NATIVE AMERICAN SPECIES OF PRUNUS. , 29 
Few horticultural varieties belong to the subspecies, but American 
Eagle, Quaker, Van Buren, and Wolf are referable to it. 
Prunus MExIcana Wats. 
(Big-tree plum.) 
Prunus mexicana Wats., 1882, in Proc. Amer. Acad. Sci., v. 17 (n. s. v. 9), p. 353. 
Prunus americana mollis Torr. and Gray, 1840, Fl. N. Amer., v.1, p. 407, in part. 
Prunus australis Munson; Waugh, 1898, in Bot. Gaz., v. 26, no. 1, p. 52. 
Prunus reticulata Sarg., 1911, Trees and Shrubs, v. 2, pt. 3, p. 151, t. 162. 
Prunus tenwfolia Sarg., 1911, Trees and Shrubs, v. 2, pt. 3, p. 153, t. 168. 
Prunus polyandra Sarg., 1911, Trees and Shrubs, v. 2, pt. 3, p. 155, t. 164. 
Prunus arkansana Sarg., 1911, Trees and Shrubs, v. 2, pt. 3, p. 157, t. 165. 
Leaves (PI. II, fig. 1) oblong-obovate or obovate, mostly 7 to 10.5 
cm. long, 4 to 6.5 cm. broad, the margin sharply serrate or sometimes 
doubly serrate, rounded or even subcordate at the base and acute or 
abruptly acuminate toward the apex, yellowish green, and _ soft- 
pubescent above with short appressed hairs at least when young, 
pale green below and more strongly pubescent with longer hairs, 
veins at length rather prominent or sometimes strongly reticulate 
below and often in age appearing somewhat rugose above; petioles 
usually stout, velutinous, though sometimes sparingly so, mostly 10 
to 12 mm. long, usually with one or more short-stalked glands at or 
near the apex or rarely on the base of the leaf blade; stipules usually 
lobed, the lobes linear and glandular serrate. Flowers about 15 to 18 
mm. broad in nearly sessile umbels of 2 to 4; pedicels glabrous or 
rarely pubescent, usually 9 to 12 mm. or sometimes even 15 mm. 
long; calyx campanulate, the upper part of the tube and lobes soft- 
pubescent with short hairs, the tube 2.5 to 3 mm. long, the lobes 
oblong or ovate-oblong and as long as the tube or nearly so, dentate 
at the apex or sometimes entire, obscurely glandular in the margin, 
rather strongly pubescent within, at least toward the base, and 
usually reflexed; petals mostly 6 mm. to very rarely 10 mm. long, 
sometimes sparingly and obscurely pubescent on the outer surface 
toward the base, varying even in the same specimen from ovate- 
orbicular and abruptly contracted to a short claw to oblong-oval and 
gradually narrowed to a claw, the margin usually entire. Fruit 
ripening in October and November, rarely earlier, globose or very 
rarely oblong, 18 to 30 mm. in diameter or rarely larger, dark purplish 
red with bluish bloom; stone (Pl. VIII, figs. 17 to 24) obovoid to 
nearly round, 12.5 to 16 mm. long, 10 to 12 mm. broad, turgid, 
usually pointed at the base and rounded at the apex or sometimes 
slightly pointed, slightly grooved on either side a short distance from 
the ventral edge and inconspicuously grooved, or the groove entirely 
absent along the dorsal edge, surface smooth, except for a few usually 
indistinct ridges toward the base. 
