to densely tomentose when young, often glabrescent later.

stipules 3–8 mm;

petiole 1–3 mm;

blade oblanceolate or narrowly obovate, 2.5–4.5 × 0.5–1.2 cm, base cuneate, margins entire, rarely with minute teeth near apices, apex truncate or retuse, rarely rounded, abaxial surface brown-hairy, becoming glabrate and pale green, not glaucescent, adaxial glabrous.

terminal, 6–40-flowered, flat-topped panicles, glabrous or tomentose;

bracts present, caducous, lanceolate;

bracteoles present.

3–4 cm diam.

present.

5–12 mm, sparsely brown-hairy.

perianth and androecium epigynous, 3–10(–12) mm diam.;

hypanthium campanulate, 2–4 mm diam., exterior glabrous or densely tomentose;

sepals 5, spreading, broadly elliptic or triangular;

petals 5, spreading, white, usually suborbiculate, base slightly clawed;

stamens 15–20, shorter than petals, filaments 2–4 mm;

carpels 5, distinct, adnate to proximal 1/2 of hypanthium, externally glabrous or tomentose, styles terminal, distinct, about equal to stamens;

ovules 2.

8–10 mm diam.;

hypanthium densely hairy;

calyx brown- or yellowish brown-puberulent when young, glabrescent, sepals triangular, 1–1.3 mm, apex acute;

petals suborbiculate, 3–4 mm, apex slightly emarginate.

pomes, red or orange-red, rarely yellow, globose, 3–8 mm diam., glabrate;

flesh soft;

hypanthium persistent;

sepals persistent, erect or incurved;

carpels woody;

styles usually persistent.

orange-red, 4–7 mm diam.;

pedicels 5–13 mm.

5.

= 17.