138 Rhodora [JULY 
elliptical, and very acute or commonly short acuminate at maturity; 
brownish-purple, half-grown, and unfolded at flowering time: 
petals elongated (10-18 mm. long): summit of the ovary glabrous: 
hypanthium campanulate, slightly constricted on the very young 
fruit: sepals lanceolate, usually reflexed from the base when the 
petals fall: lower pedicels 15-33 mm. long, in fruit 30-50 mm. long: 
trees or tall ainda. 7. A. laevis. 
AA. Flowers commonly solitary (1-8 together), not racemose: mature leaves 
from barely acute at the base to cuneate or tapering; imbricated in the 
bud, not conduplicate, flat or nearly so when young; petioles short and 
stout, 2-7 (10) mm. long: hypanthium more or less constricted below 
on the young fruit: top of the ovary woolly: base of the style more 
gradually enlarged into the ovary and woolly: fruit ellipsoid-ovoid; 
shrubs. 8. A. Bartramiana. 
1. A. SANGUINEA (Pursh) DC. 
Mespilus canadensis y rotundifolia Michx., Fl. Bor. Am. i. p. 291 
(1803), not A. rotundifolia (Lam.) Dum. Cours. Bot. Cult. ed. 2, v. 
p. 459 (1811). Pyrus sanguinea Pursh, Fl. Am. Sept., p. 340 (1814). 
Aronia sanguinea Nutt., Gen. Amer. i. p. 306 (1818). Amelanchier 
sanguinea DC., Prod. ii. p. 633 (1825); Britton, N. A. Trees, p. 439 
(1908). A. canadensis y rotundifolia 'T. & G., Fl. N. A. i. p. 473 
(1840), in part. A. rotundifolia Roemer, Fam. Nat. Syst. Rosif. p. 146 
(1847); Brit. & Brown, Ill. Fl. ii. p. 238 (1897); Brit., Man. p. 518 
(1901). A. canadensis var. rotundifolia, Gray, Man. ed. 1, p. 130 
(1848); also eds. 2-6. A. canadensis var. spicata Sarg., Silva iv. 
p. 129 (1892), in part. A. spicata Robinson & Fernald, Gray's Man. 
ed. 7, p. 460 (1908). 
Straggling or arching slender shrub 1.0-2.5 m. high, not stolonif- 
erous and not forming colonies, the stems solitary, or few in a clump: 
leaves oval to oval-oblong, rarely orbicular (blade 3-6 cm. X 2.5- 
4 cm.), rounded or subcordate at the base, apex subacute, margin 
coarsely dentate-serrate nearly or quite to the base with broad sharp 
spreading teeth (4—5 (6) teeth per cm., about 20-23 teeth on each side 
if toothed to the base) separated by acute, open sinuses; green above 
when young, rarely purplish, unfolding before the flowers, at first 
densely pale-flavescent-tomentose below, retaining some tomentum 
especially on the petioles, but often on the blade, till the fruit is half 
grown or rarely until maturity, at length pale green, slightly glaucous, 
and usually glabrous or nearly so; veins in an average leaf 13-15 
pairs, rather close together, straight, conspicuous, all of the upper in 
typical specimens running straight to the margin and ending in the 
teeth (Ulmus-like), the uppermost strongly ascending; mature 
petioles slender, 12-22 mm. long: flowers many in a loose flexuous or 
drooping raceme (4—7 em. long), slightly silky; lower pedicels (10) 
12-30 mm. long, in fruit 12-25 (30) mm. long; flowers large and showy: 
petals linear to narrowly spatulate, 11-15 mm. long, 3-4 mm. wide: 
hypanthium rather large, open-saucer-shaped, 5 mm. in diameter, 
