Chase — Notes on Gaunt of Panicets. TV. 157 



PI. 3 : 1077, 1104. L883) recognizes Chaeiium as a valid genus, as does 

 Hackel (Engler & Prantl, Pflanzenf. 2 2 :33, 36. 1887) both placing it 

 immediately after Oplismenus. 



Elemsley (Biol. Cent. Amer. Hut. 3:503. 1885) transfers Berchtoldia 

 bromoidea to Chaetium giving Bentham as authority with a reference to 

 the Linnaean Society's Journal mentioned above, but Bentham did not 

 there transfer the species. 



Fournier ( Alex. PI. 2 : 40. 1886) uives Berchtoldia as a genus, including 

 in it Presl's species, and also two species of Echiuochloa. 



Description. — Inflorescence a dense, narrow panicle; spikelets short - 

 pediceled, dorsally compressed, lanceolate and having a long, slender 

 callus-like base from the elongation of the joint of the rachilla between 

 the glumes, the bearded base of the first glume adnata to it; glumes bear- 

 ing awns 3 to 4 times the length of the body of the spikelet, the first 

 reduced to the awn or, in C. bromoides, the pair broadened and enclosing 

 the rest of the spikelet ; sterile lemma bearing a shorter awn or awn-tipped 

 only, the sterile palea obsolete ; fruit subindurated, lanceolate, the lemma 

 acuminate into a scabrous awn or point, the thin margins flat, the sum- 

 mit of the palea not enclosed. Perennials with long, narrow leaves; the 

 genus containing but three known species, one of Mexico and Central 

 America, one of Cuba, and one of Brazil. 



29. Genus TRICHOLAENA Schrad. 



Tricholaena Schrad. in Schult. Mant. 2 : 163. 1824. Three species are 

 included in the genus but the second and third are preceded by a ques- 

 tion mark, hence the first, T. micranlha Schrad., of which Saccharum 

 teneriffse is given as a synonym, is the type. 



Rhyncht lytrum Xees in Lindley, Nat. Syst. ed. 2. 446. 1836. The genus 

 is described and a single species, R. dregeanum, given. We have not 

 seen the type specimen but the generic description applies to Tricliolaena. 

 Stapf (Dyer. Fl. Cap. 7 : 444. 1898) refers R. dregeanum to T. rosea Nees. 



Monachyron Pari, in Hook. Niger Fl. 190. 1849. A single species, M. 

 villosum, is included. The type specimen has not been examined. Hackel 

 (Engler c*m Prantl, Pflanzenf. 2 2 : 36. 1887) gives this as a synonym of 

 Tricholaena, and Durand and Schinz (Consp. Fl. Afr. 5 : 771. 1895) trans- 

 fer M. villosurn to this genus. Making allowance for a misunderstanding 

 of the structure of the spikelet, owing to the remote first glume, the de- 

 scription applies to Tricholaena. 



The scarcely indurated fruit, scarcely firmer than the usually 2-lobed 

 and awned second glume and sterile lemma, together with the elongation 

 of the rachilla joint between the glumes, serve to distinguish this Old 

 World genus, a single species of which, T. rosea Xees, is'sparingly escaped 

 from cultivation in the tropics and subtropics of North America. 



30. Genus CORIDOCHLOA Nees. 



Coridochloa Nees, Edinb. New Phil. Journ. 15 : 381. 1833. This genus 

 is based on a single species, " Coridochloa * * * cujus typus est 



