

ROSACES 557 



Flowers in axillary umbels or corymbs; fruit bright red and lustrous, ' in diameter or less; 



leaves conduplicate in the bud. MAHALEB. BIRD CHERRIES. 

 Leaves oblong-lanceolate, acuminate or rarely acute at apex. 



12. P. pennsylvanica (A, B, F). 

 Leaves oblong-obovate to oblanceolate, usually obtuse, occasionally acute at apex. 



13. P. emarginata (B, F, G). 



Flowers in terminal racemes on leafy branches of the year; fruit globose, red or rarely yel- 

 low; leaves conduplicate in the bud. PADUS. WILD CHERRIES. 



Calyx-lobes deciduous from the fruit; leaves oblong-oval or obovate, abruptly pointed, 

 cuneate, rounded or in one form cordate at base. 14. P. virginiana (A, B, F, G). 

 Calyx-lobes persistent on the fruit. 

 Petioles biglandular near the apex. 



Leaves oblong to oblong-lanceolate, acuminate, glabrous, or rarely pubescent on the 



midrib below. 15. P. serotina (A, C). 



Leaves oval, broad-ovate or rarely obovate, acute, short-pointed or rounded at apex, 



villose-pubescent below. 16. P. alabamensis (C). 



Leaves obovate, oval or elliptic, short-pointed or rounded at apex, covered below 



with rufous hairs. 17. P. australis (C). 



Petioles without glands: leaves elliptic to ovate or slightly obovate, acute, rounded or 



abruptly short-pointed at apex, in one form rusty pubescent on the midrib below. 



18. P. virens (E, F, H). 



Flowers in racemes from the axils of persistent leaves of the previous year; fruit globose 

 or slightly three-lobed; leaves conduplicate in the bud. LAUROCERASUS. CHERRY 

 LAURELS. 



Calyx-lobes rounded, undulate on the margins; leaves oblong-lanceolate, acuminate, en- 

 tire or rarely remotely spinulose-serrate: fruit black, the stone broad-ovoid, acute, 

 cylindric. 19. P. caroliniana (C). 



Calyx-lobes acute, minute. 



Leaves elliptic to oblong-ovate, entire; fruit orange-brown, the stone subglobose. 



20. P. myrtifolia (D). 



Leaves ovate to ovate-lanceolate, acute, rounded or emarginate at apex, conspicuously 

 spinulose-dentate; fruit red, becoming purple or nearly black, the stone ovoid, 

 short-pointed. 21. P. ilicifolia (G). 



Leaves ovate to lanceolate, acuminate or abruptly short-pointed at apex, usually en- 

 tire; fruit dark purple or nearly black, the stone ovoid to obovoid, short-pointed. 



22. P. Lyonii (G). 



1. Primus subcordata Benth. Wild Plum. 



Leaves broad-ovate or orbicular, usually cordate, sometimes truncate or rarely cuneate 

 at base, and sharply often doubly serrate, when they unfold puberulous on the upper sur- 

 face and pubescent on the lower surface, and at maturity glabrous, or puberulous below, 

 slightly coriaceous, dark green above and pale below, l'-3' long and f '-2' wide, with a 

 broad midrib and conspicuous veins; northward turning brilliant scarlet and orange or red 

 and yellow in the autumn before falling; petioles slender, usually eglandular, J'-i' in 

 length; stipules lanceolate, acute, glandular-serrate. Flowers appearing before the leaves 

 in March and April, f ' in diameter, on slender glabrous or pubescent pedicels i'-f ' long, in 

 2-4-flowered umbels; calyx-tube campanulate, glabrous or puberulous, the lobes oblong- 

 obovate, rounded at apex, pubescent on the outer surface, more or less clothed with pale 

 hairs on the inner surface, half as long as the obovate white petals rounded above and nar- 

 rowed below into a short claw. Fruit ripening in August and September, on stout pedicels 

 '-f long, short-oblong, i'-li' long, with dark red or sometimes bright yellow skin, and 

 more or less subacid flesh; stone flattened or turgid, acute at the ends, '-!' long, nar- 

 rowly wing-margined on the ve.ntral suture, conspicuously grooved on the dorsal suture. 



A tree, 20-25 high, with a trunk sometimes a foot in diameter, dividing 6-8 from the 



