548 HITCHCOCK: Mexican grass 



based upon a specimen (No. 387) collected at San Agustin 

 (Oaxaca) by Liebmann, a Danish botanist, who made extensive 

 collections in Mexico (Vera Cruz and Oaxaca). The type speci- 

 men of this species was kindly sent for examination by the 

 Director of the Botanical Museum at Copenhagen. It proves 

 to be the same as Ixophorus unisetus. The specimen bears, in 

 Fournier's handwriting, the name Panicum cirrhosum Fourn. n. 

 sp., a name which, in pubUcation, he changed to Setaria cirrhosa. 



The species just mentioned is the fifth species of Setaria in 

 Fournier's account. His sixth is Setaria uniseta, based upon 

 Urochloa uniseta Presl. As number seven he hsts without de- 

 scription Setaria schiedeana, based on Ixophorus schiedeanus 

 Schlecht., stating that he has not seen this and that Schlechten- 

 dahl does not describe it, thus inflicting on the botanist another 

 nomen nudum. 



Thus the species remained until 1893, when several manu- 

 script descriptions of Dr. George Vasey were pubHshed after 

 his death. Under the name Panicum (Ptychophyllum) palmeri 

 Vasey is published a new species based on a specimen collected by 

 Dr. K. Palmer at Tequila, JaUsco, in 1886. Vasey remarked 

 that this is near Setaria cirrhosa Fourn. Vasey referred this 

 to the section Ptychophyllum of Panicum because of the single 

 bristle below the spikelets, because of the inflorescence, which 

 resembles that of P. sulcatum, and perhaps because of the rather 

 broad blades. 



In 1895 Dr. J. N. Rose published an account of the plants col- 

 lected in Mexico by Dr. E. Palmer in 1890 and 1891. Among 

 the grasses is a new species credited to Dr. Vasey, Panicum 

 {Ptychophyllum) pringlei. The specimens mentioned are Pr ingle 

 2047 and 2423, and Palmer 1256 in 1891. All are small forms 

 of Ixophorus unisetus. Because of the specific name and be- 

 cause Dr. Vasey has written the name upon Pringle 2423, this 

 specimen is the type. 



In 1896 Beal published the same species as new under the name 

 Panicum schiedeanum "Trin. ex. Steud. Nom. Ed. 2, 2: 263 

 (1841). P. Pringlei Vasey in ed.," basing it on Pringle's No. 

 2423 from Jahsco, which is the type of Panicum pringlei. Beal 



