202 Southern Extension of California Flora. [zoE 



Bay and San Quintin. All plants mentioned in these publi- 

 cations as having been collected about San Quintin and farther 

 south have been omitted from the following list. The writer 

 made an excursion in May during the present year to San Pedro 

 Martir, starting from San Diego, and the appended list contains 

 names of plants collected at their most southern known habitat, 

 and on this account is not a complete one of the flora of San 

 Pedro Martir as it might seem from the frequency with which 

 the name of this mountain appears: 



Ranuncttlus aquatilis ly. Common in and about the ponds of 

 San Pedro Martir. 



Ranunculus hydroch a routes Gray. Very abundant in the 

 ponds of San Pedro Martir. 



Aquilegia truncata F. & M. Common on San Pedro Martir. 



Ronineya Coulteti Harv. This is often seen along the valleys 

 between Tia Juana and Colnett, and it is abundant on the hills 

 about San Pedro Martir. 



Dendroniecon riri.iuni Benth. Along the edge of the plateau 

 of San Pedro Martir. 



Ptxpaver Calif jrnicuin Gray. On burned ground twenty miles 

 south of Tia Juana. 



Arabis Holbvellii Hornem. San Pedro Martir. 



Vesicaria Fendteri Gray. San Pedro Martir. 



Barbai'ea vulgaris R. Br. Common at the locality known as 

 I,a Grulla, where it was probably introduced. 



Cardamine pauciseda Benth. Carton Salado. 



Viola peduncutata T. & G. Colnett. 



Arenaria alsinoides Willd. San Pedro Martir, perhaps its 

 northern limit. 



Calyptridiuni nwnandru/u N nit. Abundant from near Colnett 

 to San Pedro Martir. 



Montia fontana I,. Very small plants growing amongst other 

 vegetation in damp soil on San Pedro Martir. 



Sidalcea malvceflora Gray. Growing in the wet meadows of 

 San Pedro Martir. 



