( 3686 ) 
Z.YGOPETALON MAXILLARE. 'TREE-F'ERN 
ZY GOPETALON. 
KEKE EEE EEE EEE EKER ERE 
Class and Order. 
GyNANDRIA Monanpria. 
( Nat. Ord.—Orcuivez. ) 
Generic Character. 
Perianthium explanatum, sepalis petalisque ascenden- 
tibus subequalibus, cum ungue producto columne conna- 
tis. Labellum muticum, indivisum, patens, ungue ascen- 
dente ; crista magna, transversa, carnosa. Columna brevis, 
arcuata, semiteres. Anthera subbilocularis. Pollinia 2, 
bipartibilia, in glandulam transversam subsessilia.—Herbe 
epiphyte, subacaules ; foliis plicatis patentibus. Flores spe- 
ctost, labello ceruleo. Lindl. 
Specific Character and Synonyms. 
ZyGoPrETALON maxillare ; pseudo-bulbis oblongis sulcatis, 
foliis lanceolatis nervosis basi attenuatis, sepalis peta- 
lisque ovato-oblongis acutis subeequalibus, labelli tri- 
lobi obtuse calcarati lobis lateralibus erectis crista un- 
guliformi crenato maximo unitis intermedio patente 
majori subrotundo. , 
ZYGOPETALON maxillare. Lodd. Bot. Cab. t. 1776. Lindl. 
Gen. et Sp. Orch. p. 188. 
A very beautiful epiphyte, remarkable for the colour of 
the labellum, which is a rich and very deep purple, and 
still more so for the form of the large callosity at its base, 
which Mr. LoppieEs compares to the lower jaw of an ani- 
mal, and which in shape resembles a horse’s hoof. If well 
grown this is one of the most beautiful of its tribe, for it 
has in its native forests a rhizoma more than six feet in 
length, while from the tops of its branches the racemes of 
flowers: 
