GENERA MICROSTYLIS AND MALAXIS. 327 
The plants quoted from Pavon and Capt. Lyon differ somewhat 
from the common typical form of fastigiata in their narrower 
leaves generally a little distant from each other and in the more 
slender pedicels, and possibly they may form a distinct species. 
But the flowers seem to be quite identical, and I am unwilling 
to give fresh names to plants so dubiously distinct. A specimen 
from the neighbourhood of Mexico, collected by Schmidt, has 
the lowest bracts unusually long and lanceolate acuminate, one 
nearly 4 inch in length. 
21. MrcROsTYLIS LONGISEPALA, D. SP. l 
Caulis gracilis 6-uncialis ; folia ovata obtusa, 3 uncias longa, 
13 uncias lata, dissita; scapus 6-uncialis validulus paullisper 
marginatus; umbella 4-uncialis; flores pro sectione majusculi 
virides, pedicellis l-uncialibus capillaceis; bractem brevissim® 
ovate lanceolate ; sepala lanceolata obtusa, marginibus revolutis, 
4 mm. longa; petala angusta linearia; labellum 3 mm. longum, 
ovatum acuminatum, acutum, basi saccatum, fovea ovata, mar- 
ginibus carnosis, costa mediana elevata, auriculis nullis. 
Mexico, Parada, near Oaxaca, Sallé! in Herb. Brit. Mus. 
Very near M. fastigiata, especially the form collected by 
Pavon, but the flowers are larger, and the longer sepals are very 
conspicuous. 
22. M. convMBosa, S. Wats. in Proc. Amer. Acad. xviii. 1888, 
P. 195 ; Contrib. Amer. Bot. xi. p. 195. m 
Pseudobulbus globosus uncialis; caulis validulus 3-uncialis, 
Vagina ampliata subacuta unciali ad basin; folium singulum 
ovatum subobtusum reticulatum amplexicaulg-3 uncias longum, 2 
uncias latum ; scapus crassiusculus angulatus tres uncias longus ; 
racemus vix uncialis; flores parvi, pedicellis 3-uncialibus graci- 
libus erectis, basi dilatata articulata; bractes minime lanceolate 
demum reflex; ; sepala angusta lanceolata acuminata acuta ; 
petala angusta ligulata; labellum obspathulatum, basi plana late 
subquadrata, venis tribus obscurioribus in medio, apice angustata 
lanceolata acuminata acuta. 
Arizona, Huachuca Mountains, Lemmon, 2882 ! 
23. M. ventricosa, Poepp. & Endl. Nov. Gen. et Sp. p. 8. 
Rhizoma longa repens teres lignosum ; caules erecti ascend- 
entes incrassati tunica vel vagina integra modo superne fissa, e 
vaginis foliorum connatis exorta, basi valde clavata sensim 
