l6o CALIFORNIA ACADEMY OF SCIENCES. [Proc. 3D Ser. 



Dunal (1852), in De Candolle's Prodiomus, substantially 

 repeated the above diagnosis for the original species, and 

 added to it two others. The significant points in the 

 descriptions of these species are that the one, ^S". <(cnis- 

 toidcs, is characterized as ''ramulostssimis pilosis,''' and the 

 o\.\\(tY , S . calif o7-nicum , as '■'■ tomentosis candicinUihics.'" The 

 first of these was founded on a specimen collected in Cali- 

 fornia by Douglas, and the latter on another plant from the 

 same region and collector, and one of Pavon's from "Nova 

 Hispania." 



In 1876, Dr. Gray, in a contribution to the Proceedings 

 of the American Academy, reduced Dunal's two species to 

 the original Eschscholtzian S. uinhcllifcrum, making the 

 branched hairs of the pubescence the essential character of 

 that species, and at the same time proposing a new species, 

 S . xaiUi, for the reception of certain plants which had since 

 come to hand, and in which the pubescence was of "simple 

 and few-jointed hairs, some of them glandular." No type 

 is specified, but reference is made to specimens collected 

 by Xantus de Vesey, Bigelow, Anderson, and Lemmon. 

 A variety, S. xanti wallacei, was proposed for a plant 

 collected on Santa Catalina Island by Wallace. 



There are preserved in the Gray Herbarium of Harvard 

 University authentic specimens of all the above species, 

 those representing Eschscholtz's, and Dunal's types coming 

 from the Herbarium of Trinity College, Dublin. By an 

 examination of these it is possible to ascertain exactly what 

 were the plants intended by the different authors, and what 

 more recently collected material may be included with 

 them. 



A specimen collected by Hartweg is accompanied with a 

 note in Dr. Gray's hand, certifying it to be an original of 

 Eschscholtz's S. umhelliferum. It has a stem moderately 

 hirsute (but not canescent) with a mixture of unbranched 

 and few-branched hairs in about equal proportion. The 

 leaves are ovate, obtuse at base, about two centimeters 

 long, sparsely hirsute, the hairs short and mostly unbranched. 

 All the hairs are unilocular and not "landuliferous. 



