386 PROCEEDINGS OF THE AMERICAN ACADEMY 



longis (lin. 4 loiigis) laete aureis ; styli ramis brevibus ajipendice ovato- 

 lanceolata parte stigmatosa a^quilongia; acheniis turbinatis villosissi- 

 mis; pappo rigido valde inasquali, setis validioribus aristisve corolla 

 disci brevioribus achenio duple tautum longioribus. — Mountainous 

 country about 150 miles north of Batopilas, Palmer, 408. 



AcH^ETOGERON Pal3IEKI. Glabellus, pube minuta strigulosa tan- 

 tum puberulus ; caulibus strictis bipedalibus e radice (ut in affinibus) 

 perenni subiequaliter foliosis oligocephalis ; foliis linearibus imisve sub- 

 spathulatis integerrimis ; involucro multibracteato striguloso-puberulis ; 

 ligulis perplurimis angustis albis (in tubulo pi. m. styliferis sed sterili- 

 bus ?) ; styli ramis fl. herm. appendice brevi ovata obtusa superatis ; 

 ovariis obovatis compressis ad margines nervatis ; pappo brevissimo 

 setuloso-coroniformi. — Shady woods on the summit of the mountains 

 above Batopilas, at about 8,800 feet. Palmer, 3G2.* 



AcH^TOTERON AFFiNis. Pryecedenti proximus, pilis patentibus 

 (l^arte iuferiore prsesertim) hirsuto-pubescens ; foliis membranaceis, 

 inferioribus angusto-spathulatis acutatis rariter argute deutatis, sum- 

 mis linearibus integerrimis ; capitulis dimidio minoribus ; ligulis minus 

 numerosis (40-50) albis ut videtur omnino neutris ; styli ramis fl. 

 herm. deltoideis acutissimis ; acheniis parce puberulis subcompressis 

 margine utroque tautum leviter uninervio ; pappo brevissimo setuloso- 

 coroniformi. — At the Frailes, about mid-height of the mountains 

 above Batopilas, in shade under trees. Palmer, 255. The genus 

 AchcBtogeron is asserting itself as a necessity. The neutral rays of 

 this species seem to be approximated by the preceding. 



AcHA^TOGERON piNNATiFiDUS. Multicaulis 6 radice perenni, 

 ultra-pedalis, pilis patentissimis undique hirsutus ; foliis pinnatipar- 

 titis, segmentis linearibus rhachi tequilatis nunc latioribus sa^pius 

 integerrimis ; involucro cinereo-hirsuto ; ligulis perplurimis angus- 

 tissime linearibus albis ; acheniis compressis ovali-oblongis glabellis 

 marginato-binervatis ; pappo conspicuo coroniformi pluri-laciniato ter- 

 tiae parti longitudinis achenii adaiquante. — On cool mountains west 

 of Chihuahua, October, Pringle, 103. This is a true congener of 

 AchcEtogeron Wislizeni, Gray, which came fi'om the same district in the 

 mounttiins farther west, and has entire leaves. But it is so very like 

 Erigeron {Phalacroloma) Neo-Mexicanus, Gray, in aspect, although 

 specifically different, as to suggest the union of these four species of 



* Psiladis asteroides, Gray, PI. Fendl., was collected by Palmer (410) north of 

 Batopilas, therefore not very far from the station wliere Wislizenus found it. 

 but in a more glandular and viscous form. P. brevilingulala, Schultz Bip., 

 comes in Pringle's collection (14). 



