u SUPPLEMENT. 



[i. p. 34.] 6*. Draba unilateralis, M. E. Jones in Bull. Torr. Club, ix. p. 124. 

 Noeth Mexico, about fifteen miles south of the Californian boundary, and about sixty 

 miles from San Diego {Jones). 



[i. p. 35.] 1*. Sisymbrium aCUticarpum, M. E. Jones in Amer. Naturalist, 

 xvii. p. 875. 



Noeth Mexico, near the head of the valley of palms, within a few miles of the 

 Californian boundary. 



[i. p. 35.] 1. Sisymbrium auriculatum, A. Gr.,=rThelypodium auriculatum, 

 S. Wats, in Proc. Am. Acad. xvii. p. 321. 



Noeth Mexico, Sierra Madre, Coahuila, and at Lerios {Palmer, 25, 50). Hb. Kew. 



[i. p. 35.] 3. Sisymbrium canescens, Nutt. ; S. Wats, in Proc. Am. Acad, 

 xvii. p. 320. 



Noeth Mexico, near San Luis Potosi {Schaffner). 



[i. p. 37.] 13*. Sisymbrium titaeacense, Walp. ?, Turcz. in Bull. Soc Nat. Mosc 



xxvii. 2, p. 30±{GaleotM, 4682),=S. galeottianum, Fourn. /3. hygrophilum. 



[i. p. 38.] 1. Synthlipsis berlandieri, A. Gr., var. hispida, S. Wats, in Proc 



Am. Acad. xvii. p. 321. 



Texas. — Noeth Mexico, Laredo, Tamaulipas {Berlandier, 157, 1417). 



[i. p. 38.] 2*. Synthlipsis heterochromia, S. Wats, in Proc. Am. Acad. xvii. 

 p. 321. 



Noeth Mexico, Monterey, Nuevo Leon {Palmer, 33). Hb. Kew. 



[i. p. 38.] 3*. Lepidium lasiocarpum, Nutt., Torr., & A. Gr. Fl. N. Am. i. 

 p. 115, var. tenuipes, S. Wats, in Proc. Am. Acad. xvii. p. 322. 



Califoema ; Lowee Califoema. — Noeth Mexico, Parras {Palmer, 41). 



Watson also refers here 21, 22, and 23 of Parry and Palmer's collection ; 14, Baurgeau, 

 and 686, Coulter, which we had identified with various other species. We have not 

 • been able to test his determinations; but it is possible that in this, as in many other 

 instances, we have not had the same species as he ; numbered collections have to be 

 dealt with most cautiously, for too great a reliance on them has led to the propagation 

 of gross errors. 



[i. p. 39.] 1*. Capsella pubens, Benth. et Hook. Gen. PL i. p. 86 ; S. Wats, in 

 Proc. Am. Acad. xvii. p. 322. 

 Hymenolobus pubens, A. Gr. PL Wright, i. p. 9, et ii. p. 14. 



Texas ; New Mexico. — Noeth Mexico, Parras, Coahuila (Palmer, 39). Hb. Kew. 



[i. p. 39.] 1**. Capsella? SChaffneri, S. Wats, in Proc. Am. Acad. xvii. p. 322. 

 Noeth Mexico, San Miguelito Mountains {Schaffner}^ 



