206 PROCEEDINGS OF THE AMERICAN ACADEMY 



still herbaceous, but want the base, which is probably lignescent ; are 

 widely and freely branching ; and the leaves, even the largest (about 

 an inch and a half long), have a petiole of two lines at most, com- 

 monly shorter. The akenes are well flattened, sharp-edged, one face 

 sliglitly convex and the other concave, the latter with a midnerve, the 

 pericarp very thin. The heads in this, as also in B. setosa, are all erect. 

 But iu the herbarium of M. Boissier is a specimen from herb. Pavon, 

 which, so long as there is no evidence that the forms run together, must 

 be taken as a third species of the genus, and the original character 

 will have to be modified a little in respect to the nervation of the 

 akenes : — 



Barkoetea Pavonii. Herbacea ; foliis ovatis membranaceis basi 

 lata truncata vel subcordata arete sessilibus argute dentatis, dentibua 

 setigeris ; capitulis laxe paniculatis in pedunculo gracili nutantibus ; 

 involucri (lin. 4 longi) bracteis fere scariosis lanceolatis mucronato- 

 acutatis ; acheniis latiusculis plano-compressis, uno latere 3- altero 

 1-3-nervato. — Mexico, herb. Pavon, nunc Boissier, sub nom. " Eupa- 

 torium setiferura" and " E. cuspidatum." Char, from notes taken in 

 herb. Bossier and two capitula. In form the involucral bracts resemble 

 those of B. setosa. 



Brickellia odoxtophtlla. Sat elata, puberula; caulibus vel 

 ramis simplicibus; foliis alternis membranaceis petiolatis grosse crenato- 

 dentatis cordatis vel subcordatis, sinu lato aut truncato aut medio 

 breviter cuneato-decurrente, venis baud reticulatis ; capitulis racemosis 

 secundis pendulis iis B. secundiJlo7-ce (forma B. CavaniUesii) simili- 

 bus; involucri glabri bracteis omnibus acutis. — Coahuila, Mexico, in the 

 Sierra Madre south of Saltillo, Palmer, no. 442. Leaves with lamina 

 an inch or two long, thin ; lower obtuse and almost as wide as long, 

 some of them with more tapering apex. 



Brickellia Pringlei. Inter B. cylindraceam et B. thyrsijloram ; 

 caulibus herbaceisstrictisbipedalibus puberulis superne hirsutulis ; foliis 

 brevi-petiolatis oblongo-lanceolatis acutis basi obtusis subserratis fere 

 coriaceis trinervatis eximie reticulatis scabro-puberulis ; thyrso e ramis 

 floridis brevibus oligocephalis laxo folioso ; capitulis vix pedunculatis 

 plusquam 20-floris ; involucro pluriseriatim imbricato, bracteis gla- 

 bris, intimis lanceolatis acutis, exterioribus ovatis rotundisque parum 

 mucronatis in bracteolas pedicellum imbricantes transeuntibus. — S. 

 Arizona, in canons of the Santa Cataliiia Mountains, April, 1881. 



Brickellia Lemmoni. Foliis priori capitulis et infiorescentia B. 

 betoniccefolia sat aflEinis, cinerco-puberulis ; caulibus gracilibus ultrape- 



