OP ARTS AND SCIENCES. 387 



Ach(stogeron with the Phalacroloma or Polyactidlum section of Eri- 

 geron. Yet it would be very inconveuient to include in the latter 

 genus species which have no pajapus-bristles. On the other hand, the 

 ambiguous A. Seemanni seems to have rudimentary bristles. 



Erigerox (C<enotus) INOPTATUS. Hirsutus : caule valido ultra- 

 bipedali e basi ignota fastigiato- seu corymboso-ramosissimo ; foliis 

 laciniato-pinnatifidis vel parce inciso-dentatis, ramealibus strpius iute- 

 gerrimis angusto-lanceolatis ; capitulis subcymosis pedunculatis ; invo- 

 lucri bracteis 2-3-seriatis suba^quilongis lineari-lanceolatis acuminatis 

 appressis, intimis scariosis ; disco permultifloro cum receptaculo valde 

 convexo ; floribus foemineis uniseriatis, ligula oblongavel lineari stylum 

 suum parum et flores hermaphroditos baud superante ; achenis glabris ; 

 pappo e setis panels corolla brevioribus albis barbellulatis caducis. — 

 On river-bank in sand, 150 miles north of Batopilas, Palmer, 442. A 

 coarse plant, of anomalous habit and character. Heads a quarter of 

 an inch in diameter. 



Gnaphalium Pringlei. Annuum vel bienne, sesquipedale ; foliis 

 radicalibus spathulatis, caulinis lanceolatis acutiusculis (suramis vix 

 apiculatis) basi breviter adnato-decurrentibus subtus tenui-lanatis supra 

 cum caule ramisque pube brevissima viscidula indutis ; capitulis par- 

 vulis (lin. 2 longis) glomerato-cymosis ; involucro cyliudraceo, bracteis 

 albidis obtusiusculis, extimis angusto-oblongis, intimis liuearibus. — 

 Near Chihuahua, under cliffs, Oct., Pringle, 305. 



Lagascea decipiens, Hemsl. Biol. Centr.-Am. Bot. ii. 140, t. 44. 

 San Miguel, near Batopilas, on the mountain-sides, Palmer, 145. 

 " Compatrt shrubby plants, with abundance of golden-yellow blooms." 

 The deep yellow color of the corollas is well preserved in the excel- 

 lent dried specimens. The flowers of Seemann's plant were probably 

 of the same color, but the specimens do not show it. In both, the up- 

 per part of the akene, as well as the pappus, is more or less villous. 



Guardiola Tulocarpus, Gray, var. arguta. Elatior e caudice 

 perenni ; foliis plerisque lanceolatis infcqualiter argute dentatis, quan- 

 doque modo G. atrijplicifoUce dente infirao utrinque protracto sub- 

 hastatis ; involucro lin. 4-5 longo, fructifero ovoideo-fusiformi ; floribus 

 fceniineis acheniisque nunc 2. — Rocky hills west of the city of Chi- 

 huahua, " growing in large clumps," Pringle, 678. The root is evi- 

 dently pereimial ; but the foliage is too like that of G. otriplicifolia. 

 — The North American G. platgphgUa, Gray, was brought by Palmer 

 (35) from the mountains south of Batopilas. 



Melampodium longicoknu. Gray. The enclosing fructiferous 

 bracts become strongly tuberculate in Pringle's Chihuahua specimens, 



