146 



Chase — Notes on Genera of Panicetg. 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 Holcus striatus L. , 

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

 S. gibba. 



21. Gems HYMENACHNE Beauv. 



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

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

 (Rudge) Nees. 



22. Genus HOMOLEPIS gen. nov. 



Infloreseentia paniculata; spiculae majusculae subfusiformes; glumae 

 subaequales vel prima paulum longior, 7-!> nerviae, flosculos (et sterilem 

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

 fertili idque amplectens et paleam angustam liyalinam includens atque 

 interdum florem cum staminibus; fructus ellipticus acutus laevis nitidus; 

 lemmate paleaqne quam in Panico minus induratis, lemmatis marginibus 

 planis. 



Herbae perennes, stoloniferae, nodis radicantes; culmae floriferae basi 

 plus minusve decumbentes. 



Nomen a 6fxows similis, et \eirls squa7na. 



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 ;i> the glumes, broad, enfolding the fertile lemma, and enclosing a 

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

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

 Panicum, the margins of the lemma flat. 



PerennialsjLSending out long leafy runners, rooting at the nodes, the 

 culms)more or less decumbent at base. 



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

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

 Type Panicum aturt'nse H. B. K. 



Homolepis aturensis (II. B. K.) 



Panionn aturense 11. B. K. Nov. Gen. & Sp. 1 : 10:5. 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. L36. 1829. Habitat unknown 

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

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

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

 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. 1908; only a summary is here given. 



