1676 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM 



COCHLOSPERMACEAE. 



Page 836. Maximilianea vUiJolia. Among the vernacular names, for "por6- 

 por6" read "poro-poro." "Rosa amarilla" (Sinaloa). 



FLACOURTIACEAE. 



Page 841. Myroxylon velulinum. "Junco" (Sinaloa). The citation for the 

 synonym Xylosma velutinum should read: Triana & Planch. Prodr. Fl. Novogran. 

 97. 1862. 



Page 846. Casearia dolichophylla. " Garrapatilla " (Naj-arit). 



TURNERACEAE. 



Page 847. Erblichia odorata. "Suelda con suelda" (Nayarit). 



lOASACEAE. 



Page 854. Mentzelia conzattii. "Yaga-duchi" (Oaxaca, Zapotec, Reko). 

 Page 855. After Petalonyx linearis insert the following genus: 



EUCNIDE Zucc. Del. Sem. Hort. Monac. 28. 1844. 

 1. Eucnide cordata Kell.; Curran, Bull. Calif. Acad. 1: 137. 1885. 

 Baja California, the type from Cedros Island. A low shrub, 



CACTACEAE. 



Page 862. After Pereskiopsis aquosa add: 



Pereskiopsis scandens Britt. & Rose, Cactaceae 4: 252. 1924. Yucatan, 

 the type from M^rida. 



Page 889. After Opuntia chaffeyi add: 



Opuntia arenaria Engelm. Proc. Amer. Acad. 3: 301. 1856. Northern 

 Mexico near the United States boundary. Also in western Texas and southern 

 New Mexico. 



Opuntia alamosensis Britt. & Rose, sp. nov. 



Shrub 1 meter high or so, very much branched above; joints bright green; 

 tubercles prominent, elongate; areoles circular, brown-felted; spines on young 

 branches 3 or more, long-acicular, up to 4 cm. long, brown, covered with a loose 

 papery sheath; glochids numerous, whitish to brown; flowers j-ellow, 3 to 4 cm. 

 long, including the ovary; ovary strongly tubercled; areoles subtended by small 

 ovate leaves and often bearing 1 slender spine or more, 2.5 cm. long; fruit not 

 seen. 



Tj'pe collected by J. G. Ortega near La Cruz, Sinaloa, Mexico, in 1924 (no. 

 5235; U. S. Nat. Herb. no. 1,209,382). 



This seems to be the same as the plant obtained by Rose near Alamos, 

 Sonora, in 1910, which is referred to under 0. kleiniae in the Cactaceae (1: 51). 

 It differs from that species in its more spiny branches and yellow flowers. 



Opuntia feroacantha Britt. & Rose, sp. nov. 



Bushy shrub with large joints and very formidable spines, glabrous through- 

 out; joints oblong to obovate, 1.5 to 2.5 cm. long, more or less cuneate at base; 

 areoles rather few, 2 to 4 cm. apart, rather large, circular, brown-felted; glochids 

 yellow, numerous; spines usually 1 or 2, sometimes a third or even a fourth one 

 but these shorter, the longest one sometimes 8 cm. long or even longer, dull 

 white or becoming brownish at base in age, very stout, often twisted; flowers 

 small, rotate, about 4 cm. broad; petals yellow, 1.5 cm. long; filaments very short; 

 stigma lobes about 7. 



Type from Sinaloa (J. G. Ortega 5228; U. S. Nat. Herb. no. 1,209,383). Also 

 collected at Aeaponeta, Tepic, Rose, Standley & Russell 1447. 



