506 NEOTTEJE—DIURID.E. 
23 poll. longa, densa. Flores Gymnadenie@ conopsee magnitudine. 
Bractez lineari-lanceolate, membranace:e, longitudine florum. Sepala 
ovata. Petala linearia, equilonga, basin versus nonnihil angustata. 
Labellum carnosum, ovatum, obtusum, concavum, intüs glaberrimum. 
CCXC. HERPYSMA. 
Herpysma. Lindl. in Bot. Reg. sub. fol. 1618. Endlich. gen. no. 1568. 
Perianthium connivens. Sepalum dorsale pauló sejunctum ; lateralia cum 
petalis antrorsium arcuatis. Labellum anticum, calcaratum, cum basi 
columne connatum, ovatum, intus versus apicem medio bilamellatum, 
apice dilatatum, rotundatum, apiculatum. Columna semiteres, clinandrio 
marginato alt® excavato.  Pollinia 2, biloba, sectilia, exacté ovata ; 
utrumque caudiculà crassà distinct4.—————Herba caulescens, dens? 
foliata. Folia petiolata basi vaginantia. Spica imbricata, lupulina, 
sessilis, terminalis. 
1. Herpysma longicaulis. Lindl. in Wall. Cat. no. 7389. 
Hab. in Napalia, Wallich. (hab. s. sp.) 
Caulis long? procurrens et radicans, demum ascendens, palmaris, foliis 
dens? tectus. Folia lanceolata, patentia, 3-4 poll. longa, in petiolum 
angustum acuminata, basi in vaginam membranaceam 4 poll. longam 
dilatata, Spica sesquipollicaris, sessilis, oblonga, multiflora; bracteis 
oblongis glabriusculis floribus subequalibus imbricata. Ovarium tomen- 
tosum. Sepala ovalia, glabra. Calcar rectum, ovarii dimidiam zquans. 
Division V. DIURIDJZE. 
CCXCI. DIURIS. 
Diuris. Smith in act. Linn, 4. p. 222. Swartz. act. holm. 1800. p. 229. t. 3. f. M. Brown, 
prodr. 1.315. Endlich. gen. no. 1584. 
Perianthium subringens. Sepala lateralia linearia, elongata, labello supposita ; 
supremum multo latius, subfornicatum. Petala unguiculata, patula. 
Labellum sessile, trifidum, ecalcaratum. Columna brevis utrinque lobo 
petaloideo aucta.  Anthera mutica, loculis approximatis. Pollinia 2, 
biloba.———— Herbs terrestres — Australasie, Tasmannie et Nove 
Zelandie, glabre ; bulbis radicalibus indivisis. Folia radicalia linearia 
pauca, Scapus vaginatus. Flores lutei v. luteScentes, rariùs purpurei aut 
albi, majusculi, spicato-racemosi. 
The species of this genus are probably very numerous. They are ex- 
tremely difficult to distinguish when dried, without the most careful analysis 
of the lip and appendages of the column. The specimens in the British 
Museum are in many cases ill dried, and few in number, so that it is difficult 
