G26 PROCEEDINGS OF THE AMERICAN ACADEMY. 



acbaeniis brunneis graciliter cylindricis puberulis apice a cupula 

 albida pappifera coronatis ; pappi setis numerosis albis tenuis- 

 simis obscure barbellatis. — Tepic, Mexico, 5 January to 6 February, 



l 892, Dr. Edward Palmer, no. 2018 (type, in hb. Gray and hb. U. S. 

 Nat Mus.)- A species readily recognized by its slender at first sigbt 

 apparently naked stems and loose corymbose inflorescence. It is prob- 

 ably related to P. Seemannii Gray, which, however, has smaller heads 

 and narrower green and granular involucral scales, larger leaves, etc. 

 Perezia platyptera, n. sp., herbacea robusta 1.5 m. alta; caule glabro 

 striato basibus foliorum valde decurrentium conspicue lateque alato ; 

 alis cuneiformibus ad insertionem folii ca. 1 cm. latis herbaceis reticulato- 

 venosis deorsum gradatim decrescentibus saepissime denticulatis ; foliis 

 lanceolati-oblongis firmiusculis acute acuminatisca. 12cm. longis 3-4cm. 

 latis argute denticulatis utrinque reticulato-venosis ; inflorescentia 

 corymboso-paniculata, ramis folioso-bracteatis ; bracteis lanceolatis ca. 

 3 cm. longis subintegris conspicue decurrentibus ; capitulis ca. 15-floris 

 1.5 cm. longis ; involucri campanulati squamis multiseriatim imbricatis 

 linearibus attenuatis valde inaequalibus glanduloso-puberulis ; corolla 

 rosea ca. 1 cm. longa alte bilabiata ; achaeniis subteretibus fusco- 

 brunneis glandulosis ; pappi setis numerosis laete albis ca. 7 mm. longis. 



- In clayey soil, Sierra Madre Mountains, Michoacan or Guerrero, 

 Mexico, 22 January, 1899, alt. 1700 m., E. Langlasse, no. 773 (type, in 

 hb. Gray). A species readily distinguishable by its broadly winged 

 stems. 



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