28 PROCEEDINGS OP THE AMERICAN ACADEMT 



EurATORimi hyssopinum. Eximbricata, subglabrum ; caulibus 

 herbaceis (pedalibus) e basi suffruticosa usque ad cymam corymbifor- 

 mem aequaliter foliosissimis ; f'oliis oppositis parvulis (lin. G-lOlongis) 

 lanceolatis utrinque acutiusculis integerrimis uninerviis subsessilibus ; 



capitulis pluribus pedicellatis ; involucro biseriali e bracteis 14 oblongo- 

 linearibus villoso-ciliatis floribus 18-24 dimidio brevioribus ; pappo 

 corollam (lin. 3 longam) suboequante. — Mountains near San Luis. 

 No. 337. In habit the plant may be likened to Pycnanthemum lanceo- 

 latum. Lobes of the corolla rather long, lanceolate. 



EuPATOUlUM AMPLIFOLIUM. Eximbricata, E. Pazcuarensi et E. 

 grandidentato, D C. subsimile ; caule glabro orgyali ; foliis subglabris 

 oppositis et alternis ovatis acuminatis dentato-serratis longius petiolatis, 

 suramis (3-pollicaribus) basi subcuneatis, inferioribus (4— 6-pollicari- 

 bus) subcordatis ; capitulis paniculato-cymosis 12-floris; pedicellis 

 cinereo-pubescentibus ; involucro glabriusculo ; pappo deciduo corolla 

 alba angusta prorsus glabra breviore. — In forest, on high mountains 

 southeast of San Luis Potosi, Sept. No. 334. The heads are larger 

 and fewer-flowered than those of Mexican specimens from Schultz 

 named E. Pazcuarense, and from the very similar E. grandidentatum, 

 DC. ; also the corolla lacks the scattered long hairs which I find in 

 the above-mentioned species. 



Eupatorium Espinosarum. Eximbricata, viscosum, fere gla- 

 brum; caulibus fruticosis ramosis bipedalibus ; ramis foliosis cyma 

 subsimplici sessili corymbiformi terminatis ; f'oliis oppositis submem- 

 branaceis (cum petiolo sat longo 1-2-pollicaribus) lucidulis glutinosis 

 ovatis et ovato-lanceolatis serratis nunc inciso-dentatis triplinerviis ; 

 capitulis (lin. 3-4 longis) breviter pedicellatis confertis 1 2—1 7-tioris ; 

 involucro fructifero acheniis secus costas hirtellis parum longiore e 

 bracteis 9-10 lineari-oblongis obtusis subcrassis 1-3-nervatis; corolla 

 alba angusta, lobis brevibus ovatis pappum paullo superantibus. — In 

 oak-thickets on the sides of a mountain near San Luis. No. 333. A 

 well-marked species of the group to which E. Berlandieri belongs ; 

 the white-flowered heads abundant and handsome. Dedicated to the 

 brothers Don Antonio and Don Manuel Espinosa y Cervantes, who 

 hospitably promoted the formation of this collection. Don Antonio, 

 a civil engineer, was the Secretary of the United States and Mexican 

 Boundary Commission. 



E. Espinosarum, var. ambiguum. Parum glutinosum ; caulibus 

 floridis strictis fere herbaceis apice paniculato-cymosis; foliis baud 

 lucidis. No. 344. Apparently not distinct from the preceding 

 6pecies. 



