Chase — Notes on Genera of Panicetz. IV. Ill 



glabrous, the hairs of the lateral internerves and margins and of the 

 second glume being also much longer than in V. Hitchcockii ; the fruit 

 of the latter is much smaller, less acuminate and the lemma more broadly 

 margined than in V. saccharata. 



This species is known only from Texas. It was also collected by 

 G. C. Nealley, at Sanderson, Pecos County, in September, 1892, and at 

 Del Rio, October, 1892, both collections being distributed as no. 109. 



Until the South American species referable to Valota are better known 

 the transfer of Nees' species of Trichachne to this genus is deferred. 



4. Genus SYNTHERISMA Walt. 



~%*fJi*~ HM/r 



Sanguinella Gleichen, Mikrosk. Untersuch. 4. pi. 8. 1764. This 

 includes a single species with a phrase name which is not directly asso- 

 ciate with a previously published binomial, hence the genus is not 

 technically published. The plate is a crude colored representation of 

 Syntherisma sanguinalis. 



Digitaria Haller, Stirp. Helv. 2:244. 1768, not iVdanson, 1763. Haller 

 includes two species, the first of which is Linnaeus' Panicum sanguinale , 

 this name, however, being omitted and Linnaeus' diagnosis used instead 

 as a phrase name. 



Syntherisma Walt. Fl. Carol. 76. 1788. Three species are included, 

 the first of which, S. praecox Walt., is taken as the type. Though there 

 is no specimen of this now in Walter's herbarium,* there is little doubt 

 that it the same as Panicum sanguinale L. as stated by Michaux f and by 

 Elliott. X 



Gramerium Desv. Opusc. 61. pi. 7. f. 1. 1831. This includes a single 

 species, G. convolutum Desv. We have not seen Desvaux's specimen 

 but the description and figure apply well to the South American allies of 

 Syntherisma adusta (Nees) Chase, and may possibly refer to a small 

 specimen of that species itself. 



Sanguinaria Bubani, Fl. Pyren . 4 : 256. 1901. Four species are included, 

 the first of which, here taken as the type, is S. nevenarae Bub. From 

 the synonyms and illustrations cited this is seen to be S. sanguinalis. 



5. Genus LEPTOLOMA Chase. 



Leptoloma Chase, Proc. Biol. Soc. Wash. 19 : 191. 1906. Based on 

 Panicum cognatum Schult., L. cognatum (Schult.) Chase. 



6. Genus CHLORIDION Stapf. § 



Chloridion Stapf in Hook. Icon. PL 27 : 2 pi. 2640. 1900. A single 

 species, C. cameroni Stapf, from " British Central Africa: * * * Namasi, 



* For an account of the grasses in Walter's herbarium see Hitchcock, Sixteenth Ann. 

 Rept. Mo. Bot. Gard. 44. 1905. 



+ Fl. Bor. Amer. 1 : 45. 1803. 



JBot. 8. C. &Ga. 1 : 131.1816. 



&It is intended to discuss in detail this and other extra -American genera in a later 

 paper, when the spikelets of the type species will be figured. 



