ROBINSON. — NEW SPERMATOPHYTES, CHIEFLY FROM MEXICO. 37 



DeCandolle does not appear to have seen the plant of Humboldt and 

 Bonpland, and the distinctions on -which he attempted to separate 

 E. triangulatum were deduced from the description of Kunth, but on 

 comparison of the plants themselves these distinctions do not appear 

 to be definite or important. The species should certainly be united and 

 stand under the older name E. rubricaule HBK. 



Brickellia ^betonicaefolia Gray, PL Wright, ii. 72 (1853). In the 

 typical form of this rather variable species the leaves are ovate-oblong 

 and flat, the larger 6 cm. long, 3 cm. wide ; petioles very short, scarcely 

 over 2 mm. long ; longer scales of the involucre rather attenuate. 



Var. humilis Gray, 1. c. Leaves ovate-oblong, flat, essentially sessile, 

 the largest 3.8 cm. long, 1.5 cm. wide; longer scales of the involucre 

 linear, attenuate. 



Var. elliptica Robinson, n. var., foliis late ellipticis planis 3-4 cm. 

 longis 1.8-3 cm. latis subsessilibus ; squamis involucri atropurpureis 

 interioribus lanceolati-linearibus attenuates. — Barranca below Sandia 

 Station, Durango, Mexico, alt. 213.") m., 13 October, 1905, C. G. Pringie, 

 no. 10,102 (type, in hb. Gray). 



v Var. conduplicata Robinson, n. var., caule 6-9 dm. alto ; foliis 2-3 

 cm. longis 1.4-1.8 cm. latis saepissime conduplicatis ; petiolo gracile 

 4-5 mm. longo ; squamis involucri interioribus oblongi-linearibus atro- 

 purpureis vix attenuatis. — San Luis Potosi, Mexico, on rocky hills, 

 San Jose" Pass, 16 August, 1890, C. G. Pringie, no. 3171 ( distributed as 

 B.betonicaefolia Gray?). Mountains near General Cepeda, Coahuila, 

 Mexico, alt, 1920 m., 7 October, 1905, C. G. Pringie, no. 10,081 (type, 

 in hb. Gray). 



y Brickellia saltillensis Robinson, n. sp., caulibus teretibus 9-1 2 dm. 

 altis gracilibus striatulis pallide viridibus vel leviter purpurascentibus 

 molliter breviterque pubescentibus foliosis ; foliis alternis petiolatis in 

 axillis proliferis, laminis late ovatis obtusis vel subacutis serratis tenui- 

 bus utrinque viridibus brevissime pubescentibus basi rotundatis 4-5.5 

 cm. longis 2-4 cm. latis a basi 3-nerviis laxe reticulato-venosis ; petiolo 

 1-1.4 cm. longo pilis crispis glanduloso-puberulo ; foliis parvis ellipticis 

 2-4 in axillis ; panicula angusta 7-30 cm. longa 4-7 cm. diametro fol- 

 ioso-bracteata ; cymulis saepissime 3-capitulatis ; pedicellis gracillimis 

 filiformibus glanduloso-puberulis nutantibus ; capitulis ca. 14-floris 1.8 

 cm. longis ; involucri subturbinati squamis exterioribus viridibus striatis 

 lanceolatis attenuatis dorso puberulis, interioribus lanceolati-linearibus 

 attenuatis purpureo-tinctis 1-1.2 cm. longis ; corollis albidis angustis- 

 sime tubulosis 8-9 mm. longis glabris, faucibus nullis, limbi dentibus 

 brevissimis erectis ; styli ramis nigrescentibus vix clavatis longe ex- 

 sertis ; achaeniis columnaribus 4.5 mm. longis adpresse pubescentibus 



