Notes on genera of Paniceae : I-IV . sunderstood Lamarcksspecies. Agrostis monostachya Poir. 1810, Encyc. : 256. Cette plante a ete recueillie a Porto-Bicco,par M. Riedle. (V. s. in herb. Desfont.) The type labeled in Poirets hand, Agrostis mo-nostachya Poir. enc. sup. Reidel Porto-Ricco, wasexamined by Professor A. S. Hitchcock* in the Des-fontaine herbarium at Florence. The accompany-ing figure is drawn from this specimen. Panicum myuros Lam. (incorrectly given as Agros-tis myuros Lam.) cited by Beauvois under Hy-menachne is not the same species as Agrostis mono-stachya Poir., as most
Notes on genera of Paniceae : I-IV . sunderstood Lamarcksspecies. Agrostis monostachya Poir. 1810, Encyc. : 256. Cette plante a ete recueillie a Porto-Bicco,par M. Riedle. (V. s. in herb. Desfont.) The type labeled in Poirets hand, Agrostis mo-nostachya Poir. enc. sup. Reidel Porto-Ricco, wasexamined by Professor A. S. Hitchcock* in the Des-fontaine herbarium at Florence. The accompany-ing figure is drawn from this specimen. Panicum myuros Lam. (incorrectly given as Agros-tis myuros Lam.) cited by Beauvois under Hy-menachne is not the same species as Agrostis mono-stachya Poir., as most subsequent authors seemedto think. The type of this was seen in Lamarcks herbarium in Paris, * Notes on Paniceae I, with general discussion of the importance of the fruit as ageneric character in this tribe appeared in Proc. Biol. Soc. Wash., 19:183-192. Dec. 1906. + Canon 15, b. t All the type specimens definitely mentioned as found in the different Europeanherbaria were examined by Professor A. S. Hitchcock in the spring of Fig. 1. Hymenachne amplexi-eaulis. 1—Proc. Biol. Soc. Wash., Vol. XXI, 1908. (1) 2 Chase—Notes on Genera of Panicese. II. and was found to be a congener of Sacciolepis striata (L.) Nash., Pan-icum indicum, and allied species. Beauvois emphasizes the simple spike-like panicle, and also the realdistinguishing character of the genus, the membranaceous lemma andpalea, to which latter character the name refers, De v^v Membrana; &x V Palea. But, probably because he did not know Lamarcks species,Beauvois included in Hymenachne P. myuros which does not have a mem-branaceous lemma and palea. Subsequent authors have placed in thegenus or section Hymenachne various Panicum allies having a spike-likepanicle, but often without other similarity. It is not evident whetherBeauvois considered the two species he cites synonymous or not. In theindex only Hymenachne myuros is given; A. monostachya is not formallytransferred and is not mentioned in the index. Roeme
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