394 CONTRIBUTION'S FROM THE NATIONAL HERBARIUM. 



The plant seems to be common from Alamos, Sonora, south to Villa Union, Sinaloa, 

 but was not observed farther south. It grows under various conditions, sometimes 

 on dry hills, again in river valleys, sometimes along arroyos, or even in wet fields. 



6. COLIGNONIA Endl. 



Colignonia Endl. Gen. PI. 311. 1837. 

 Type species, Abronia pannflora H. B. K. 



A genus of four or five species, all South American. It has not been reported from 

 North America before. 



1. Colignonia parviflora (H. B. K.) Endl. Gen. PI. 311. 1837. 



Abronia ■parviflora H. B. K. Nov. Gen. & Sp. 2: 216. 1817. 



Tricratu s parvijlorus Spreng. Syst. Veg. 1: 536. 



Type locality, "Locis scopulosis in dorso Andium Popayensium prope Querchu." 

 Specimen examined: 



Panama: Hayes. 



7. BOUGAINVILLEA Commers. 



Bougainvillea Commers.; Juss. Gen. 91. 1789. 



Josepha Veil. Fl. Flum. 154. 1825. 



Type species, Bovgainvillca spectabilis Willd. 



KEY TO THE SPECIES. 



Stems and petioles, often the leaf blades, glandular-pubescent 1. B. spectabilis. 



Stems and petioles, as well as the leaf blades, glabrous or nearly so. .2. B. glabra. 



1. Bougainvillea spectabilis Willd. Sp. PI. 2: 348. 1798. 

 Tricycla spectabilis Poir. Encycl. Suppl. 5: 358. 1817. 

 Bougainvillea bracteata Peru. Syn. PI. 1: 418. 1805. 

 Bougainvillea brasiliensis Wied-Neuw. Reis. Bras. 1: 44. 1820. 

 Josepha augusta Veil. Fl. Flum. 154. 1825. 

 Bougainvillea virescens Choisy in DC. Prodr. 13 2 : 437. 1849. 

 Type locality, "In Brasilia." 



Specimens examined: 



Mexico: City of Mexico, winter of 1892-3, Mrs. D. H. Sheldon. 



Sonora: Cultivated at Hermosillo, March 9, 1910, Rose, Standley & Russell 12548. 



Honduras: Ruatan Island, Bay of Honduras, 1886, Gaumer 134. 



Salvador: Renson 113. 



Guatemala: Sombrerito, Depart. Santa Rosa, alt. 1,250 meters, March, 1894. 

 Heyde & Lux 6370. 

 One of the handsomest of cultivated plants, this is perhaps the most common orna- 

 mental in Mexico. It decorates the patios of the poorest houses as well as those of 

 the most elaborate ones. It is not native in any part of Mexico but may possibly be 

 so in parts of Central America. 



2. Bougainvillea glabra Choisy in DC. Prodr. 13 2 : 437. 1849. 

 Bougainvillea spectabilis glabra Hook. Curtis's Bot. Mag. pi. 4810. 1854. 

 Bougainvillea rubicunda Schott; Rohrb. in Mart. Fl. Bras. 14 2 : 351. 1872. 



Type locality, "In locis elevatis prov. Rio de Janeiro," Brazil. Type collected 

 by Gaudichaud (no. 423). 



Specimens examined: 



Yucatan: 1896, Valdez9. 



Salvador: Santa Ana, Depart. Santa Ana, alt. 650 meters, November, 1892, 



Shannon 5002. 

 Guatemala: Sepacuite, December 12, 1904, Goll 152. 



