150. ORCHIDACE.^. [15. Geodorum. 



elliptic leaves 6-10" long. Scape coaetaneous, from base of the leafy 

 stem and lateral on the pseudobulbous base. Flowers 1*25" long and 

 about • 65" wide, pale pink with bold red lines, mentum and lip tinged 

 with yellow. 



Chota Nagpur (without precise locaUty), Wood ! Fl. May- July. 



Leaves with 4-5 very strong nerves and less strong intermediate, petiole short. 

 Kaceme sub-capitate on a stout peduncle 3-4" with long imbricate sheaths often 

 tipped with red. Bracts large cymbiform. iSepals broadly oblong, cohering, 

 mentum conical. Petals concealed by the sepals, dimidiate-oblong. Lip concealed, 

 oblong, with large lateral entire incurved lobes and a small triangular terminal 

 lobe with undulate edges and a thickened ridge down the middle. 



12. PACHYSTOMA, Blume. 



Terrestrial orchids with a nodose rhizome or pseudobulb. Leaves 

 1-2 narrow plaited appearing after flowering. Flowers mod. -sized or 

 rather small, pendulous on racemes, the bases of which are sheathed 

 with bracts ; floral bracts large scarious. Sepals subequal, lateral 

 adnate to the base of the column. Lip sessile on the base of the 

 column, erect, side-lobes oblong, midlobe small, centre usually ridged 

 with 3-5 deeply crested or fimbriate ridges. Column slender, clavate 

 above, produced into a foot below, anther 4-celled, deciduous, pollinia 

 8, pyriform, connected by viscus at their base. 



1. P. senile, Reichb. 



A graceful ground orchid with very long scapes and no leaves at 

 the time of flowering, 12-18" high. Flowers medium -sized, drooping, 

 a delicate pink colour (in my specimens) or white or greenish {F.B.I.). 

 Sepals white or pink -3- -4" acute or acuminate 5-nerved, petals 

 slightly longer, narrowly spathulate, acuminate, 3-nerved, forming a 

 very short sac at base, lip short from oblong " to nearly orbicular " 

 {F.B.I.), Avith very short claw, side-lobes oblong obtuse or subacute, 

 midlobe oblong or obovate, refuse or pointed, throat with 5 emerald 

 green or yellow crested lamellae from the base to the midlobe. Top 

 of column with 2 incurved horns. 



Frequent in grassy places in the northern tract, especially towards the Sikkim 

 Tarai ! Bettiah, Hieronymus ! Fl. Feb.-May. 



Bulbous. Leaf appearing after flowering, long narrow and plicate. Base of scape 

 with strongly-nerved premorse or erose dry sheaths, bracts long hnear. Flowers 

 with ovary about • 7- • 8" long, glandular-puberulous. 



15. GEODORUM, Jack. 

 Ground orchids with a tuberous rootstock and plicate leaves. 

 Scape from the rootstock, stout erect sheathed, shorter than the leaves ; 

 floAvers crowded in decurved racemes with narrow membranous 

 bracts. Petals broader than sepals, conniving or spreading. Lip 

 sessile on the base or short foot of the column, cymbiform, mem- 

 branous, Avith involute margins, palate with or without ridges ending 

 in calli, and with a forked basal callus. Column short, stout, anther 

 2-celled, appendaged after dehiscence by the persistent detached 

 faces of the cells ; pollinia 2, broad foveolate sessile or subsessile on a 

 broad strap or gland. 



1169 



