726 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 



4. Bhanmus betulaefolia Greene, Pittonia 3: 16. 1896. 



Rhamnus californica hetulaefolia Trel. in A. Gray, Syn. Fl. 1*: 408. 1897. 



Rhamnus revoluta Rose, Contr. U. S. Nat. Herb. 8: 51. 1903. 



Rhammis ellipsoidea Greene, Leaflets 2: 267. 1912. 



Rhamnus confinis Greene, Leaflets 2: 267. 1912. 



Chihuahua, Sonora, Durango, and Nuevo Leon. Western Texas to southern 

 Arizona ; type from Mogollon Mountains, New Mexico. 



Large shrub ; leaves short-petiolate, oblong to broadly elliptic, 4 to 10 cm. 

 long, acute or obtuse, bright green, pubescent or glabrate on the upper surface ; 

 umbels puberulent ; fruit tricoccous. 



5. Rhamnus brandegeana Standi. 



Rhavinus purpusii T. S. Brandeg. Univ. Calif. Publ. Bot. 4:274. 1912. Not 

 R. purpusi Schelle, 1903. 



Tamaulipas and San Luis PotosI ; type from Minas de San Rafael, San Luis 

 Potosl. 



Small tree, glabrous throughout or nearly so ; leaves slender-petiolate, ovate 

 or oblong-ovate, 4 to 8 cm. long, obtuse or acutish, bright green, the margins 

 revolute ; petals none. 



The writer has seen four collections of this species, including one (without 

 locality) obtained by Thomas Coulter, but all are without fruit. The generic 

 position of the plant is uncertain. 



6. Bhamnus stenophylla Standi., sp. nov. 



Mountains of Tepic ; type collected in the Sierra Madre (Rose 3464; U. S. 

 Nat. Herb, no 302441). 



Branches brown, puberulent; leaves short-petiolate, 6 to 12 mm. long, obtuse 

 or rounded at apex, obscurely serrulate, sparsely pilosulous beneath when young 

 but soon glabrate, the margins somewhat revolute ; pedicels solitary or gem- 

 inate, puberulent; calyx 5-lobate; petals much shorter than the sepals; fruit 

 5 mm. long, glabrous. 



7. Rhamnus serrata Willd. ; Roem. & Schult. Syst. Veg. 5 : 295. 1819. 

 Rhamnus serrulata H. B. K. Nov. Gen. & Sp. 7: 51. pi. 607. 1825. 

 San Luis Potosi to Mexico ; type from San Agustln de las Cuevas. 



Shrub or small tree, sometimes 6 meters high ; leavas short-petiolate, oblong 

 or elliptic-oblong, 2 to 5.5 cm. long, acute or obtuse, coriaceous, sharply serru- 

 late, yellowish beneath, at ttrst minutely pilo.se but soon glabrate ; umbels 

 glabrous ; fruit 6 to 7 mm. long. " Capulincillo " (San Luis Potosl) ; " tlalcapol- 

 lin" (Nahuatl, TJrUna). 



8. Rhamnus ilicifolia Kellogg, Proc. Calif. Acad. 2: 37. 1863. 

 Rhamnus insularis Greene, Bull. Calif. Acad. II. 2: 392. 1887. 

 Rhamnus crocea insularis Sarg. Gard. & For. 2: 364. 1889. 



Baja California. California and Arizona ; type from Clear Lake, California. 



Shrub or small tree, sometimes 7 meters high, with a trunk 20 cm. in diame- 

 ter ; bark thin, gray ; leaves 1.5 to 5 cm. long, obtuse or rounded at apex, rigid, 

 spinose-dentate, yellowish beneath, glabrous or nearly so ; petals none ; fruit 

 red, 5 to 7 mm. long. 



Sometimes known as " California holly." R. insularis is a form with large, 

 less conspicuously toothed leaves. R. ilicifolia is closely related to R. crocea 

 Nutt., and may not be specifically distinct. That species is said to have yellow 

 fine-grained heavy wood. The fruit was eaten by the Indians of California. 

 It is said to give a conspicuous red tinge to the body of one who eats it in 

 quantity. The bark has an agreeable odor and is rather bitter ; it has tonic 

 and slightly laxative, or in large doses cathartic, properties. 



