WOOTON AND STANDLEY PLOEA OF NEW MEXICO. 615 



stamens 3, the connective not i^roduced beyond the anthers; ovary 1-celled, with 2 

 or 3 placentae, the stigma 3-lobed ; berry globose, red, the seeds somewhat swollen. 



1. IberviUea tenuisecta (A. Gray) Small, Fl. Southeast. U. S. 1136. 1903. 



Sicydium Undheimeri tenuisecta A. Gray, PI. Wright. 1: 75. 1852. 



Type locality: "Dry sandy soil, near the Rio Grande, Texas, and New Mexico," 



Range: Western Texas to New Mexico and Chihuahua. 



New Mexico: Dog Spring; above Rincon; Tortugas Mountain; Organ Mountains; 

 Guadalupe Mountains. Sandy mesas and low hills, in the Lower Sonoran Zone. 



5. APODANTHERA Arn. Mel6n loco. 



Rough prostrate coarse vines having a very disagreeable odor, from thick perennial 

 roots; leaves round-reniform, entire or lobed; flowers large, yellow, monoecious, the 

 staminate racemose or corymbose from the lower axils, the pistillate solitary in the 

 upper axils; calyx tube subcylindric; anthers distinct, sessile, dorsally fixed; ovary 

 1-celled, with 3 placentae; seeds horizontal, numerous; fruit 7 to 10 cm. in diameter, 

 nearly spherical, ridged, with a tough or somewhat woody rind. 



1. Apodanthera iindulata A. Gray, PI. Wright. 2: 60. 1853. 



Type locality: "In valleys from Eagle Springs to the Limpio," Texas. 



Range: Western Texas to southern Arizona and southward. 



New Mexico: Near White Water; mesa west of Organ Mountains; Mangas Valley. 

 Dry sandy mesas, in the Lower Sonoran Zone. 



6. CUCTJRBITA L. Gourd. 



Coarse, rough, usually ill-scented, prostrate, tendril-bearing, herbaceous vines from 

 thickened roots; leaves large, nearly entire or lobed; flowers large, showy, yellow, 

 monoecious, solitary in the axils; hypanthium of staminate flowers campanulate or 

 rarely tubular, that of the pistillate flowers subglobose; stamens 3, the filaments 

 distinct, the anthers linear, coherent, contorted; staminodia in pistillate flowers 3; 

 ovary 1-celled, with 3 to 5 placentae; fruit a pepo, usually large (in ours 8 cm. in 

 diameter or less), woody. 



KEY TO THE SPECIES. 



Leaves deltoid-ovate, entire or angled 1. C. foetidissima. 



Leaves 5-lobed to the base 2. C, digitata. 



1. Cucurbita foetidissima H. B. K. Nov. Gen. & Sp. 2: 123. 1817. 

 Cucurhita perennis A. Gray, Best. Journ. Nat. Hist. 6: 193. 1850. 

 Type locality: "Prope Guanaxuato Mexicanorum, altit. 1080 hexap." 

 Range : Nebraska and Missouri to California and Texas and southward. 



New Mexico: Black Range; Socorro; Dog Spring; Albert; Nara Visa; mesa west 

 of Organ Mountains; Eagle Creek. Plains, in the Lower and Upper Sonoran zones. 



2. Cucurbita digitata A. Gray, PI. Wright. 2: 60. 1853. 



Type locality: Between the Copper Mines and Condes Camp, New Mexico. 

 Type collected by Wright (no. 1088). 



Range : Southwestern New Mexico and adjacent Arizona. 



New Mexico: Lordsburg; mesa south of Gila; near White Water. Dry sandy 

 plains, in the Lower Sonoran Zone. 



7. CITRULLTJS Forsk. 



1. CitruUus citruUus (L.) Small, Bull. Torrey Club 25: 606. 1898. Watermelon. 

 Cucurbita citruUus L. Sp. Pi. 1010. 1753. 

 CitruUus vulgaris Schrad.; Eckl. & Zeyh. Enum. PI. Afr. Austr. 279. 1834-7. 



