1923 
3" 
* TRIGONÍDIUM obtúsum. 
Blunt-petalled Trigonidium. 
ea 
if 
GYNANDRIA MONANDRIA. 
Nat. ord. Oncumacr, $ VANDEA. | 
TRIGONIDIUM. Sepala equalia, semiherbacea, in cyathum trigonum 
isoscelem cohaerentia, apice patula. Petala corollina, duplo minora, venosa. 
Labellum nanum, trilobum, cum columná articulatum, BAS carnosum. Co- 
lumna nana, libera, semiteres. Anthera unilocularis. Pollinia 4, cohserentia, 
minoribus dorsalibus, in glandulam triangularem stigma parvum triangulare tegen- 
tem insidentia. Herbe epiphyte, Americane, rhizomate repente florifero ! 
et pseudobulbifero. Folia coriacea. Pedunculi erecti, uniflori, vaginati. 
T. obtusum ; folis lineari-lanceolatis, vaginis acutis, sepalis obovatis, petalis 
obtusis, labello dorso tuberculato, anthera glanduloso-pilosá. 
Pseudobulbi compressi, oblongi, obsolete striati, in plantá spontaned 
per duas uncias distantes, in rhizoma scapos plurimos promens insidentes. 
Folia cuique pseudobulbo duo, angustè lanceolata, pedalia, sesquiunciam 
lata, ferè enervia. Bateman in litt. Pedunculi palmares, erecti, foliis bre- 
vores; vaginis 5, convolutis, acutis, pedunculo appressis, superiore ovario 
breviore. Sepala obovata, obtusa, basi quasi agglutinata în cyathum tri- 
gonum petalorum longitudine, luteo viridia, versus apicem fuscescentia. 
Petala alba, apice aurantiaco-fusca et callosa, venis purpureis ornata. 
Labellum petalis plus quam duplò brevius, trilobum, ari et lobo medio car- 
nosis, infra apicem extús tuberculatum. ^ Anthera glandulis piliformibus 
cristata, 1-locularis. 
For the opportunity of publishing this curious plant I am 
indebted to Mr. Bateman, who sent it me in August 1836, 
with the following note:— 
M 
“ This singular plant I owe to the exertions of Mr. Colley 
in Demerara. I received it from thence in the summer of 
1834; the entire plant, at the time of its importation, con- 
* Named in allużiofiito the triangular form of several parts; the sepals form 
a 3-cornered cup, the gland on which the pollen masses rest is an obtuse-angled 
triangle ; and the stigma is a triangular excavation. 
