146 Chase — Notes on Genera of Panicecz. IV. 



20. Genus SACCIOLEPIS Nash.* 



Sacciolepis Nash in Britton, Man. 89. 1901. Based on a single species, 

 S. gibba (Ell.) Nash, which is the same species as Hole us striatus L. , 

 the latter name being later transferred to Sacciolepis by Nash to replace 

 <S Y . gibba. 



21. Genus HYMEN ACHNE Beany. 



Hymenachne Beauv. Ess. Agrost. 48. t. 10. f. 8. 1812. The type species 

 is Agrostis monostachya Poir., which is the same as H. amplexicaulis 

 (Rudge) Nees. 



22. Genus HOMOLEPIS gen. nov. 



Inflorescentia paniculata; spiculae majuscnlae subfusiformes ; ghnnae 

 subaequales vel prima panlum longior, 7-9 nerviae, flosculos (et sterilem 

 et fertilem) occultantes; lemma sterile vix glumis aeqnilongum, latins 

 fertili idque amplectens et paleam angnstam hyalinam inclndens atque 

 interdum florem cum staminibus; fructus ellipticus acutns laevis nitidus; 

 lemmate paleaque quam in Panico minus indnratis, lemmatis marginibns 

 planis. 



Herbae perennes, stoloniferae, nodis radicantes; cuhnae floriferae basi 

 pins minusve decumbentes. 



Nomen a 6/xoios similis, et \eirls squama. 



Inflorescence paniculate; spikelets rather large, subfusiform; first and 

 second glume equal or the first slightly the longer, 7- to 9-nerved, the pair 

 wholly covering the sterile and fertile florets; sterile lemma nearly as 

 long as the glumes, broad, enfolding the fertile lemma, and enclosing a 

 narrow hyaline palea and sometimes a staminate flower; fruit elliptic, 

 pointed, smooth and shining, the lemma and palea less indurated than in 

 Panicum, the margins of the lemma flat. 



Perennials, sending out long leafy runners, rooting at the nodes, the 

 flowering culms more or less decumbent at base. Confined to the tropics 

 of the western hemisphere. Name from 6fxoios, alike, and Xe7r/s, scale. 



Type Panicum aturense H. B. K. 



Homolepis aturensis (H. B. K.) 



Panicum aturense H. B. K. Nov. Gen. & Sp. 1 : 10.3. pi. 33. 1816. 

 "Crescit ad cataractas Aturensis." The type specimen, in the Bonpland 

 Herbarium in the Museum d'Histoire Naturelle at Paris, consists of a 

 simple flowering culm, decumbent at base. The label bears the name 

 and data as published. 



Panicum viridiflorum Nees, Agrost. Bras. 135. 1829. Habitat unknown 

 to Nees. The type specimen in the Berlin Herbarium is labeled "fib. 

 Nees. Panicum viridifloruin. Panicum aturense Kth.," followed by a 

 diagnosis. Nees distinguishes his plant from P. aturense by the 7- to 9- 

 nerved glumes and sterile lemma, these being erroneously described by 

 Kunth as 3-nerved. 



* This and the following genus were discussed and the spikelets of the type species 

 figured in Proc. Biol. Soc. Wash. 21 : 1-10. 190S; only a summary is here given. 



