CAIvIFORNIAN ASTEJRACB^. 29 



Lessingia imbricata. Stout, rigid, simple, or with a few 

 rigid virgate branches, 6-10 in. high, soft-woolly; basal leaves 

 lanceolate, petiolate ; cauline short, ovate, acute, sessile and 

 cordate-clasping, erect, those of the upper part of stem" and of 

 the branches crowded and imbricate : heads sessile in the axils 

 of the upper leaves, and glomerate at summits of stems, nearly 

 cylindric, more than /^ in. high, their bracts arachnoid -woolly : 

 flowers not numerous, rose-purple, fading pinkish. 



Foothills west of I,os Gatos, A. A. Heller, 12 Sept. 1904 ; 

 the specimens distributed for L. hololeuca, from which this 

 plant differs widely by its virgate inflorescence, and long nar- 

 row heads. 



Lessingia arachnoidea. Very tall, simple to above the 

 middle, thence loosely cymose-panicled and rather few-flow- 

 ered; stem and branches glabrous, glandless ; cauline leaves 

 villous-flocculent on both faces, the reduced rameal ones 

 glabrous beneath : heads much above middle size, obovate and 

 many-flowered ; bracts of involucre numerous, evenly and 

 closely imbricated, pungently acute at tip, the margins densely 

 arachnoid-woolly: corollas purple : pappus very short, amount- 

 ing to little more than a setose crown at summit of achene. 



Beautiful and most distinct species, known only as collected 

 in the vicinity of Crystal Springs, San Mateo Co., by C. F. 

 Baker in 1902. 



Lessingia subspicata. Some two feet high or more, with 

 many virgate ascending branches from below the middle, the 

 slender ultimate branchlets alone floriferous above the middle, 

 and spicately, with also several heads sessile and glomerate at 

 the end of the twig : only rameal leaves known, these ovate- 

 oblong, acute, entire, glabrous and punctate beneath, white- 

 woolly above, the margins with few and small stalked glands ; 

 bracts of flowering twigs small and erect, the uppermost with 

 a head in the axil of each : involucres small, cylindric, 3-5- 

 flowered ; bracts many, erect, acutish, villous-flocculent : 

 achenes linear, villous ; pappus setose, rather short. 



