220 Muhlenbergia, Volume 2 



RHAMIVACEAE 



Rhamnus californica Esch. Mem. Acad. Petrop. 10: 281. 



1826. 



Rhamnus oleifolia Hook. Fl. Bor. Am. 1: i2Tf. pi. 44. 1830, 



Rhamnus laurifolia Nutt.; T. & G. Fl. N. A. 1: 260. 1838. 



No. 8388, collected June 12, near the summit of Mt. Tam- 



alpais, Marin county, in flower. This station, at almost 3000 



feet was an unexpected one, since the typical plant grows on 



sand hills near the coast, the original from San Francisco. 



No. 8417, collected July 31, near Del Monte, Monterey 

 county, in sand along the railroad. This is perhaps the plant 

 called R, laurifolia by Nuttall, collected near Monterey, but it 

 does not seem to be distinct. It occurs here as symmetrical 

 clumps of shrubs, six or seven feet high. 



No. 8418, collected July 31, near Del Monte, Monterey 

 county, in sand along the railroad, the leaves whitened under- 

 neath but not tomentellus. Probably the form called R. olei- 

 folia^ but in the fruiting state there is no discernible difference 

 except the whitened under side of the leaf. It grew only a few 

 feet from no. 8417, resembling it in habit and appearance, dif- 

 fering only in the color of the under side of the leaf. 



Rhamnus cuspiDATA Greene, Leaflets, 1: 64. 1904. 



No. 8139, collected April 11, in Madera county, on grassy 

 slopes near the San Joaquin river about three miles above Pol- 

 lasky. A large spreading shrub growing in clumps, about ten 

 feet high. This was at once recognized as differing from any 

 form seen by the writer in its peculiar spreading habit, gray 

 bark, shape and pubescence of the leaves. The type was col- 

 lected *'near Tehachapi," Kern county. 



Ceanothus vestitus Greene, Pittonia, 2: loi. 1890. 



No. 8223, collected May 10, along the base of the foothills 

 south of Bishop, Inyo county, growing in coarse granite sand. 



