HOUGH'S AMERICAN WOODS. abcd'et 



g Oval to orbicular. 



h Membranaceous, hairy on veins bn., 



i Rounded or obtuse a. and b., sharply serrate with 2-3 short lobes, 

 glabrous yellow-green ab., paler and concave bn. 



PBINGLE'S THORN (C. Pringlei). 



12 Acute or acuminate a., rounded b., sharply serrate-dentate, and with 

 3 or 4 pairs short lobes, scabrous ab., pubescent on veins bn. 



HOLME'S THORN (C. Holmesiana). 

 h2 Coriaceous, finely doubly serrate-dentate. 



SCARLET THORN (C. coccinea). 

 f2 With 5 papery usually 2-seeded carpels; small flat waxy fragrant apples; 



Ivs. 

 g Tomentose or pubescent bn., oblong-ovate to oval, 



h Crenate-serrate and usually with short crenate lobes; fr. stems slender 



and glabrate PRAIRIE CRAB (Pyrus loemis). 



h 2 Crenate and very much wrinkled; fr. stems short. 



SOULARD CRAB (Pyrus Soulardi). 



g2 Glabrous throughout, with long slender stems; fr. hard translucent long- 

 stemmed and calyx-lobes. 



h Deciduous; fr. yellowish, red-cheeked, scarcely waxy and but little 

 hollowed at b. ; Ivs. ovate-oblong serrate or sometimes entire, not 



lobed SIBERIAN CRAB ( Pyrus baccata ) . 



h2 Persistent in fruit; fr. yellow-green, waxy, deeply hollowed at b., very 

 sour; Ivs. triangular ovate to trucate or subcordate b., acute a., 

 serrate-dentate and usually with few short lobes. 



FRAGRANT CRAB (Pyrus coronaria). 

 e 2 Fruit a juicy syncarp (blackberry-like), edible; Ivs. with arcuate lateral 



veins, the lowermost pair branching; Ivs. 



Lustrous ab., glabrous bn., broad-ovate, coarsely serrate; fr. pinkish white. 



WHITE MULBERRY (Morus alba). 



f2 Dull dark green and rough ish ab., pubescent and strongly reticulate bn., 

 orbicular ovate; petioles glabrate; fr. purple-black. 



RED MULBERRY (Morus rubra) . 



c3 Fruit a globular head with seeds exserted on red fleshy stipes; Ivs. rough ab., 

 under surface and petioles velvety-pubescent. 



PAPER MULBERRY (Broussonetia papyrifera). 

 6 Margin crenate-serrate ; 

 e Leaves opposite, mostly 



f Oblong, tapering b., acuminate; small trees and shrubs; Ivs. 

 g Glabrous bn., 2-3 in.; inhabits wet lowlands; fr. drupe. 



SWAMP PRIVET (Forestiera acuminata). 



K 2 Pubescent bn., 2-5 in., membranaceous and very finely crenate-serrate; 

 an upland tree; fr. fleshy capsule. 



BURNING BUSH (Euonymus atropurpureus) . 



f2 Broad-ovate to oval, l%-5% in., rounded b., obtuse to acute a., the lateral 

 veins very prominent and arcuate; fr. drupe-like. 



BUCKTHORN (Rhamnus cathartica). 

 e 2 Leaves alternate, 



