340 CONTKIBUTIONS FROM THE NATIONAL HERBARIUM. 



2. Pninus apodantha Blake, Contr. Gray Herb. n. ser. 52: 68. 1917. 

 Known only from the type locality, Rio Hondo, State of Mexico. 



Shrub. 60 cm. high ; leaves oval, 1.5 to 3 cm. long, 1 to 1.5 cm. wide, obtuse, 

 crenate-serrate, pilose beneath ; petals 3.3 mm. long, 



3. Prunus minutiflora Engelm. Bost. Journ. Nat, Hist. 6: 185. 1850. 

 Reported f i-om Chihuahua. Western Texas ; type collected between San 



Antonio and New Braunfels, 



Shrub 30 to 60 cm. high, densely branched; leaves 1 to 2 cm. long, pubescent 

 beneath or glabrate ; fruit 8 to 12 mm. long. 



4. Prunus fasciculata (Torr.) A. Gray, Proc. Amer. Acad, 10: 70, 1874. 

 Emplectocladus fasciculatus Torr. in Fr6m. Rep. Exped. Rocky Mount. 10. 



pi. 5. 1850. 



AmygdaJais fasciculata Greene, Fl. Franc. 49. 1891. 



Baja California, on dry slopes. Southern California (type locality) to Utah 

 and Arizona, 



Densely branched shrub, 1 to 2.5 meters high, with gray bark; leaves 1 to 

 1.5 cm. long; flowers very small, the petals white, linear; fruit 10 to 12 mm. 

 long, densely pubescent, with very thin flesh. 



5. Prunus fremontii S. Wats. Bot, Calif. 2: 442, 1880. 

 Amygdalus fremontii Abrams. Bull. N. Y. Bot. Gard. 6: 385. 1910. 

 Northern Baja California. Southern California, the type from San Diego 



County. 



Shrub, sometimes 4.5 meters high, with stiff spinescent branches ; leaves 

 about 1 cm, long, thin, deciduous ; flowers white, about 1 cm. broad. 



6. Prunus microphylla (H. B. K.) Hemsl. Biol. Centr. Amer. Bot. 1: 368. 



1888. 

 Amygdalus microphylla H. B. K. Nov. Gen. & Sp. 6: 243., pi. 564. 1823, 

 San Luis PotosI to Hidalgo ; type collected between Pachuca and Mor^n, 



at an altitude of 2,340 meters. 



Shrub, about a meter high, densely branched ; leaves 1 to 1.5 cm. long ; 



flowers small, white. 



7. Prunus virens (Woot. & Standi.) Standi. 



Prunus salicifolia a<;utifolia S. Wats. Proc, Amer, Acad. 22: 411. 1887. 



Padus virens Woot. & Standi. Contr. U. S. Nat. Herb. 16: 132. 1913. 



In mountain canyons. Chihuahua and Sonora to Durango and San Luis 

 PotosI. Southern Arizona to western Texas; type from Organ Mountains, 

 New Mexico. 



Tree, usually about 7 meters high, with smooth, thin, reddish brown bark, 

 the top broad and spreading, dense; leaves ovate or ovate-oblong, bright 

 green ; flowers small, white ; fruit black, about 1 cm. in diameter, sweet, 

 edible. 



Perhaps not sufficiently distinct from P. capuli. 



8. Prunus capuli Cav. Anal. Hist. Nat. (Madrid) 2: 110. 1800. 

 Prumis salicnfolia H. B. K. Nov. Gen. & Sp. 6: 190. pi. 56S. 1823. 

 Cerasus capoUin DC; Seringe in DC. Prodr. 2: 539. 1825. 



Sonora to Chiapas and Veracruz. Guatemala to Peru; type from Ecuador. 



Shrub or usually a tree, sometimes 15 meters high, with a trunk nearly a 

 meter in diameter, the bark reddish brown or grayish, nearly smooth, the 

 crown broad ; leaves lanceolate to ovate, lustrous, nearly glabrous ; flowers 

 small, white ; fruit red or black, 1 cm, in diameter or smaller. Generally 

 known as " capulln," "capuli," or " capollln " (the name doubtless applied to 

 other species also, and applied to this species in Peru and Ecuador) ; " tnun- 



