120 MISSOURI BOTANICAL GARDEN. 



River, Bigelow, 1853-4 ; Healdsburg, Bryant, July 1887 

 Napa Co., Brandegee Aug. 1888; Folsom, Brandegee 

 July 1883; Adobe Flats, Mrs. Austin, July 1884, 118 

 Mt. Tamalpais, Jepson, Sept. 9, 1892, and Brandegee, July 

 1891; Yosemite, Torrey, 1872; Yreka, Greene, 1876, 947 

 Monterey, Nuttall; Auburn, Vasey, Oct. 1880; Peru 

 Creek, Rothrock, 1875, 235; Truckee, Jones, 1881, 392a 

 Nevada Co., Jones, 1881, 2715), Nevada (Carson City 

 Anderson, 1864, 26, 54, 118; Yolo, Brandegee, Sept. 20 

 1892; Palisades, Brandegee, 1886; Modoc Co., Mrs. Aus- 

 tin, Aug. 1885; Verano, Heaton, 1888; Sta. Cruz Mts., 

 Price, 1890; Ukiah, Mrs. McCowen, June 1892), and 

 Lower California (Orcutt, July 30, 1883). 



The typical, usually green form, with ample serrate 

 leaves, large bracts and dense inflorescence, passes into a 

 grayer form with longer spikes and smaller bracts, and this 

 in turn grades into var. • of Torrey and Gray's Flora, 

 which is the Oenothera salicina of Nuttall, and is very 

 canescent, with narrower leaves and bracts, smaller flowers 

 and slenderer capsules. Variety imbricata Greene, is a 

 virgate form, in wet ground becoming six or seven feet 

 high, with the floriferous branches as much as two feet 

 and a half long (Jepson, Erythea, i. 241 and 244). I do 

 not see how to separate these forms as even varieties, 

 although as here defined, densifiora is far more variable 

 than the other species of the genus. Specimens from 

 California (Yreka, Greene, 1876, 853; Sta. Lucia Mts., 

 Vasey, July 1880), and Washington (Falcon Valley, 

 Suksdorf, Aug. 3, 1882, 56, July 30, 1885, 343, 557 and 

 558), are variously intermediate between this species and 

 stricta, in bract, flower, capsule and seed characters, as 

 well as in habit, and are indicative of hybridity or a possible 

 intermediate species which I cannot define. 



A portion of Hall 188 is Oenothera lepida, var. parvi- 

 fiora, as noted by Mr. Watson on several sheets ; but this 

 may be distinguished by its larger acuminate buds, more 

 strigose pubescence above, larger capsules and entire leaves 



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