614 CONTEIBUTIONS FROM THE NATIONAL HEKBAEIUM. 



KEY TO THE SPECIES. 



Racemes 10 to 20 cm. long; staminate flowers large, not punctate- 

 glandular 1. E. confusus. 



Racemes shorter, mostly less than 10 cm. long; staminate flowers 



smaller, conspicuously punctate-glandular 2. E. wrightii. 



1. Echiaopepon confusus Rose, Contr. U. S. Nat. Herb. 5: 115. 1897. 



Type locality: Pinos Altos Mountains, New Mexico. Type collected by Greene. 

 Range: Mountains of southwestern New Mexico. 

 New Mexico: Copper Mines. 



2. Echinopepon wrightii (A. Gray) S. Wats. Bull. Torrey Club 13: 158. 1887. 

 Elaterium wrightii A. Gray, PI. Wright. 2: 61. 1853. 



Echinocystis wrightii Cogn. M^m. Acad. Sci. Belg. 28: 88. 1878. 

 Type locality: Mountains near Guadalupe Pass, New Mexico. Type collected by 

 Wright (no. 1090). 

 Range: Southern New Mexico and Arizona and adjacent Mexico. 

 New Mexico: Guadalupe Pass. 



3. SICYOS L. One-seeded bur cucumber. 



Slender climbing vines with lobed leaves and branched tendrils; flowers monoecious, 

 the staminate in racemes or corymbs, the hypanthium broadly campanulate or nearly 

 flat, the corolla whitish or pale yellow, rotate, 5-lobed; stamens with their filaments 

 united into a column, the anthers 2 to 5, distinct or united; pistillate flowers usually 

 clustered at the end of a peduncle arising from the same node as the longer stami- 

 nate peduncle; ovary 1-celled, bristly, glandular, or glabrous; ovule solitary, pendu- 

 lous; fruit not inflated, thin-walled, indehiscent. 



key to the species. 



Fruit glabrous 1. S. glaber. 



Fruit hispid. 



Lobes of the leaves triangular, attenuate, the basal sinus 



usually broad and open 2. S. parvijlorus. 



Lobesoftheleavesroimded, obtuse, thesinususuallyclosed. 3. S. ampelophyllus. 



1. Sicyos glaber Wooton, Bull. Torrey Club 25: 310. 1898. 



Type locality: Organ Mountains, south of San Augustine Ranch, New Mexico. 

 Type collected by Wooton (no. 606). 

 Range: Organ Mountains of New Mexico, in the Upper Sonoran Zone. 



2. Sicyos parviflorus Willd. Sp. PI. 4: 626. 1805. 

 Type locality: Mexico. 



Range: Western Texas and southern Arizona to Mexico. 



New Mexico: Fort Bayard; Teel; White Mountains; Gray. Canyons, in the Up- 

 per Sonoran and Transition zones 



3. Sicyos ampelophyllus Woot. & Standi. Bull. Torrey Club 36: 111. 1909. 

 Type locality: Kingston, Sierra County, New Mexico. Type collected by Met- 

 calfe (no. 1195). 



Range: Southwestern New Mexico and adjacent Arizona. 



New Mexico: Kingston; Fort Bayard; Burro Mountains; Sapello Creek; Gila; Santa 

 Rita. 



4. IBERVILLEA Greene. 



Climbing herbaceous vines from thickened roots; leaves deeply 3 to 5-lobed; flowera 

 small, dioecious, the staminate ones in racemes, the pistillate ones solitary in the 

 axils; hypanthium cylindric or cyUndric-campanulate; corolla salverform, yellow; 



