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 Clarkianus : elatus, glaber ; radice perenni ; caule 

 stricto (3 - 4-pedali) sirnplici folioso apice corymboso-5 - 20-cephalo ; 

 foliis lanceolatis utrinque attenuatis laciniato-pinnatifidis dentatisve, 

 dentibus paten tissi mis argutis ; involucro bracteolis pluriniis filiformi- 

 subulatis laxe calyculato, squamis linearibus acuminatis ; ligulis 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 gigantea 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 flocculosa decidua glabrescens ; 

 radice perenni ; 'caule valido sesquipedali apice nudiusculo corymbuum 

 5 - 8-cephalum compactum gerente ; foliis succulentis denticulatis, radi- 

 calibus et inferioribus ovalibus oblongisve obtusis in petiolum angusta- 

 tis, sequentibus lanceolatis sessilibus, supremis in bracteas subuiatas 

 diminutis ; involucro pluribracteolato, bracteolis setaceo-subulatis laxis 

 squamas proprias lanceolatas scarioso-marginatas acuminatas subas- 

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

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

 succulent," according to Mr. Bolander; the lower 3 or 4 inches long 

 besides the petiole. The specimens resemble some forms of S. luge us 

 (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 Boeanderi: tomento tenui deciduo glabratus ; caule e 

 radice perenni assurgente subpedali folioso ; foliis omnibus pinnatisectis 

 petiolatis, /oliolis 5-7 rotundatis vel subcuneatis inciso-3 - 5-lobatis 

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

 rimis, 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. 



