486 REPORT OF NEW JERSEY STATE MUSEUM. 



Northern and Coast districts, frequent, and occasional in the 

 Middle district. This rose is taller than the preceding-, with 

 heavier more or less curved prickles and the tlowers usually in 

 corymbs. Normally, it seems to grow in moister spots, but on 

 the coast islands, where R. humilis is absent, it grows in various 

 situations, those bushes which grow in the driest ground being 

 dwarfed, but obviouslv the same stock as the others. In the 

 Middle district this species is absent, R. humilis being the com- 

 mon form, while in the Pine Barrens no roses occur. 



Fl. — Mid-June to mid-July. Fr. — Late summer and autumn, 

 persisting into winter. 



Coast District. — Sandy Hook, Seaside Park, Barnegat City (L), Beach 

 Haven (L), Beach Haven Terrace (L), Surf City (L), Atlantic City (S), 

 Ocean City (S), Five-Mile Beach, Cape May (S). 



Family POMACE/E. Apples, etc. 



Key to the Species. 



a. Mature carpels soft, cartilaginous ; limbs and branches not spiny. 



b. Leaves rather coarsely more or less irregularly serrate, those on ster- 

 ile shoot% sometimes lobed. Fruit greenish. Mains angtistifolia, p. 486 

 bb. Leaves finely and regularly serrate. 



c. Serrations somewhat curved inward at the tip, leaves all distinctly 

 narrowed toward the base, blade on fully developed leaves 65 

 mm. long. 

 d. Fruit black. 



e. Leaves glabrous beneath. Aronia nigra, p. 487 



ee. Leaves pubescent beneath. A. atropurpurea, p. 487 



dd. Fruit red, leaves pubescent beneath. A. arbutifolia, p. 487 

 cc. Serrations very sharp, not curved at tip, some of the leaves, at 

 least, rounded at base; blade not over 50 mm. long. 

 d. Leaves not cordate at base. .-ImelancJiicr intcniicdia, p. 488 

 dd. Leaves cordate at base. A. canadensis, p. 488 



aa. Mature carpels very hard and bony, branches armed with stout spines. 

 b. Leaves not lobed. 



r. Calyx lobes entire, leaves thick shining obovate, spines 3-18 cm. 



long. Cratccgus crusgalli, p. 489 



cc. Calyx lobes serrate, corymbs 1-7 flowered. C. tomcntosa, p. 489 



bb. Leaves lobed. C. pniinosa, p. 489 



MALUS Hill. 



Malus angustifolia (Ait.). Narrow-leaved Crab Apple, 



Pynis angustifolia Aiton, Hort. Kew. H. 176. 1789 [N. America].— Britton 99. 

 Malus angustifolia Keller and Brown 179.— Van Pelt, Bartonia L 26. 1909. 



