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 with platelike scales;

young branches reddish orange and glabrous, becoming reddish brown; flowering shoots becoming spurs, 3–10(–25) mm.

reddish brown, ovoid, 3–4 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.

convolute in bud;

isomorphic;

stipules deciduous or persistent on vigorous shoot leaves, lanceolate, sometimes filiform, 3 mm, apex acuminate;

petiole 20–50 mm, glabrous;

blade elliptic or ovate, 3–8 × 2–3.5 cm, base cuneate or rounded, margins unlobed, serrate, apex long-acuminate, sometimes caudate, surfaces glabrous or slightly puberulent when young.

umbel-like;

peduncles absent;

bracteoles absent.

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.

15–40 mm, glabrous.

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.

not fragrant, 30–35 mm diam.;

hypanthium constricted distal to ovaries, glabrous;

sepals lanceolate, 5–7 mm, longer than tube, apex acuminate, abaxial surface glabrous, adaxial tomentose;

petals white, obovate, 20–30 mm, claws 1–2 mm, margins entire, apex obtuse rounded;

stamens 15–20, 7–9 mm, anthers yellow before dehiscence;

styles (4 or)5, basally connate to 1/2 length, 8–10 mm, longer than stamens, densely villous basally.

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.

yellow to red, subglobose, 8–10 mm diam., cores enclosed at apex;

sepals deciduous;

sclereids sparse surrounding core.

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

light reddish brown.

= 17.

= 34.