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118 Chase — Notes on Genera of Panicece. IV. 



Herbarium, is the villous form represented in the National Herbarium by 

 Novaes 1248, Campinas, Brazil. 



Echinolaena polystachya H. B. K. Nov. Gen. & Sp. 1 : 119. 1816. 

 " Crescit in ripa fluminis Magdalenae inter Tenerife et Zambrano." 

 A part of the type, labeled "Echinolaena polystachya H. B. K. in ripa 

 fluminis Magdalena, ex herb. Hurab. & Bonpl.," was examined in 

 the Berlin Herbarium. As indicated by Nees (Agrost. Bras. 129. 

 1S29) and Trinius (Mem. Acad. St. Petersb. VI. Sci. Nat, 3 : 2 240. 

 1834) this is the same as Panicum uncinatum Raddi. 



Panicum uncinatum Raddi, Agrost. Bras. 41. 1823. "In sylvaticis 

 prope Catumby, non procul ah Urbe Rio de Janeiro." An authentic 

 specimen from Raddi (probably a duplicate type) was examined in the 

 herbarium of the British Museum. 



Panicum heteranthum Link, Hort. Berol. 1 : 212. 1827. " Hab. in 

 Brasilia." An authentic specimen from the Berlin Botanical Garden 

 was examined in the Trinius Herbarium. The description also identifies 

 the species. 



Panicum glandulosum Nees, Agrost. Bras. 129. 1829. " Habitat in 

 sylvis ad Xipoto et ad Rio Jequetinhonha flumina (Martins)" is the first 

 specimen cited, "in confinihus regni Paraguayani legit Sellovius (Vidi 

 in Herb. Reg. Berol.)" an additional one. The Sellow specimen was 

 examined at the Berlin Herbarium. Nees gives Echinolaena polystachya 

 II. B. K. and Panicum uncinatum Raddi as synonyms. Trinius (Gram. 

 Pan. 174. 1826) gives " Panicum glandulosum N. ab Es. in litt." (as well 

 as P. uncinatum and Echinolaena polystachya) without description as a 

 synonym of Panicum nemorosum Swartz var. /3. 



Echinolaena Trinii Zoll. & Mor. Syst. Verz. Zoll. 102. 1846. Based on 

 "Panicum uncinatum Trin. v. 3. non Brown." The reference to Trinius 

 is probably to the " Panicearum Genera" (Mem. Acad. St. Petersb. VI. 

 Sci. Nat. 3: 2 240. 1*34). The name published by Brown is P. uncin- 

 ulatum not P. uncinatum. 



Panicum echinatum Willd. ; Doell in Mart. FI. Bras. 2: 2 193. 1877. 

 (( ^K^ This herbarium name is given as a synonym of P. uncinatum Raddi. 



The specimen, in the Willdenow Herbarium, bears the data " Magdalena, 

 Humboldt," and is doubtless a duplicate of the type of E. polystachya. 



Immature specimens of this species bear a superficial resemblance to 

 Ichnanthus nemorosus (Sw.) Doell, and allied species. Trinius, as seen 

 above, at first included it as an unnamed variety of Panicum nemorosum, 

 but later (Gram. Icon. 2: pi. 216. 1829) gives Panicum uncinatum as a valid 

 species, explaining that though it resembles P. nemorosum it differs in 

 having a subcoriaceous lower floret, and, in the upper racemes, spikelets 

 in which the prickles of the " inferior glume " [the plate shows the second 

 glume is intended] are so dense and long as to produce a resemblance to 

 spikelets of Lappago [ Nazia] . Because of the racemose inflorescence 

 Trinius here and in the Panicearum Genera (Mem. Acad. St. Petersb. 



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