256 ROBINSON. 



late ovatis obtusis serratis (basi le\'iter cordata integra) 2-2.8 cm. 

 longis 1.5-2 cm. latls coriaceis basin versus penniveniis supra basin 

 3-nervatis utrinque reticulatis supra dense cum glandulis sessilibus 

 praeditis aliter glabris subtus fuh'o-pubescentibus et sparsius glanduli- 

 feris; petiolo 1-3 mm. longo fulvo-tomentello; corymbis numerosis 

 parvis in ramis terminalibus; ramulis pedicellisque griseo-hirsutis ; 

 capitulis ca. 10-floris ca. 6 mm. altis; involucri campanulati squamis 

 7-10 subaequalibus vix imbricatis lanceolato-oblongis acutiusculis 

 dorso fulvo- vel griseo-tomentosis ; receptaculo parvo piano calvo 

 glabro; corollis (valde immaturis) verisimiliter albidis 5 mm. longis 

 glabris; tubo proprio ca. 1 mm. longo; faucibus distincte amplratis 

 sul)cylindricis ca. 3 mm. longis; acliaeniis deorsum attenuatis in 

 angulis cum glandulis sessilibus vel brevissime stipitatis praeditis. — 

 Colombia: Guadalupe, Dept. Cundinamarca, alt. 2900 m., Bros. 

 ApoUinaire & Arthur, no. 27 (type Gr.). 



EuPATORiuM RoTHROCKii Gray. This species seems to be capable 

 of subdivision into the following varieties. 



Var. typicum, foliis firmiuscule membranaceis ovatis vel lanceolatis 

 basi obtusis vel rotundatis serratis (dentibus acutis) laeti- vel flaves- 

 centi-viridibus.— £. Rothrockii Gray, Syn. Fl. i. pt. 2, 102 (188-1). 

 Kyrstenia Rothrockii (Gray) Greene, Leafl. i. 9 (1903). — Arizona: 

 Mt. Graham, alt. 2745 m., September, 1874, Dr. J. T. Rothrock, nos. 

 740, 741; Pine Canon, alt. 2440 m., 1 Oct., 1909, Blumcr, no. 3434. 

 Chihuahua: southwestern part of state, Aug.-Nov. 1885, Palmer, 

 no. 375; shaded ledges of the Sierra Madre, 8 Oct. 1887, Prinr/Ic, no. 

 1265 (mixed with E. Lemmoni Robinson); mountain near Pilares, 

 Strawberry Valle}^, 22 Sept. 1891, Hartman, no. 752; near. Colonia 

 Garcia, alt. 2250 m., 12 Sept. 1899, Townsend ((• Barber, no. 325. 



Var. Shrevei, var. nov., foliis tenuioribus deltoideo-ovatis cordatis 

 vel basi truncatis majoribus usque ad 1 dm. longis et 7 cm. latis grosse 

 crenatis fuscescente viridibus; inflorescentia, involucris, flosculi.s ut 

 apud var. typicum. — Arizona : Ramsey Canon, Huachuca ISIoun- 

 tains, alt. 1680 m., 25 Sept. 1916, Dr. Forrest Shrcve, no. 5017 (type 

 Gr.). Seemingly something more than a mere shade form, although 

 without any as yet detected floral differences. 



E. (§ Subimbricata) sciaphilum, spec, nov., fruticosum vagum 

 2-4 m. longum niolliter lignosum; ramis teretibus glabris purpur- 

 ascenti-griseis ramulis fulvescenti-puberulis, pilis crispis; foliis 

 oppositis spatulato-obovatis -vel -oblanceolatis integerrimis utrinciue 

 glabris molliter coriaceis sessilibus vel brevissime petiolatis obtusis 

 basi cuneatis 5-8 cm. longis 1.8-3.2 cm. latis, ner\o medio supra 



