WOOTON AND STANDLEY—FLORA OF NEW MEXICO. 613 
KEY TO THE GENERA. 
Ovary 2 or 3-celled; ovules solitary or few in the cell. 
Plants perennial; fruit ovoid or globose, with 1 to 4 
seeds in each cell; seeds turgid, rounded at 
both ends, smooth................-- . 1. Maran (p. 613). 
Plants annual; fruit oblong, attenuate at each ‘end; 
with 2 to 6 seeds in each cell; seeds small, 
flattened, rugose...........--..------------- 2. ECHINOPEPON (p. 613). 
Ovary 1-celled; ovules solitary or numerous. 
Ovules solitary, pendulous; fruit dry............... 3. Sicyos (p. 614). 
Ovules numerous, borne on 3 to 5 placente, mostly 
horizontal; fruit various. 
Anthers straight or merely curved; slender or 
coarse vines. 
Slender climbing vine; flowers dicecious; 
fruit a berry..........---...------- 4, IBERVILLEA (p. 614). 
Coarse prostrate vine; flowers moncecious; 
fruit a leathery pepo..............--. 5. APODANTHERA (p. 615). 
Anthers much contorted; coarse prostrate vines, 
Anthers cohering in a head; plants ill- 
scented .......... eee eee eee eee eee 6. Cucursira (p. 615). 
Anthers distinct or but slightly cohering; 
plants not ill-scented. 
Tendrils branched; leaves deeply lobed; 
connective not produced beyond 
the anthers.................... 7. Crrrutyus (p. 615). 
Tendrils not branched; leaves not deep- 
ly lobed; connective produced 
beyond the anthers.............. 8. Cucumis (p. 616). 
1. MARAH Kellogg. 
Herbaceous vine climbing by tendrils, with thin lobed leaves and small moncecious 
flowers; staminate flowers in racemes or panicles; hypanthium broadly campanulate; 
sepals 5 or 6; corolla white or greenish, rotate, 5 or 6-lobed; stamens 2 or 3, the fila- 
ments united, the anthers nearly horizontal; pistillate flowers usually solitary, some- 
times clustered in the axils, their calyx and corolla similar to those of the staminate 
flowers; staminodia more or less prominent; ovary echinate, 1 to 4-celled; ovules 1 to 
4in each cell; fruit echinate, fibrous within. 
1. Marah gilensis Greene, Leaflets 2: 36. 1910. 
Megarrhiza gilensis Greene, Bull. Torrey Club 8: 97, 1881. 
Echinocystis gilensis Greene, Bull. Calif. Acad. 1: 189. 1885. 
Micrampelis gilensis Britton, Trans. N. Y. Acad. 8: 67. 1889. 
Type LocaLity: In deep sand on the banks of the upper Gila River and its tribu- 
taries, New Mexico. Type collected by E. L. Greene. 
RanGE: Southwestern New Mexico and adjacent Arizona. 
New Mexico: Burro Mountains (Rusby 141). 
2. ECHINOPEPON Naud. 
Annual herbs with cordate, entire or parted leaves; flowers monecious, the stami- 
nate in long racemes, with 5-lobed limbs; pistillate flowers solitary; ovary ovoid, 
beaked, hispid or echinate, usually 3-celled. 
