CALIFORNIA ACADEMY OF SCIENCES. 193 



of characters of the fruit in the entire group to which they 

 belong. But specific rank for the plant above named might 

 have been defended independently of Crock&ria. Although 

 there is not the least difference between them as regards 

 habit, foliage or flower, the akenes in L. glabrata and L. 

 Coulteri are considerably more unlike than is indicated in 

 the Synoptical Flora. In L. glabrata they are dark green, 

 perfectly smooth and shining, and bear a very conspicuous, 

 yellowish, globular tubercle (enlarged style-base?) at the 

 apes. Those of L. Coulteri, besides being narrower, with 

 less acute angles, are of a grayish hue, without luster, glan- 

 dular-muriculate throughout, with a depressed terminal disk 

 which cannot well be called a tuberculation. The plant thus 

 proposed as a new species, appears to be confined to the 

 salt marshes of San Diego County. L. glabrata, Lindl., is 

 common everywhere, on a great variety of soils, towards the 

 sea, in the central and northern portions of the State. Crock- 

 eria chrysantha, Greene, was found in a subsaline marsh of 

 the remote interior, near Tulare, in Kern County. It may 

 be found elsewhere when our collectors have learned never 

 to judge any plants of this little group by the outward ap- 

 pearance, but always to bring a good lens to bear upon the 

 akene before passing them by uncollected. A skilled bota- 

 nist would easily mistake any one of the three here named 

 for one of the others, without such precaution. 



Senecio ammophilus. 



Annual; a span high, stout, glabrous: leaves thick and 

 succulent, the lowest oblanceolate, entire, an inch or two 

 long; cauline auriculate-clasping, pinnately parted into ob- 

 long or linear, entire, obtuse segments : heads few or soli- 

 tary at the ends of the numerous decumbent branches: rays 

 rather short, deep yellow : akenes cinerous-pubescent. 



Cape San Quentin, Lower California, on bleak sand hills 

 near the shore, growing with Abronia maritima. Very near 

 S. Californicus, but differing in its depressed habit, very 



