50 Plants of San Franciico. 



bare stony hills it is low and decumbent, but in the ravines and 

 sheltered spots it reaches 6-8 feet. 



1 14 a. HosACKiA STRiGOSA Nutt. T. & G. Fl. i, 326. Along- 

 the railway, Point Lobos. April — May. 



142 a. Tellima affinis (Gray. Proc. Am. Acad, vi, 534). The 

 most common species in our limits. March — May. 



153 a. Callitriche sepulta Wats. Proc. Am. Acad, xiv, 298. 

 Surface of mud about pools, Presidio. April — May. 



EcHiNOCYSTis Marah Wats. This species was supposed to be 

 extinct within our limits, but it still persists in the gorse thickets 

 near Visitacion Valley. 



Apiastrum angustifolium Nutt. T. & G. Fl. i, 644. Point 

 Lobos, South San Francisco, Visitacion Valley. April — May. 



204 a. Galium Californicum H. & A. Bot. Beech. 349. South 

 San Francisco, Visitacion Valley. April — ^June. 



255 a. Layia calliglossa var. oligoch^ta Gray. Fields at 

 the upper end of Visitacion Valley. April. 



285 a. Cnicus arvensis (L. spec. 1149.) About the base of Tel- 

 egraph Hill. May— October. " Canada Thistle. " 



The spread of this plant is to be dreaded; though apt to be less 

 troublesome in our dry climate than in the eastern states, it will be 

 difficult to eradicate from irrigated fields and borders of ditches. 



Centunculus minimus L. spec. 169. Cliffs between Lobos Creek 

 and Fort Point, and very abuncrant about the Presidio in com- 

 pany with Microcala qiiadrangrdaris. April. 



328 a;. Nemophila parviflora Benth. Trans. Linn. Soc. xvii, 

 275. Common in rocky bushy places. March — May, 



329 a. Nemophila aurita Lindl. Bot. Reg. t. 1601. Near the 

 northern base of a high hill in South San Francisco. April — May. 



334 «. Phacelia Douglasii (Benth. Trans. Linn. Soc. xvii, 

 276). Near Lake Merced. April — May. 



370 a. Orthocarpus attenuatus Gray. Pac. R. Rep. iv, 121. 

 Potrero. April. 



372 a. Orthocarpus faucibarbatus Gray. Pac. R. Rep. iv, 

 121. Presidio, Potrero, Visitacion Valley. April. 



? Equisetum arvense L. Marshy banks and ditch sides. Visi- 

 tacion Valley. 



