CALIFORNIA. ACADEMY OF SCIENCES. 93 



CROCKERIA. Nov. Gen. Compositarum. 



Heads radiate, many-flowered, the flowers all fertile. 

 Receptacle conical. Involucre a single series of bracts con- 

 nate into an about 10-toothed cup. Disk-corollas 5-lobed. 

 Akenes oval-obovate, very flat, nerveless, glabrous; margins 

 with a distinct filiform nerve and very densely ciliate with 

 short somewhat clavate, more or less glandular hairs; apex 

 truncate. Pappus none. 



Genus dedicated to Charles Crocker, Esq., whose very 

 liberal patronage of California botany well merits this 

 recognition. 



C. chrysantha. 



Annual, a span or more high, nearly glabrous : leaves op- 

 posite, connate at base, linear, entire: heads i inch high; 

 involucre hemispherical, shorter than the disk; the ovate 

 bracts united to the middle : flowers golden-yellow. 



In alkaline soil about Lake Tulare ; collected by the writer 

 in the middle of April, 1884. The plant so exactly resem- 

 bles Lasthenia glabrata that nothing but a look at the akenes 

 will reveal the difference. Only a few specimens were made, 

 and these were taken on the supposition that they were of 

 the common plant just named. An account of the genus has, 

 at the date of the printing of this, already appeared in the 

 new volume of the Synoptical Flora of North America, 

 which contains the Composite, pages 72 and 445, wherein 

 the precise relationship of it is set forth. 



SENECIO. 



S. Austin*. 



Perenuial, lightly floccose; stem a foot or more high, naked 

 above; leaves somewhat fleshy, in outline oblong-oblanceo- 

 late, an inch or two long, tapering to slender petioles of 

 greater length, their margins closely laciniate-toothed-cleft 

 or -lobed, the lobes mostly simple and all mucronately tip- 

 ped ; heads not calyculate, a half inch high and nearly as 

 wide, 5 — 15 in an ample corymb; scales of the involucre 

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