1010 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 



row scales about 10 mm. long; outer perianth segments narrow, reddish to 

 amber, 8 to 10 cm. long, the inner oblong, white ; stamens numerous, white ; 

 style white, thick, 20 em. long; stigma lobes numerous, cream-colored, entire. 

 " Reina de la noche," " junco oloroso ;" " flor de baile " (Venezuela) ; " galdn 

 de noche" (El Salvador). 



2. Epiphyllum caudatum (Vaupel) Britt. & Rose, Contr. U. S. Nat. Herb. 16: 



256. 1913. 



PhyUocactus caudatus Vaupel, Monatsschr. Kakteenk. 23: 116. 1913. 



Oaxaca, the type from Comaltepec. 



Old stems terete and slender ; lateral branches elongate-lanceolate, cuneately 

 narrowed at base into a terete stalk, long-acuminte, 15 to 20 cm. long, 3 to 4 

 cm. wide, the margins low-crenate ; flowers white, the tube slender, about 

 7 cm. long; inner perianth segments about 6 cm. long; ovary and most 

 of the flower tube quite naked. 



3. Epiphyllum darrahii (Sebum.) Britt. & Rose, Contr. U. S. Nat. Herb. 



16: 256. 1913. ■ 



PhyUocactus darrahii Schum. Gesamtb. Kakt. Nachtr. 69. 1903. ^ 



Much cultivated in Mexico ; probably also wild. 



Stems much branched, often terete and woody below ; joints rather thick, 20 

 to 30 cm. long, 3 to 5 cm. wide, deeply lobed, sometimes nearly to the mid- 

 rib, the lobes usually obtuse ; tube of flower 9 cm. long, somewhat curved, 

 greenish ; scales on tube and ovary small, linear, green, appressed ; outer 

 perianth segments 10, linear, spreading or reflexed, acute, 4 cm. long, lemon- 

 yellow ; inner perianth segments pure white, nearly as long as the outer, 

 broader and more erect, short-acuminate ; filaments white, nearly as long as 

 the perianth segments ; style overtopping the stamens, pure white ; stigma lobes 

 8, linear. 



4. Epiphyllum anguliger (Lem.) Don; Loud. Encycl. PI. ed. 3. 1380. 1855. 

 PhyUocactus anguliger Lem. Jard. Fleur. 1: pi. 92. 1851. 



PhyUocactus serratus Brongn. ; Labour. Monogr. Cact. 417. 1853. 



Central and southern Mexico, the type from Matanejo. 



Much branched ; stems and lower branches terete ; upper brandies flattened, 

 with deeply toothed margins, rather fleshy ; areoles small, usually felted and 

 sometimes bearing 1 or 2 white bristles; flower tube stout, without scales, 

 about 8 cm. long; outer perianth segments brownish yellow, the inner white, 

 oblong, acuminate, about 5 cm. long ; style slender, white. " Pitayita del cerro," 

 " jarana de pitahayita," " nopalillo," " nopalillo bianco." 



5. Epiphyllum striatum (Lem.) Britt. & Rose, Contr. U. S. Nat. Herb. 16: 



259. 1913. 



PhyUocactus strictus Lem. Illustr. Hort. Lem. 1: INIisc. 107. 1854. 



Southern Mexico. Central America. 



Plant up to 2 meters long; joints linear, green, 5 to 8 cm. broad, coarsely 

 serrate, stiff; tube of flower 13 to 15 cm. long, slender, green, bearing a few 

 distant scales 8 to 12 mm. long; outer perianth segments greenish pink, the 

 inner white, narrow, acuminate, 6 to 8 cm. long; filaments white; style pink 

 or red ; stigma lobes yellow ; fruit globose, 4 to 5 cm. in diameter ; seeds black. 



6. Epiphyllum stenopetalum (Forst.) Britt. & Rose, Contr. U. S. Nat. Herb. 



16: 259. 1913. 

 PhyUocactus stenopetalus Forst. Handb. Cact. 441. 1840. 

 Oaxaca. 



