314 ORCHIDEJE, 
Pollinia flavida oblique, dente postica columna rigida subu- 
lata. Ovarium viridium. : 
Has. In Mangiferain oppido Tenasserim : Feb. 1835. This 
is a lovely species, apparently very nearly allied to D. fim- 
briatum. 
Mergue Herb. 1040. 
8. Dendrobium tri-petaloides. Roxb. 
The pseudobulbs of this species owe their whitish partial 
flocculent appearance to the existence of an external layer of 
cellular tissue on which numerous fibrous cells are developed, 
these cells vary much in form from round ovate to oblong, 
which last have the appearance of obtuse spiral vessels, in 
these the fibre is incomplete and the ends generally dilated. 
They are easily unrolled, and then present the appearance of a 
compound spire the direction of the fibre is from left to right? 
9. Dendrobii sp. 
Caulescens, 3-6 uncialis, caulibus superem attenuatis, in- 
ferne vaginam reliquis obtectis, fol. vaginantibus lineari-oblon- 
gis, venosis apicibus obliquis. 
Racemis flexuosis pseudo-extra axillaribus, foliis breviorib. 
Bracteis membranaceis longitudine pedicellorum, floribus 
albis ineonspicuis. 
Per. explanat. Sepalis linearibus acutis, postico libero, la- 
teralibus basi valde obliquis, inter se et cum pede columns 
elongato in calcare conicum demum subincurvum connatis. 
Pet. conformia, angustiora, alba. 
Labellum cucullatum cum pede columna continuum lanceo- 
latum a medium supra, pulchre sinuato repando crispatum- 
que, albidum, venulis lzte viridescentis lineis approximatis, 
3-clavatis albis a basi ad medium usque current. 
Columna nana semiteres pede multo brevior apice denticu- 
lata, dento postica media subulata, reliquis longiora anther 
Anth. 2-locularis, loculis obsolete 2-locular, connec- 
tivum grande carnosum. Pollinia 4, maxima per paria cohæ- 
