312 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 



5. FENDLERA' Engelni. & Gray; A. Gray, PI. Wright. 1: 77. 1852. 

 Reference : Rehder, Journ. Arn. Arb. 1 : 203-206. 1920. 



Erect shrubs with striate branches ; leaves small, deciduous, entire, 3-nerved, 

 sessile or nearly so ; flowers large, white, solitary or clustered. 

 Leaves linear, strongly revolute, glabrous or nearly so on the upper surfkce. 



1. F. linearis. 

 Leaves narrowly lanceolate to ovate-oblong. 



Leaves sparsely strigose or nearly glabrous beneath, glabrous above, not revo- 

 lute 2. E. rupicola. 



Leaves tomentose and strigose beneath, scabrous above, revolute. 



3. F. wrightii. 



1. Fendlera linearis Rehder, Journ. Arn. Arb. 1:205. 1920. 



Known only from the type locality, in the Sierra Madre near Monterrey, 

 Nuevo Le6n, 



Leaves 1.5 to 2.5 cm. long, 1 to 1.5 mm. wide, strigose beneath; petals 7 to 8 

 mm. long ; capsule about 8 mm. long. 



2. Fendlera rupicola A. Gray, PI. Wright. 1: 77. 1852. 



Sonora. Western Texas and southern New Mexico ; type from New Braunfels, 

 Texas. 



Shrub, 1 to 2 meters high ; leaves oblong or elliptic, 1 to 4 cm. long ; petals 1.5 

 to 2 cm. long, 



3. Fendlera wrightii (A. Gray) Heller, Bull. Torrey Club 24: 537. 1897. 

 Fendlera rupicola wrif/htii A. Gray, PI. AV right. 1: 77. 1852. 



Chihuahua. Western Texas to Colorado and Arizona ; type from San Pedro 

 River, Texas, 



Shrub, very similar to the preceding species ; leaves 1 to 2 cm. long ; petals 

 usually only 1.2 to 1.5 cm. long. 



53. PTEROSTEMONACEAE. Pterostemon Family. 

 1. PTEHOSTEMON Schauer, Linnaea 20: 736, 1847, 

 Pubescent shrubs ; leaves alternate, petiolate, dentate, the stipules minute 

 or obsolete ; flowers perfect, showy, white, cymose ; fruit a capsule. 

 Calyx densely pilose with long stiff white hairs ; leaf blades somewhat nar- 

 rowed to the obtuse or broadly cuneate base 1. P. mexicanus. 



Calyx puberulent or mintitely pilose ; leaf blades rounded or broadly rounded 

 at base 2. P, rotundifolius. 



1. Pterostemon mexicanus Schauer, Linnaea 20: 726, 1847, 

 Hidalgo ; type from Zimapdn, 



Shrub with dark branches ; leaves obovate-orbicular, 2 to 3 cm. long, densely 

 pilose beneath ; flowers about 1 cm. long. 



2. Pterostemon rotundifolius Ramirez, Estudio 4: 453. pi. 18. 1893, 



Puebla and Oaxaca ; type from between Jaltepetongo and Guandulain, 

 Oaxaca, 



Shrub, 1.5 to 3 meters high ; leaves suborbicular, 2 to 3 cm. long, soon glab- 

 rate beneath. 



* August Fendler (1813-1883), a native of Prussia, came to the United States 

 in 1834. Later he visited Prussia, but soon returned to North America and set- 

 tled in St. Louis, where he made the acquaintance of Engelmann. In 1847 he 

 followed the Santa Fe Trail to New Mexico, where he made a large collection of 

 plants, upon which a report was published by Gray. Later he botanized in 

 Panama and Venezuela, where he obtained important collections, and finally 

 settled in Trinidad, where he died. 



