ROBINSON. — NEW SPERMATOPHYTES, CHIEFLY FROM MEXICO. 29 



pubescentibus margine saepe purpurascenti-hispidulis apice obtusis basi 

 attenuates ; corynibis 3-4 cm. diametro convexis 10-20-capitulatis ; ca- 

 pitulis 1.5 cm. longis breviter pedicellatis vel etiam sessilibus, bracteis 

 linearibus 3-6 mm. longis herbaceis ; squarnis involucri ca. 6 linearibus 

 acutis purpureis 7 mm. longis pilis crispis atomisque resinosis tectis ; 

 flosculis 5 ; corollis 8 mm. longis, tubo purpureo pubescenti gradatim a 

 basi sursum leviter ampliato, limbo albo patenti 5-lobo, lobis oblongis 

 obtusiusculis ; achaeniis gracilibus 5 mm. longis sursum praesertim in 

 angulis hispidulis ; pappo e squamulis 5 albidis brevissimis et aristis 5 

 purpureis divergentibus scabratis composite — Sandia Station in moun- 

 tains of northwest Durango, Mexico, alt. 2290 m., 12 October, 1905, 

 C. G. Pringle, no. 10,092 (type, in hb. Gray). A species evidently re- 

 lated to 8. laxiflora DC. and 8. serrata DC, but readily distinguished 

 by its numerous separate dense corymbs and entire leaves. Named for 

 Sr. Filemon L. Lozano, faithful and efficient companion and assistant 

 of Mr. Pringle in his recent journeys to Mexico. 

 ^/ Stevia Plummerae Gray, var. durangensis Robinson, n. var., foliis 

 tenuibus lanceolato-oblongis 6-9 cm. longis 1.5-2 cm. latis supra mediani 

 partem serratis nee dentatis supra pilis brevissimis crispis griseo-puber- 

 ulis subtus molliter pubescentibus ; corollis albis. — Barranca below 

 Sandia Station, Durango, Mexico, alt. 2135 in., 13 October, 1905, C. G. 

 Pringle, no. 10,106 (type, in hb. Gray). Nearer var. alba Gray, Syn. 

 Fl. i. pt. 2, 92, than to the typical form, but differing in its thinner 

 larger less strongly reticulated and much more pubescent leaves. 



Eupatorium acutidentatum Robinson, n. sp., herbaceum erectum 

 6 dm. altum ; caule gracili tereti striato viridi vel purpurascenti crispe 

 puberulo subsimplici vel modice oppositirameo ; foliis oppositis ovato- 

 lanceolatis tenuibus argute serrato-dentatis basi cuneata et apice at- 

 tenuate integris a basi 3-5-nerviis 3.6-5 cm. longis -1.8-2.2 cm. latis 

 supra laete viridibus scabriusculis subtus vix pallidioribus in nerviis 

 sparse pubescentibus, petiolo puberulo ca. 5 mm. longo ; capitulis ca. 

 12-floris 1 cm. longis numerosis graciliter pedicellatis in corymbos valde 

 convexos collectis, pedicellis 5-8 mm. longis griseo-puberulis ; invo- 

 lucri squamis anguste oblongis vel lanceolatis attenuatis herbaceis 

 griseo-puberulis inaequalibus laxe imbricatis interioribus quam flosculis 

 dimidio brevioribus ; corollis albis glabris, tubo proprio gracili quam 

 faucibus gradatim sed valde ampliatis distincte breviore ; achaeniis 

 nigrescentibus 3 mm. longis prismaticis deorsum paululo angustatis 

 sursum hispidulis ; pappi setis minute barbellatis corolla fere aequi- 

 longis basin versus roseis. — Barranca below Sandia Station, Durango, 

 Mexico, alt. 2135 m., 15 October, 1905, C. G. Pringle, no. 10,095 (type, 

 in hb. Gray). This species is obviously close to E. betulaefolium 



