New or Noteworthy Species. 



XIIL 



MicRAMPELis LEPTOCAEPA. Habit of M. fahcicea, but more 

 slender, with smaller and more deeply lobed foliage: leaves 

 very thin, rather sparsely and delicately scabrous: flowers 

 white, apparently open-earapanulate rather than rotate; the 

 starainate about 8 to 12 in a simple raceme; pistillate ones 

 twice as large (| inch broad), with oblong jmckly ovary i 

 inch long or more: mature fruit father narrowly oblong, 

 acute, about 5 inches long, less than 2 inches thick, strongly 

 armed with flattened prickles ^ to 1 inch long: seed-cavities 

 2, each with perhaps 5 or 6 seeds, but these unknown. 



This very distinct Micrampelis inhabits the Colorado 

 Desert, in southern California, whence materials have beeu 



San Bernardino. 



Mr 



Xanthocephalum lucidum. Suffrutescent, the tufted stems 

 slender, 1 foot high, diffusely cymose-paniculate above: 

 linear-filiform foliage and very slender branchlets nearly or 

 quite glabrous, very glutinous and of a light green: heads 

 numerous, mostly glomerate at the ends of the twigs, clavate- 

 cylindrical, little more than a line long, flowers of disk and 

 ray mostly 1 each; bracts of involucre closely appressed: 

 pappus of 4 or 5 acute scales. 



In the region of the Mohave Desert, and southward. 

 Referred by Dr. Gray to the Texan GuUerrezia microcephala. 



Plagiobothrys CAMPESTRI8 may replace the name P. Cali- 

 formcus of page 231 preceding ; for a friend far away has 

 called my attention to the P. CaUformcus of Bull. Calif. 

 Acad. ii. 407. which T h»A f,>,.«^ff^>. 



