722 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 



4. Ceanothus lanuginosus (Jones) Rose, Contr, U, S. Nat. Herb. 12: 2S4. 1909. 

 Ceanofhus greggii lanngitiosus Jones, Proc. Calif. Acad. II. 5: 620. 1895. 

 Chihuahua and Coahuila ; type from Santa Eulalia Mountains, Chihuahua. 

 Shrub with rigid grayish branches ; leaves 7 to 15 mm. long, rounded at 



apex, densely tomentose beneath, tomentose above at first but soon glabrate. 



5. Ceanothus greggii A. Gray, PI. Wright. 2: 28. 1853. 

 Ceanothus australis Rose, Contr. U, S. Nat. Herb. 12: 283. 1909. 

 Chihuahua and Coahuila to San Luis PotosI, Hidalgo, Puebla, and Oaxaca ; 



type from Buenavista, Coahuila. Western Texas to southern Utah. 



Low shrub with intricate brown or grayish branches; leaves 6 to 15 mm. 

 long, rounded or obtuse at apex, green and glabrate on the upper surface. 



6. Ceanothus spinosus Nutt. ; Torr. & Gray, PI. N. Anier. 1: 267. 1838. 



Northern Baja California, Southern California ; type from Santa Barbara. 



Shrub or small tree, sometimes 7 meters high, with a trunk 15 cm. in diam- 

 eter; bark red-brown, scaly; leaves elliptic to oblong-oval, 2 to 4 cm. long, 

 rounded or retuse at apex, pale beneath ; flowers blue. 



7. Ceanothus divaricatus Nutt. ; Torr. & Gray, Fl. N. Amer. 1 : 266. 1838. 

 Baja California. California ; type from Santa Barbara. 



Tall shrub ; leaves oblong-ovate to rounded-ovate, 1 to 3 cm. long, obtuse 

 or rounded at apex, often subcordate at base, entire or serrulate; flowers pale 

 blue. 



Some of the Baja California specimens have been identified as C. palmeri 

 Trel. and C cordulatus Kellogg, but all seem to belong rather to C. divaricatus. 



8. Ceanothus tomentosus Parry, Proc. Davenport Acad. 5: 190. 1889. 

 Baja California. California ; type from lone. 



Shrub with slender, gray or reddish branches ; leaves elliptic or oval-ovate, 

 rounded at base and apex, serrulate, glabrate on the upper surface or minutely 

 velutinous. 



Baja California specimens have been determined as C. sorediatus Hook. & 

 Arn. 



9. Ceanothus coeruleus Lag. Gen. & Sp. Nov. 11. 1816. 

 Ceanothus azureus Desf. Cat. PI. Paris. 232. 1815, nomen nudum. 

 Ceanothus bicolor Willd. ; Roem. & Schult. Syst. Veg. 7: 65. 1829. 

 Ceanothus glandulosus Schlecht. Linnaea 15: 474. 1841. 



Ceanothus azureus parrifolius S. Wats. Proc. Amer. Acad. 23: 270. 1888. 



Ceanothus candoUcaniis Rose, Contr. U. S. Nat. Herb. 12: 283. 1909. 



Ceanothus parrifolius Rose, Contr. U. S. Nat. Herb. 12: 284. 1909. Not C. 

 par vif alius Trel. 1888. 



Sinaloa to Chihuahua, Coahuila, Veracruz, and Chiapas. Guatemala. 



Shrub or small tree, 1 to 7.5 meters high; leaves oblong-lanceolate to ovate, 

 acute or obtuse, serrulate, green above and glabrate or sometimes densely 

 pubescent, covered beneath with a rusty tomentum ; flowers blue or nearly 

 white. " Chaquira " (Oaxaca, Mexico); " chaquirilla " ; " palo Colorado"; 

 " tlaxistle," " tnu-yooco " (Michoacan, Oaxaca, Seler) ; " sayolistle," " cuai- 

 cuastle " (Mexico, Harshbcrger). 



The bark is said to have tonic and febrifuge properties. A decoction of the 

 leaves is used for sore throat, and the decoction of the roots for venereal dis- 

 eases. The species was listed by Sesse and Mocino ' as C. americanus. 



' PI. Nov. Hisp. 38. 1887. 



