Scolymus hispanicus L. Erythea 4:145. 1896. 



Geranium parviflorum L. Erythea 4:145. 1896. 



New Station for two Plants. Erythea 4:151. 1896. 



Centaurea calcitrapa L. Erythea 4:175. 1896. 



The Plant Inhabitants of Knob Hill, San Francisco. Erythea 6:61-67. 1898. 



Another Introduced Plant. Erythea 7:176. 1899. 



On the Occurrence of Rhagadiolus hedypnois All. in North America. Zee 5:35, 

 36. 1900. 



Atriplex semibaccata R. Br. in Marin County. Zoe 5:136, 137. 1901. 

 Essig, E. O. 



Russian Thistle in Ventura County. Ventura Co. Hort. Comm. Bull. 1:1-16. 1910. 



The Caltrop, or Ground Bur-nut. Monthly Bull. Cal. Hort. Comm. 3:78, 79. 

 1914. 



Two interesting Weeds. Monthly Bull. Cal. Hort. Comm. 7:39. 1918. 

 Greene, E. L. 



On the Distribution of some Western Plants. Erythea 1:181-184. 1893. 

 Hall, H. M. 



The Relation of Farm Weeds to Hay Fever. Monthly Bull. Cal. Hort. Comm. 

 6:44-47. 1917. 

 Hickman, J. B. 



The Russian Thistle, its Control and Eradication. Monthly Bull. Cal. Hort. 

 Comm. 6:442, 443. 1917. 

 Hilgard, E. W. 



The Weeds of California. Gard. & For. 4:316, 317; 328, 329; 375, 376; 424, 425; 

 457, 458. 1891. Reprinted in Rept. Agr. Exp. Sta. Univ. Cal. 1890, 238-252. 

 1891. 

 Jepson, W. L. 



Alien Plants in California. Erythea 1:141, 142. 1893. 

 Kennedy, P. B. 



Seed Inspection and Weed Control. Monthly Bull. Cal. Hort. Comm. 7:160. 1918. 

 Knowiton, K. S. 



The Weeds of Kern County. Monthly Bull. Cal. Hort. Comm. 4:159, 160. 1915. 



Suggestions on Weed Control. Monthly Bull. Cal. Hort. Comm. 6:430, 431. 1917. 

 Leeds, B. F. 



Notes on the Introduced Plants of Santa Clara. Zoe 2:124-126. 1891. 

 Moxley, G. L. 



Bidens frondosa L. Lorquinia 2:21. 1917. 

 Newman, O. W. 



Weed Notes from County Commissioners. Monthly Bull. Cal. Hort. Comm. 

 4:275, 276. 1915. 



Weed Dissemination. Monthly Bull. Cal. Hort. Comm. 4:467-472. 1915. 



The Yellow Star Thistle. Monthly Bull. Cal. Hort. Comm. 6:27-29. 1917. 



Canada Thistle. Monthly Bull. Cal Hort. Comm. 6:48-51. 1917. 



Wild Mustard Control. Monthly Bull. Cal. Hort. Comm. 6:219-224. 1917. 

 Pammel, L. H. 



Notes on the Weeds of California. Proc. Iowa Acad. Sci. 23:489-493. 1916. 

 Parish, S. B. 



Notes on the Naturalized Plants of Southern California. Zoe 1:7-10; 56-59; 

 123-126; 182-188; 205-210; 261-265; 300-303; 2:26-34. 1890, 1891. 



Notes on some Introduced Plants of Southern California. Muhlenbergia. 5:109- 

 115; 121-128. 1913. 



Plants introduced into a Desert Valley as a Result of Irrigation. Plant World 

 16:275-280. 1913. 



Circulating Pests. Cal. Cultivator 40:434. 1914. 

 Shinn, C. H. 



The Russian Thistle in California. Agric. Exp. Sta. Univ. Cal. Bull. 197:1-16. 

 1895. 

 Vaslit, F. H. 



Escapes in the Coast Range. Zoe 1:86. 1890. 



SYSTEMATIC CATALOGUE 

 NAJADACEAE 

 Potamogeton crispus L. 



Abundant in the Santa Ana River near Corona, Johnston in 1918. Not other- 

 wise known from the state. Native of Europe. 



ALISMACEAE 

 Sagittaria latifolia Wild. 



Increasingly freauent on the marshy borders of small streams. San Bernardino; 

 appeared first in 1890. Los Angeles, Braunton in 1902. Regarded as native in the 

 tule marshes of central California, but in the south introduced through use by 

 Chinese, who eat the tubers. 



GRAMINEAE 



Holcus halepensis L. Johnson Grass. Means Grass. 



Introduced into California about 1884 as a valuable _ forage grass, and for a 

 few years cultivated to a limited extent, but found undesirable; soon escaping, and 

 now a frequent and troublesome weed in orchards, farms, and other irrigated 

 lands, and in waste places. In the Colorado Desert, a single clump, at El Centro, 

 Parish in 1913. First introduced into the LTnited States in 1830, by a cotton expert, 

 who was sent to Turkey by Governor Means, of South Carolina, and v/ho brought 



