Collections of Not. 4th, 5th & 6 th. were made after reaching 
the Rio Grendef probably} at Santa Barbara (cf. notes forJuly 30 <531 
1851). Judging from the usual speed in travelling this stretch 
of Rio Grande Valley,most of these collection were probably made 
above Las Cruces. They are all certainly from Dona Ana County, 
New Mexico. 
