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.

5–25 cm diam.;

bark reddish brown to gray, longitudinally fissured with platelike scales;

young branches reddish brown, sparsely puberulent, becoming gray or grayish brown, glabrescent; flowering shoots developing as short spurs or spiny thorns, (5–)10–40(–60) mm.

reddish brown, ovoid, 1.6 mm, scale margins tomentose.

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.

conduplicate in bud;

heteromorphic;

stipules deciduous, linear-lanceolate, 2–4(–5) mm, apex acuminate; vigorous shoot leaves: petiole (10–)15–25 mm, villous, sometimes tomentose;

blade elliptic, oval, or ovate, sometimes triangular-ovate, (3.5–)4–6(–8) × (1.5–)3–4(–5) cm, base cuneate, sometimes rounded, margins sometimes slightly lobed, crenate, crenate-serrate, serrate, or entire, sometimes doubly serrate, apex rounded, broadly acute, sometimes apiculate, abaxial surface glabrous (villous only on veins), adaxial glabrous; flowering shoot leaves: petiole 3–10(–25) mm, villous, sometimes glabrous;

blade elliptic or oblong, sometimes ovate, obovate, or lanceolate, (9–)15–50(–65) × (7–)10–20(–30) mm, base cuneate, sometimes rounded, margins unlobed, crenate, crenate-serrate, or entire, apex rounded (with point or acute), abaxial surface glabrous (veins villous), adaxial glabrous.

corymblike;

peduncles absent;

bracteoles sometimes persistent, filiform, (1–)3–4(–6) 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.

(10–)20–30(–40) mm, glabrous, sometimes 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.

20–30 mm diam.;

hypanthium glabrous, rarely slightly villous;

sepals triangular, (2–)3–4(–5) mm, equal to tube, apex acuminate, abaxial surface glabrous, adaxial hoary-tomentose;

petals pink, sometimes fading white, oblong to narrowly obovate, (10–)12–16(–22) mm, claws (2–)3 mm, margins entire, sinuate, or fimbriate, apex rounded;

stamens 20, (7–)9–12(–14) mm, anthers pink or rose before dehiscence;

styles 5, connate basally, (6–)9–12(–15) mm, usually slightly longer than stamens, tomentose in proximal 1/3.

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.

green or yellow-green, subglobose, 10–20(–30) mm diam., cores not enclosed at apex;

sepals persistent, erect;

sclereids abundant surrounding core.

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

dark brown.

= 17.

= 34 (68).