74 FiKLU Manual 



straight thorns. Leaves obovate to spatulate, crenate or 

 crenate-serrate, shining above. Corymbs 1-3 flowered. Fruit 

 ellipsoid, pyriform or globose, greenish-yellow or red. In 

 sandy soil. N. Y. to Fla., west to W. Va., Mo., and Tex. 



M. Crataegus douglasii Lindl. Douglas' llawtliorn. 

 A shrub or tree with dark brown scaly bark and short thorns. 

 Leaves ovate to obovate. doubly serrate and lobcd. dark green 

 and pubescent above. Fruit short-ellipsoid, dark i)urple ; flesh 

 soft, sweet. From Mich, northwestward. 



52. Crataegus phaenopyrum (L. f.) Medic. Washing 

 ton Hawthorn. A shrub or small tree with strongly ascending 

 branches and numerous thorns. Leaves ovate-triangular, 

 simply or doubly serrate, often 3-5 lobed, bright green and 

 glabrous above. Fruit depressed-globose, scarlet. Moist rich 

 ground. A very desirable species for cultivation. Va. to 

 Ga., 111., and Ark. Naturalized northward to N. J., Pa., and 

 Ohio. 



Amygdalatae. Peach Subfamily. 



11. Priinus (Tourn.) L. Apricot, Plum, .Cherry. 



Shrubs or trees with alternate, simple, serrate, pinnately- 

 veined leaves, with disk-like or tooth-like glands on the petiole ; 

 with stipules or stipular scars, cylindrical pith, twigs some 

 shade of brown, and with the fruit a drupe. 



Terminal bud present or self-pruned ; perianth pcn- 

 tamerous ; carpel 1, hypanthium deciduous; drupe mostly 

 edible. 



1. Terminal bud usually present; leaves condu])licatc in 

 vernation ; stone globose, little or not at all flattened ; 

 inflorescence racemose, corymbose, or umbellate. '2. 



1. Terminal bud self-pruned; leaves convolute in vernation; 



stone of the drupe compressed; inflorescence umbel- 

 late or with only 1 or 2 flowers. 7. 



2. Petioles usually not over ^ in. long ; leaves ovate, 



abruptly acute at the apex ; flowers corymbose, termin- 

 ating twigs of the season. P. mahaleh. 



2. Petioles usually an inch or more long, or if not, the leaves 



not ovate; flowers in umbellate or somewhat corymbose 

 clusters, or in racemes. 3. 



3. Flowers in umbellate or corymbose clusters. 1. 

 3. Flowers in racemes. 6. 



