Flora of North America species comparison

1+ (derived from root shoots), erect;

bark dark brown, reddish brown, or gray, firm, platy or scaly; long and short shoots present;

thorns present (modified short shoots); glabrous, glabrescent, villous, densely puberulent, or tomentose.

to 30 cm diam.;

bark dark gray or dark brown, smooth or rough;

young branches dark green and puberulous, becoming purplish or purplish brown and glabrous at maturity; flowering shoots developing as spurs, 5–20(–40) mm.

dark purple, ovoid, 3–4(–5) mm, scale margins sparsely ciliate.

deciduous [semipersistent], cauline, simple, shoot dimorphism, long- and juvenile-shoot leaves usually larger and more deeply serrate (lobed) than short-shoot leaves;

stipules deciduous (or persistent on vigorous shoot leaves in M. baccata), basally adnate to petiole, linear-lanceolate to lanceolate, sometimes filiform, membranous, sometimes herbaceous, margins entire, serrulate, glandular-serrate, sparsely glandular-denticulate, or white-ciliate;

petiole present;

blade elliptic, ovate, obovate, triangular-ovate, oval, lanceolate, ovate-oblong, or oblong, (2–)4–12 cm, membranous or leathery, margins flat, sometimes lobed, dentate, serrulate, serrate, doubly serrate, crenate, or sometimes entire, venation pinnate (craspedodromous when lobed, camptodromous when unlobed), surfaces glabrous or tomentose.

convolute in bud;

isomorphic;

stipules deciduous, linear-lanceolate, 5–6 mm, apex acuminate;

petiole 10–30 mm, sparsely pubescent when young, glabrescent;

blade ovate or ovate-oblong, 5–10 × 2.4–4 cm, base broadly cuneate, rarely rounded, margins unlobed, sharply serrulate, apex acuminate, surfaces sparsely puberulent when young, becoming glabrous.

umbel-like;

peduncles absent;

bracteoles rarely persistent, lanceolate, 2 mm.

terminal on short shoots, 2–12-flowered, flat-topped panicles, glabrous or tomentose;

bracts present (absent in M. fusca), caducous, ovate, linear-lanceolate, membranous, glabrous;

bracteoles present.

present.

30–40 mm, glabrous or slightly villous.

bisexual (occasionally andromonoecious in M. halliana), opening with leaves, perianth and androecium epigynous, 15–50 mm diam.;

hypanthium campanulate, size not recorded, glabrous or tomentose;

sepals 5, reflexed to wide spreading, triangular, triangular-lanceolate, triangular-ovate, or lanceolate;

petals 5 (or more in M. halliana), white, pink, or red, suborbiculate, obovate, narrowly or oblong-obovate, ovate, or ± elliptic, base clawed;

stamens 15–50, unequal, usually shorter than, rarely equal to, petals;

carpels 3–5, connate, adnate to hypanthium, styles 3–5, emerge from base of hypanthium, basally connate, glabrous or tomentose basally;

ovules 2.

35–40 mm diam.;

hypanthium constricted distal to ovaries, glabrous or sparsely villous;

sepals triangular-ovate, 4–5 mm, equal to or shorter than tube, apex acute or acuminate, abaxial surface glabrous, adaxial hairy;

petals white, sometimes pink-white, obovate, 15 mm, claws 1 mm, margins crenulate, apex rounded;

stamens 20, 6–8 mm, anthers white before dehiscence;

styles 3(or 4), basally connate to 1/2 length, 7–9 mm, slightly longer than stamens, proximally tomentose.

pomes, green, yellow, or red, globose, depressed-globose, obovoid, or oblong, 6–50(–70) mm diam., glaucous, waxy, punctate;

flesh homogeneous, stone cells adjacent to carpels and epidermis;

hypanthium persistent;

sepals persistent or deciduous, erect or reflexed;

carpels cartilaginous;

styles persistent or deciduous.

greenish yellow with red blush, ellipsoid or subglobose, 10 mm diam., cores enclosed at apex;

sepals deciduous;

sclereids sparse to moderate surrounding core.

2 per carpel, light, dark, or reddish brown, smooth.

brown.

= 17.

= 51, 68.