1100 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 



4. Arbutus peninsularis Rose & Goldm. Contr. U. S. Nat. Herb. 13: 312. 1911. 

 Type from Sierra de la Laguna, Baja California. 



Tree; leaves short-petiolate, oval or oval-ovate, 5 to 11 cm. long, obtuse, 

 rounded at base, entire or serrulate, lustrous above; corolla 6 to 7 mm. long. 

 Probably only a form of A. arizonica. 



5. Arbutus donnell-smithii Small, N. Amer. Fl. 29: 85. 1914. 

 Chiapas. Guatemala ; type from San Lucas. 



Tree, 4.5 to 6 meters high ; leaves long-petiolate, oblong to ovate, 5 to 10 

 cm. long, obtuse or acute, rounded or obtuse at base, entire or serrulate ; co- 

 rolla 6 to 7 mm. long ; fruit about 1 cm. in diameter. 



6. Arbutus spinulosa Mart. & Gal. Bull. Acad. Brux. Q^: 532. 1842. 

 Type from Monte Tancitaro, MichoacJln. 



Leaves oblong, oblong-lanceolate, or obovate, 4 to 7 cm. long, acute, rounded 

 at base, serrate ; corolla 6 to 7 mm. long. 



7. Arbutus xalapensis H. B. K. Nov. Gen. & Sp. 3 : 279. 1819. * 

 Arhutvs dcnsiflm-a H. B. K. Nov. Gen. & Sp. 3: 280. 1819. 

 Arhutus mollis H. B. K. Nov. Gen. & Sp. 3: 280. 1819. 

 Arbutus petiolaris H. B. K. Nov. Gen. & Sp. 3: 281. 1819. 

 Arhutus lauri folia Lindl. Bot. Reg. 25: pi. 67. 1839. 

 Arbutus varians Benth. PI. Hartw. 77. 1841. 



Arbutus floribunda Mart. & Gal. Bull. Acad. Brux. 9^: 534. 1842. 



Arbutus macrophylla Mart. & Gal. Bull. Acad. Brux. 9^: 534. 1842. 



Arbutus paniculata Mart. & Gal. Bull. Acad. Brux. 9^: 535. 1842. 



Arbutus pruni folia Klotzsch, Linnaea 24: 73. 1851. 



Arbutus texana BuckL Proc. Acad. Phila. 1861: 460. 1862. 



Chihuahua and Nuevo Leon to Veracruz, Oaxaca, and Sinaloa ; type from 

 Jalapa, Veracruz. Guatemala ; western Texas and southern Neve Mexico. 



Shrub or tree, sometimes 15 meters high, the bark thin, red-brown, peeling 

 off in large papery sheets ; leaves oblong to ovate or oval, 3 to 10 cm. long, 

 acute to rounded at apex, entire or serrate, usually tomentose beneath when 

 young, glabrate in age; corolla white, 7 mm. long; fruit dark red, 8 to 10 

 mm. in diameter; wood hard, close-grained, reddish brown, its specific gravity 

 about 0.75. "Madrono" (Chihuahua, Durango, Oaxaca, Mexico, Sinaloa, San 

 Luis Potosi) ; " nuzu-ndu " (Oaxaca, Seler) ; " manzanita " (Durango). 



The wood of this and other species is useful for various purposes. 



DOUBTFUL SPECIES. 



Arbutus ovata Mart. & Gal. Bull. Acad. Brux. 9*: 533. Type from Oaxaca. 

 According to Small, probably a species of OauWieria. 



7. PERNETTIA Gaud. Ann. Sci. Nat. 5: 102. 1825. 



1. Pernettia ciliata (Schlecht. & Cham.) Small, N. Amer. Fl. 29: 82. 1914. 



Oaultheria ciliata Schlecht. & Cham. Linnaea 5: 126. 1830. 



Pernettia pilosa G. Don, Hist. Dichl. PI. 3: 837. 1834. 



Pernettia ciliaris G. Don, Hist. Dichl. PL 3: 837. 1834. 



Pernettia buxifolia Mart. & Gal. Bull. Acad. Brux. 9^: 538. 1842. 



Oaultheria hirsuta Mart. & Gal. Bull Acad. Brux. 9^: 540. 1842. 



Pernettia seleriana Loesener, Bull. Herb. Boiss. II. 3: 217. 1903. 



High mountains, Michoaciin to San Luis Potosi, Veracruz, and Chiapas. 



Low shrub, 60 cm. high or less, the branchlets hirsute; leaves alternate, 

 short-petiolate, persistent, narrowly oblong to oval, 1 to 2.5 cm. long, acute 



