STANDLEY TREES AND SHRUBS OF MEXICO. 1097 



11. Arctostaphylos minor (Small) Standi. 

 Comarostaphylis minor Small, N. Amer. Fl. 29: 89. 1914. 

 Type collected near Miquihuana, Tamaulipas. 



Branchlets glabrous or nearly so ; leaves linear-oblong, 1.5 to 3 cm. long, 

 obtuse, glabrous above, paler and minutely puberulent beneath ; corolla 4 to 

 5 mm. long; fruit 3 to 4 mm. in diameter. 



12. Arctostaphylos lanata (Small) Standi. 

 ConiarostaphylhS lanata Small, N. Amex*. Fl. 29: 88. 1914. 

 San Luis Potosi; type from Buena Vista. 



Branchlets glandular-hirsutulous, densely leafy; leaves oblong or elliptic- 

 oblong, 4 to 6.5 cm. long, acute or mucronate, the margins strongly revolute, 

 hirtellous above; corolla 6 mm. long; fruit 4 to 5 mm. in diameter. 



13. Arctostaphylos caeciliana Loesener, Bull. Herb. Boiss. 2: 553. 1894. 

 Comarostaphylis caeciliana Small, N. Amer. Fl. 29: 88. 1914. 



Oaxaca ; type from Huitzo. 



Branchlets tomentulose ; leaves 3 to 6 cm. long, obtuse or acute, the margins 

 subrevolute, green and glabrate above, densely tomentulose beneath ; corolla 

 5 mm. long; fruit 4 to 5 mm. in diameter. 



14. Arctostaphylos polifolia H. B. K. Nov. Gen. & Sp. 3: 277. 1819. 

 Arctostaphylos oaxacana DC. Prodr. 7: 585. 1839. 

 Arctostaphylos mucronifera DC. Prodr. 7: 585. 1839. 

 Arctostaphylos ledifolia Mart. & Gal. Bull. Acad. Brux. 9^: 536. 1842. 

 Arctostaphylos latifoUa Mart. & Gal. ; Walp. Repert. Bot. 2: 726. 1843. 

 Comarostaphylis miicronnfera Klotzsch, Linnaea 24: 76. 1851. 

 Comarostaphylis mucronata Klotzsch, Linnaea 24: 76. 1851. 

 Comarostaphylis polifolia Klotzsch, Linnaea 24: 77. 1851. 

 Comarostaphylis hartwcgiana Klotzsch, Linnaea 24: 77. 1851. 

 Arctostaphylos hartwcgiana Hemsl. Biol. Centr. Amer. Bot. 2: 278. 1881. 

 Arctostaphylos mucronata Hemsl. Biol. Centr. Amer. Bot. 2: 279. 1881. 

 Comarostaphylis microcarpa Small, N. Amer. Fl. 29: 88. 1914. 



Sinaloa to San Luis Potosi, Tlaxcala, and Oaxaca ; type from Villapando. 



Shrub or tree, 1 to 6 meters high, the branchlets puberulent or glandular- 

 hirtellous ; leaves linear to narrowly oblong, 3 to 7 cm. long, obtuse or acute, 

 glabrous above, tomentulose or glabrate beneath, the margins often revolute; 

 corolla 7 to 9 mm. long; fruit 3 to 6 mm. in diameter. "Madrono" (Oaxaca, 

 Sinaloa); " madroiio chino " (Sinaloa) ;" pinglieca," " pingiiica " (Morelos, 

 Oaxaca) ; " tnu-tqu6 " (Oaxaca, Seler). 



The species is somewhat variable and several segregates were recognized 

 by Small. The key characters which he used to distinguish them are. how- 

 ever, utterly worthless. 



15. Arctostaphylos bicolor (Nutt.) A. Gray, Proc. Amer. Acad. 7: 366. 1868. 

 Xylococcus Ucolor Nutt. Trans. Amer. Phil. Soc. II. 8: 259. 1843. 

 Arctostaphylos veatchii Kellogg, Proc. Calif. Acad. 2: 19. 1863. 



Northern Baja California ; Cedros Island. Southern California. 



Shrub with grayish branches ; leaves ovate to oval, 2 to 6 cm. long, obtuse, 

 green and glabrate above; corolla white or pink, 8 to 9 mm. long; fruit 6 to 

 8 mm. in diameter. 



16. Arctostaphylos g'lauca Lindl. Bot. Reg. 21: pi. 1191. 1836. 

 Mountains of Baja California. California. 



Shrub or small tree, sometimes 7.5 meters high, with a trunk 30 cm. in 

 diameter, glabrous throughout; leaves oval, rounded, or broadly ovate, 2 to 

 5 cm. long, rounded at apex and base, pale green, very thick; corolla white. 



