GENERA MICROSTYLIS AND MALAXIS. 321 . 
and I am unwilling to unite the two. M. Ehrenbergii is de- 
scribed as having a * labellum oblongum acutum. . . . . gibbere 
acuto in media parte basilari.” M. porphyrea has no distinct 
fovea; the lip is concave at the base, but not saccate, as in some 
other species. 
I quote the description of M. Ehrenbergii for comparison.— 
“ M. Ehrenbergii, Reichb. f. in Linnea, xxii. p. 835.— Caulis 
basi vaginatus, medio monophyllo; folium oblongum, basi et 
apice attenuatum ; racemus plurimiflorus; bractex ovate seu 
oblonge acute 1-3-nervim, pedicellis breviores; flores postici, 
atro-purpurei; sepala oblonga acuta; petala linearia; labellum 
oblongum acutum, basi dilatatum ima basi biaurito; auriculis 
minimis nunc obsoletis, gibbere acuto in medio parte basilari. 
“ Mexico, Real del Monte, Ehrenberg.” 
7. MICROSTYLIS GRACILIS, n. sp. 
Caulis gracilis, 3-uncialis ; folium singulum erectum oblongum, 
lj uncias longum, 2 unciam latum; scapus 4-uncialis, dimidio 
nudo, gracilis ; flores minimi dissiti, pedicellis circiter 1 mm. longi; 
bracte® lanceolate brevissime, pedicellis squales ; sepala ovata 
acuta, posticum quam lateralia majus; petala linearia acuminata ; 
labellum sepalis brevius ovata cuspidata subacuta, fovea majus- 
cula nec profunda auriculis subnullis; columna brevissima, steli- 
diis dentiformibus. 
Guatemala, Amazola and Tinula, at 1700 feet, 14th July, 1882, 
Lehmann, no. 1846! Very rare. In Herb. Brit. Mus. 
§ Spicate. l 
8. M. pisEPALA, Reichb. f. in Linnea, xxvi. p. 142. 
Caulis cylindraceus, pseudobulbosus pollicaris, vaginis membra- 
naceis oblongo-triangulis vestitus; folia evoluta bina e vaginis 
linearibus in laminas orbiculares acutas dilatata ; scapus elongatus 
7-pollicaris angulatus, apice clavato racemoso ; bracteæ lineari- 
lanceolatæ brevissimæ; pedicelli elongati; flores colore terreno ; 
sepalum posticum lanceum triangulum obtusiusculum, lateralia 
connata oblonga, apice bidentato ; petala linearia circinnata ; la- 
bellum orbiculare, basi obtusissime cordatum, margine obsole- 
tissime undulato lobulato, basi foveata; columna minuta, rostello 
tridentato. 
Venezuela, near Curucuti, 2000-8000 feet alt., Wagener, no. 134. 
This seems to be very near M. rotundata, but apart from the 
connate lateral sepals, which may be accidental, the petals in that 
