POMACES. 103 



calyx lanceolate, smooth, subserrate ; styles 1 3 ; fruit ovoid-oblong, some- 

 times pyriform. C. lucida Wang. Amer. 



Borders of woods. Can. to Flor. W. to Miss. May, June. A shrub oj 

 small tree, much branched, and with long sharp spines. Flowers white, in fi 

 corymb. Style often solitary. Fruit red. There are several varieties of this 

 apecies. Cockspur Thorn. 



2. C. pundata Jacq. : leaves obovate-cuneate, smooth, somewhat plaited, 

 doubly or incisely serrate ; corymbs and calyx villous -pubescent when 

 young ; styles 1 3 ; fruit dotted, globose. 



Woods and swamps. Can. to Flor. W. to Miss. May. A small tree with 

 rugged branches, usually armed with stout sharp thorns, but sometimes nearly 

 unarmed. Leaves light-green, mostly hairy. Flowers white, numerous, in com- 

 pound corymbs. Fruit large, red or yellow, eatable, but tough. 



Common Thorn. 



3. C. parvifoUa Ait. : leaves obovate-cuneate, nearly sessile, crenate-ser- 

 rate, rarely somewhat incised, pubescent ; flowers subsolitary ; segments of 

 the calyx foliaceous, incised, as long as the petals, and with the short pedi- 

 cels and branchlets villous ; styles 5 ; fruit roundish-pyrifoHn. C. tomen- 

 'j)sa Linn. MespUus laciniata Walt. 



Sandy woods. N. J. to Flor. April, May. T? ^ tem 3 or 4 8 feet high, much 

 branched, with a few long and sharp thorns. Flowers white, mostly solitary and 

 terminal. Fruit a third to half an inch in diameter, pale greenish-yellow, eat- 

 able. Smatt-leaved Thorn. 



** Leaves incised and more or less lobed. 



4. C. tomentosa Linn. : leaves ovate-elliptic or oval, cuneate and nar- 

 rowed at base into a short margined petiole, incisely serrate and sublobed 

 towards the apex, smooth above, somewhat tomentose beneath when 

 young ; peduncles and calyx villous ; segments linear-lanceolate ; styles 

 3 5 ; fruit obovoid or pyriform. ( Torr. <$ Gr.} C. pyrifolia Ait. C. flava 

 Darlingt. 



Borders of woods. Can. to Car, W. to Ken. May, June. T?. Stem 12 20 

 feet high, branching ; the branches armed with long and sharp thorns. Leaves 

 usually large. Flowers white, in large leafy corymbs. Fruit large, orange red, 

 eatable, but rather insipid. Tomentose Thorn. 



5. C. coccinea Linn. : leaves roundish-ovate, acutely incised or sublobed, 

 sharply serrate, thin and at length nearly smooth, on long slender petioles, 

 sometimes a little cordate ; corymbs and calyx pubescent or smooth ; styles 

 3 5 ; fruit globose. C. glandulosa Willd. 



Borders of woods. Can. to Flor. and Louis. May. T^. Stem 10 20 feet 

 high, with spreading rugged branches armed with short slightly-curved thorns. 

 Leaves usually cut into 3 or 4 acute or acuminate angulate lobes on each side. 

 Flowers white, in corymbs terminating the young branches. Fruit rather large, 

 bright red or purple, eatable. Very variable. Scarlet-fruited Thorn. 



6. C. cordata Ait. : leaves deltoid-ovate and subcordate, on long and 

 slender petioles, acuminate, incised and serrate, mostly 3-lobed near the 

 base ; petioles and calyx without glands ; styles 5 ; fruit depressed-globose. 

 P. populifolia Pursh. 



Banks of streams. Washington city to Geor. June. 17. Stem. 15 20 feet 

 high, branching; the branches dark purple and armed with long and very 

 slender thorns. Leaves often deeply and equally 3-lobed like those of the red 

 maple. Flowers white, numerous, in corymbs terminating the branches. Fniit 

 small, bright purple. This species is not known to be a native of our district, 



