WOOTON AND STANDLEY—FLORA OF NEW MEXICO. 251 
1. Batrachium drouetii (F. Schultz) Nyman, Bot. Not. 98. 1852. 
Ranunculus drouetii F, Schultz, Arch. Fl. France et Allem, 10, 1842, 
TypE LocaLity: European. 
Rance: Alaska to Vermont, Rhode Island, and Lower California, in the Rocky 
Mountains south to New Mexico. 
New Mexico: Tunitcha Mountains; Taos; Negrito Creek; Middle Fork of the Gila. 
In streams and ponds, in the Transition Zone, 
2. Batrachium trichophyllum (Chaix) Bosch, Prodr. Fl. Bat. 5. 1850. 
Ranunculus trichophyllus Chaix: Viil. Prosp. Pl. Dauph. 1: 335. 1786. 
Ranunculus aquatilis trichophyllus A. Gray, Man. ed. 5, 40, 1867. 
Batrachium aquatile trichophyllum Cockerell, Univ. Mo. Stud. Sci. 22: 122. 1911. 
TyPE LOCALITY: European. 
Rance: British America to North Carolina, California, and Mexico; also in Europe 
and Asia, 
New Mexico: Las Vegas; Vermejo Park. In water, in the Transition Zone, 
8. Batrachium flaccidum (Pers.) Rupr. Fl. Cauc. 15. 1869. 
Ranunculus flaccidus Pers. Ann. Bot. Usteri 14: 39. 1795. 
Ranunculus trichophyllus flaccidus A. Gray, Syn. Fl. 11: 21. 1895. 
Typr Locauity: Not stated. 
Raner: British America to North Carolina and Lower California. 
New Mexico: Canada Creek; Pecos River; Mimbres River; Dulce. Instreams and 
ponds, 
8. RANUNCULUS L. Bourrercvur. 
Annual or perennial herbs with alternate cauline leaves and numerous basal ones; 
flowers solitary or corymbose, yellow or white; sepals usually 5; petals commonly 
conspicuous; achenes capitate, numerous, usually smooth. 
KEY TO THE SPECIES, 
Sepals black-hairy ..........-0------ eee eee ee eee eee eee eee eee ee 1. R. macauleyi, 
Sepals not black-hairy. 
Basal leaves entire. 
Plants with long stolons rooting atthe nodes; petals less 
than 5 mm. long...........-.-.-.----2 2-2 eee 10. R. reptans, 
Plants not stoloniferous; petals more than 5 mm, long, 
often 10 mm, Or MOFe........... 0. cece eee weee ll. R. ellipticus, 
Basal leaves not entire. 
None of the leaves cleft; plants very succulent, stolon- 
IferOUS .....-. 0-22 - eee eee eee eee eee eee eee 2. R. hydrocharoides. 
At least part of the leaves cleft; plants less succulent, 
seldom stoloniferous. 
Stems floating or submerged............ seccccseese & Ry purshii. 
Stems neither floating nor submerged. 
Achenes glabrous, 
Petals short, 3 to 4 mm. long, about equal- 
ing the sepals; cauline leaves long- 
petioled.....................-..... 4. R. eremogenes. 
Petals longer, 8 to 10 mm., much longer 
than the sepals; cauline leaves 
nearly sessile. 
Petals oblong, 8 to 10 mm. long; basal 
leaves parted almost to the 
base.............2....0-------- 5. R, nudatus, 
