362 PROCEEDINGS OF THE AMERICAN ACADEMY 



have been referred to Senecio, to which I am unwilling this should be 

 added, notwithstanding the yellow hue of the flowers. 



Senecio Clarkiands : elatus, glaber ; radice perenni ; caule 

 stri(7to (3 - 4-pedali) simplici folioso apice corymboso-5 - 20-eephalo ; 

 foliis lanceolatis utrinque attenuatis laciniato-pinnatifidis dentatisve, 

 dentibus patentissimis argutis ; involucro bracteolis plurirais filiformi- 

 subulatis laxe calyculato, squamis linearibus acuminatis ; lisulis 10 - 15 ; 

 acheniis glabris. — In Clark's, meadow, below the Mariposa Big-tree 

 Grove, Bolander. This striking tall species may well bear the name 

 of the valued guide and mountaineer, Galen Clark, in whose meadow 

 it grows, and who has done so much to make the Mariposa Grove of 

 Sequoia gignntea accessible. Lower leaves tapering into a slender 

 petiole, with the blade 6-12 inches long. Heads rather large, 6 to 8 

 lines long ; the yellow ligules about half an inch in length. 



Senecio Mendocinensis : lana floeculosa decidiia glabrescens ; 

 radice perenni ; caule valido sesquipedali apice nudiuseulo coiymbuum 

 5 -S-cepIialura compactum gerente ; foliis succulentis denticulatis, radi- 

 calibus et inferioribus ovalibus oblongisve obtusis in petiolum angusta- 

 tis, sequentibus lanceolatis sessilibus, supremis in bracteas subulatas 

 diminutis ; involucro pluribracteolato, bracteolis setaceo-subulatis laxis 

 squamas proprias lanceolatas scarioso-marginatas acuminatas subae- 

 quantibus ; ligulis 12 - 15 oblongis brevibus ; ovariis glabris. — Open 

 plains at Noyo, Mendocino Co., May, Bolander. " Leaves thick and 

 succulent," according to Mi\ Bolander ; the lower 3 or 4 inches long 

 besides the petiole. The specimens resemble some forms of S. lugens 

 (including S. exaltatus, Nutt.) ; but the heads are considerably larger, 

 with more pointed scales of the involucre, and calyculate with numer- 

 ous very slender and conspicuous bractlets. 



Senecio Bolanderi : tomento tenui deciduo glabratus ; caule e 

 radice perenni assurgente subpedali folioso ; foliis omnibus pinnatisectis 

 petiolatis, foliolis 5-7 rotundatis vel subcuneatis inciso-3 - 5-lobatis 

 (lin. 4-8 longis) cum 2-6 inferioribus parvis sparsis sjepius integer- 

 rirais, imis quandoque stipuliformibus ; capitulis paucis subcorymbosis ; 

 involucro e calyculato, squamis 12 - 15 linearibus ; ligulis 4- 6 ; ovariis 

 glabris. — Sandstone Bluffs at the mouth of the river below Mendo- 

 cino City, May, Bolander. The foliage of this well-marked species 

 may be likened to that of a Poterium or of some Potentilla : the leaf- 

 lets are seldom at all confluent. Involucre about 4 lines long; the 

 yellow ligules 4 or 5 lines long. 



