OP ARTS AND SCIENCES. 19 



Pekittle makes the closest approach to the foregoing genus in 

 P. dissecta {Laphamia dissecta, Torr. in PI. Wright, ii. 81), the akene 

 of which is hardly ciliate, and the ci-own of the pajTpus is i-educed to a 

 mere border, the single awn sometimes wanting. The style-branches 

 are slender and subulate, not "short and obtuse," as was stated in Proc. 

 Am. Acad. ix. 195. Among the genuine species, P. Fitchii^ Torr. in 

 Pacif. R. Rep. iv. 100, founded on imperfect materials, probably from 

 the islands off California, appears to include (as var. Palmeri) the 

 jilant collected by Palmer on Guadalupe Island, no. 44, and distributed 

 as P. Emoryi. It has thin-edged akenes, nearly hirsute-ciliate, and 

 somewhat falcately oblique ; the jjappus sometimes obsolete, sometimes 

 of numerous squamella? united into an erose crown, and no awn. 

 Otherwise it is hai'dly distinguishable from P. Californica, Benth. (of 

 the section having callous-margined akenes densely long-ciliate), which 

 proves to be the P. Emoryi^ Toi-r., including var. nuda, the P. nuda, 

 Torr. P. plamigera is still known only from Coulter's specimens. P. 

 micro glossa, Benth., which had been overlooked, is the P. Ccdifomica 

 of Gray, Proc. Am. Acad., &c. (but not of Benth.), and P. Acmella, 

 Gray, PI. Fendl. 77, &c. There is a marked var. ejfasa, very much 

 branched and pauiculately floriferous, with unusually small heads and 

 akenes, from Arizona, Prinylc. P. leptoffhssa, P. Parryi, and P. 

 aglossa remain as rare but seemingly good species, all with setaceous- 

 filiform style-tips. 



EATONELLA, Gen. Nov. Subtrib. PerUylearum. 



Capitulum circiter 20-florum, heterogamum, floribus radii fcemineis, 

 ligulis parvulis, vel radio deficiente homogamum. Receptaculum planum 

 nudum. Involucrum e bracteis planis 5-8 ovalibus oblongisve eequali- 

 bus. Corolla; disci breviusculaj, superne dilatata 4-5-dentatJe. Styli 

 rami fl. disci breves truncato-obtusi. Achenia compressa (extima 

 nunc obcompresso-triangulata), calloso-marginata, crebre ac longissime 

 villoso-ciliata. Pappus e paleis paucis sa^pius 2 latissimis enerviis. — 

 Herbse annua? vel biennes, Californicas, lanosce, alternifoliEe, capitulis 

 parvulis subsessilibus. Sjiecies 2. 



Eatonella nivea. Pygma^a, vix caulescens, laxe lanosissima ; 

 capitulis inter folia rosulato-conferta spathulata integerrima sessilibus ; 

 involucri bracteis 8 angusto-oblongis ; ligulis totidem parum exsertis ; 

 corollis disci 5-dentatis; acheniis lineari-obloncis atro-nitidis coma 

 niveo-alba ciliatis ; pappi paleis 2 opacis latissimis subtruucatis parce 

 eroso-dentatis e centre in aristam longiorem subulatam productis. — 

 Burrielia iiivea, D. C. Eaton in Bot. King Exp. 174, t. 18. Acti- 



