328 MR. H. N. RIDLEY’S REVISION OF THE 
attenuata inflata ventricosa membranacea diaphana nervosa; 
folia ovato-oblonga acumine longo acutissimo, basi rotundata 
subtus acute carinata, carina valde prominente per vaginas 
decurrente, lamina seniorum 5 uncias longa, 13 lata; scapus, 
biuncialis ; racemus ovalis subcylindricus, fructifer magis capita- 
tus; pedicelli patuli infimi recti superioris erecti, quam ovarium 
duplo longiores, capsule equales; bracteissubulatis; flores minuti 
virides iis M. monophyllos majores; perianthium eo M. rupestris 
similis labello ad apicem angustior ; labellum subrotundum sagit- 
tatum hemisphericum concavum, apice acuminato reflexo ; 
capsula 5 lineas longa, ovalis. 
Peru, Pampayaco, Poeppig. 
24. MICROSTYLIS RUPESTRIS, Poepp. (y Endl. Nov. Gen. et 
Sp. p. 8, pl. iii. 
Pedalis et ultra; caulis subgracilis 8-uncialis, pseudobulbo 
ovali, nuclei cerasi magnitudine, vaginis membranaceis tecto; 
folia bina angusta, ovalia vel ovali-lanceolata subdissita, approxi- 
mata, utrinque acuta, nitida, subtus acute carinata, ssepius valde 
insqualia 2 uncias vel ultra longa, unciam lata; scapus erectus 
medio subcurvus pentagonus 8-uncialis; racemus hemispherico- 
capitatus multiflorus uncialis ; flores pro sectione majusculi 
flavidi resupinati, pedicellis erecto-ascendentibus capillaceis, 
j-uncialibus, quam ovarium duplo vel triplo longiores ; bracte® 
minut® subulate, ovato-lanceolatw ; sepala obliqua lanceolata 
acuta; petala filiformia, sepalis triplo angustiora; labellum 
hemispherieum intus concavum, apice acuminata; auriculis 
minimis triangularibus; columna basi dilatata; capsula ovalis, 
4 lineas longa, tricarinata. 
Peru, Cassapi, Poeppig ; Venezuela, Tovar, Fendler ! 
25. M. nnacHysTAOuys, Reichb. f. in Linnea, xxii. p. 834; 
Walp. Ann. iii. p. 26. 
Caulis elongatus vaginatus monophyllus; folio ovali obtuso 
acuto, basi cordata, racemo brevissimo, densifloro fastigiato; bracteæ 
ovate acute; sepala oblonga obtusa; petala linearia obtusa ; 
labellum ovale, basi cordata acuta transversa. 
Mexico, Real del Monte, Ehrenberg. 
The description of this species is hardly sufficient for so critical 
a section of the genus. Nevertheless it seems quite distinct in 
the shape of the lip from any other Mexican species known to 
me. It is probably allied to M. corymbosa, S. Wats. 
