OF ARTS AND SCIENCES : JUNE U, 1867. 357 



AVyethia ovata : tomentoso-pubescens ; caule valido tripedali 

 superne raraoso, ramis nionocephalis ; foliis ovatis acutissimis tripli- 

 nerviis subtus canescentibus, majoribus nunc subcordatis deltoideisve 

 omnibus petiolatis ; capitulis mediocris ; involucri squamis lanceolatis, 

 exterioribus laxis discum baud superantibus ; ligulis 10-14; pappo 

 calyci formiii-l-egulari exaristato. — Dry hillsides at Clark's, Mariposa 

 Co., Bolander. [Also collected by the late Thomas Bridges.] — Cauline 

 leaves 5-7 inches long, on petioles of 1 or 2 inches ; those of the 

 flowering branches 2 or 3 inches long and less truncate or rounded at 

 base ; the principal veins and ribs prominent underneath ; veinlets not 

 reticulated. Heads an inch in diameter. Rays often with imperfect 

 stamens. Achenia about 4 lines, the pappus nearly a line long. 



RUDBECKIA Californica : caule simplici inferne glabro apice 

 longe nudo pedunculiformi monocephalo ; foliis pube brevi molli in- 

 dutis ovato-lanceolatis penninerviis membranaceis parce ina;qualiter 

 serratis nunc inciso-dentatis, caulinis nunc lyrato-tripartitis, summis 

 semi-am plexicaulibus ; involucri squamis linearibus subuniseriatis ; 

 ligulis cuneato-oblongis sesquipollicaribus discum cylindraceum ad- 

 sequantibus vel superantibus ; fl. disci paleis acheniisque R. occiden- 

 talism Nutt. — Mariposa Big-tree Grove, Bolander. [Also in a collec- 

 tion of the late Thomas Bridges.] Stem 3 feet high, somewhat pubes- 

 cent at the summit. Leaves 3 to 6 inches long, all but the upper con- 

 tracted into margined petioles, occasionally obscurely triplinerved. 

 This may prove to be a radiate variety of R. occidentalis, in which 

 traces of pubescence are sometimes to be found. 



Rigiopappus leptocladus. Gray, described from Dr. Lyall's 

 collection (supra, 6, p. 548), was gathered by Mr. Bolander at New- 

 castle in California, in 1865, and on Russian River in 1866. 



BuRRiELiA LANOSA, Gray, in Bot. Whipp. (Pacif. R. R. 4), p. 51, 

 & Bot. Mex. Bound, p. 96. Near Fort Mohave, Dr. J. G. Cooper. 

 Better developed specimens than before collected, 2 to 4 inches high, 

 diffusely branching ; the leaves mostly narrowly spatulate, and the 

 cylindraceous heads peduncled. The rays prove to be white, and the 

 palete of the pappus vary from 8 to 12. All the upper leaves are al- 

 ternate. The involucre is that of a Bahia of the section Eriophyllum : 

 but the setiform appendages or cusps to the anthers (here remarkably 

 long) are as in Burrielia. They are similar, however, in Bahia rubella 

 and B. Wallacei, Gray, to which, especially to the former, the present 

 plant is very nearly related. 



