124 BOSACE^E. (ROSE FAMILY.) 



G. C. toinentasa, L. (BLACK or PEAR THORN.) Downy or vittous- 

 pubescent, at least when young, oil the peduncle*, ciilyx, i.nd lower side of the 

 ; linns thickisli, rather large, oval or ovate-oblong, sharply toothed and 

 often cut, abruptly narrowed at the base into a somewhat margined petiole, the up- 

 per surface more or less furrowed along the veins ; flowers large (often 1' broad), 

 white ; fruit crimson or onnif/t-nd, usually largo ('-!' broad), globular or some- 

 what pear-shaped, edible. Thickets ; common. May, June. A tall shrub or 

 low tree, of many varieties, of which the following are the most marked. 



Var. pyri folia. Leaves sparingly pubescent beneath when young, soon 

 glabrous, smooth and shining above, often slightly cut-lobcd ; fruit large, bright- 

 colored, sparingly dotted, of a pleasant flavor. (C. pyrifulia, Ait.) 



Var. piiiietala.. Leaves rather small, mostly wedge-obovute, with a 

 longer tapering and entire base, unequally toothed above, rarely cut. vilious 

 pubescent when young, smooth but dull when old, the numerous veins more 

 strongly impressed on the upper surface and prominent underneath; fruit glo- 

 bose, usually dull red and yellowish with whitish dots. (C. punctata, . 7m </.) 



Var. lia6lliS. Leaves rounded, abrupt or somewhat heart-shaped at tho 

 base, soft-downy both sides, or at least beneath, very sharply doubly-toothed and 

 cut; fruit often downy. (C. subvillosa, Schrader. C. coccinea, var. 1 rnollis, 

 Torr. $ Cray. ) Michigan, Illinois, and south westward. 



7. C. CrilS-gaJli, L. (COCKSPUR THORN.) Glabrous; h-avcs thick, 

 sJiiu'uKj aboce, wedye-obovate and oblanceolate, tapering into a very short petiole, 

 serrate above the middle; fruit globular, bright-red (' broad). Thickets. 

 June. Shrub or tree 10 -20 high, with firm dark green leaves very shining 

 above, and slender sharp thorns often 2' long. This is our best species for hedges. 



# Corymbs simple few- (1 -6-) flowered: calyx, bracts, $~c. glandular. 



8. C, Ilava, Ait. (SUMMER HAW.) Somewhat pubescent or glabrous ; 

 I, a res n:(ih/<'.-olxjrtile or rltoiiibic-obovate, narrowed at the base into a glandular 

 petiole, ti/icyttally toothed and somewhat cut above the middle, ralln.r thin, the teeth, 

 &c. ylandular; styles 4-5; fruit somewhat pear-shaped, yellowish, greenish, or 

 reddish ('-' broad). Sandy soil, Virginia and southward. May. Tree 

 15 -20 high, with rather large flowers, 2-6 in a corymb. 



Var. pubcsceiis. Downy or villous-pubescent when young ; 1 

 thickish, usually obtuse or rounded at the summit. (C. clliptiea, Ait. C. glan- 

 duK>sa, MitJix. C. Virginica, Lodd.) Virginia and southward. 



9. C. parvifolia, Ait. (DwARF THORN.) Downy ; leaves thick, </ 

 tpatulate, n-utntr-ttMii/n-d (%'- \' long), almost sessile, the upper surface at length 

 shining; flowi-rs solitary or 2-3 together, on very short peduncles; cahj.r-^ 



lony as thf jxld/s ; styles 5; fruit globular or pear-shaped, greenish -vellow. 

 Sandy soil, New Jersey to Virginia and southward. May. Shrub 3 - 6 high. 



17. PYRUS, L. PEAR. APPLE. 



Calyx-tube urn-shnpcil, the limb 5-cleft. Petals roundish or obovate. Sta- 

 mens numerous. Styles 2-5. Fruit (pome) fleshy or berry-like ; the 2-5 car- 

 pels of a papery or cartilaginous texture, 2-scedrd. Trees or shrubs, with 

 handsome flowers in corymbed cymes. (The classical name of the Pear-tree.) 



