ROBIXSON. — NEW SPERMATOPHYTES, CHIEFLY FROM MEXICO. 35 



subtus albidis prominulis, venis lateralibus utrinque ca. 5 inaequidis- 

 tantibus maximis supra basin orientibus ; petiolis 5-8 mm. longis levi- 

 ter marginatis basi linea transversa connexis ; inflorescentiis corymbosis 

 valde convexis oppositirameis multicapitulatis ; bracteis inferioribus 

 petiolatis ovatis foliis similibus sed multo minoribus superioribus 

 anguste linearibus sessilibus ; pedicellis rectis filiformibus patenti- 

 ascendentibus pilis crispis obtectis ; capitulis parvis numerosissimis 

 saepissime 5-floris S mm. longis ; squamis involucri ca. 8 linearibus 

 vix imbricatis sordide puberulis acuiiusculis interioribus 4-5 mm. 

 longis extimis 1-3 multo brevioribus ; coroUis glabriusculis 4.6 mm. 

 longis albidis vel roseis, tubo proprio gracili quam faucibus subcylindratis 

 breviore, dentibus limbi ovato-deltoideis ; achaeniis nigris prismaticis 

 griseo-puberulis 3 mm. longis ; pappi setis praesertim basi pulcberrime 

 roseis corollam vix aequantibus. — Mountains near Saltillo, Coabuila, 

 Mexico, alt. 2135 m., 5 October, 1905, C. G. Princjle, no. 10,080 (type, 

 in bb. Gray). Tbis species is obviously related to E. mkranthum Less. 

 It differs, however, in many small characters. The leaves are thin and 

 translucent while in E. micranthum they are thickish and quite opaque. 

 In E. salt'dlense they are also much broader relatively to their length 

 and not attenuate. The nervation is furthermore quite different, for 

 in E. micranthum the lateral veins leave the midnerve in a pretty reg- 

 ular pinnate fashion, while in E. saltUlense they are less numerous and 

 less regular and give the leaves somewhat the appearance of being 3- 

 nerved from a point above the base. 



Eupatorium sexangulare (Klatt) Robinson, n. comb. Piptocaiyha 

 se.rangularis Klatt, Botanisches Beiblatt zur Leopoldina, 1895, p. 1. 

 Mr. H. A. Gleason, during a recent examination of the Yernonieae in 

 the Gray Herbarium, called my attention to the type of Dr. Klatt's 

 Piptocarpha sexangularis, which appeared wholly irreconcilable with 

 the genus in which it had been placed and indeed with any other genus 

 of the Vernonieae. Unfortunately the specimen, although showing well 

 the stem, leaves, inflorescence, involucral scales, etc., has but very few 

 flowers, and these have been so damaged by decay or insects that it is 

 impossible to state precisely the form of the anthers or style-tips ; nev- 

 ertheless there can be no doubt that the plant is a Eupatorium, and as 

 it appears to be unlike any species previously referred to that genus, it 

 may be simply transferred thither. In its sharply angled stem and 

 large thickish lanceolate leaves it bears considerable resemblance to the 

 plant here described as E. hospitale. It may be readily distinguished, 

 however, by the different venation of the leaves, entirely glabrous 

 achenes, etc. 



Eupatorium sphenopodum Robinson, n. sp., herbaceum oppositi- 



