1897.] G. King & R. Pantling— New Indo -Malayan Orchids. 579 



Oberonja subnavicularis, n. spec. Stems very short, tufted. 

 Leaves unequal, ensiform, obliquely acuminate, length *75 to 6 in., 

 breadth *25 to *5 in. Inflorescence scarcely so long as the leaves ; its 

 peduncle erect, terete, ebracteate ; raceme much longer than the pe- 

 duncle, slightly decurved, densely flowered, thick at the base and taper- 

 ing to the apex ; floral bract small, only half encircling the thick 

 ovary, lanceolate, erose. Flowers about '05 in. long. Sepals broadly 

 ovate, blunt, entire, reflexed on the ovary. Petals narrowly oblong, 

 truncate, entire, also reflexed. Lip about as long as the sepals, broad, 

 very concave from base to apex, entire, the edges coarsely retroserrate ; 

 the apex blunt, emarginate and with a broad tooth in the sinus ; upper 

 surface with a large depressed cordate nectary near the base. Lip of 

 the anther acute. 



Perak ; Scortechini, No. 1202 ; in flower in August. 



In externals this resembles 0. iridifolia, Lindl. ; but this differs in 

 having a terete wingless peduncle, a small floral bract which only half 

 encircles the ovary, linear-oblong blunt petals, and a very concave (not 

 lobed) retroserrate lip with a large nectary near its base. The late 

 Father Scortechini collected only three specimens of it, and of one 

 of these he made a drawing which is now in the Calcutta Herbarium. 



Oberonia Ritaii, n. spec. Stems very short, tufted. Leaves linear- 

 ensiform, acuminate, 1 to 5 in. long and 2 to '35 in. broad. In- 

 florescence decurved from about the middle, rather longer than the 

 leaves ; the peduncle short, terete, bracteate ; the raceme densely-flower- 

 ed ; floral bract lanceolate, acuminate, erose, longer than the stalked 

 ovary. Flowers '06 in. across, pale-green, sub-verticillate. Sepals 

 and petals sub-equal, ovate, blunt, spreading, the latter with sub-crenate 

 margins. Lip slightly longer than the sepals, and broader at the apex, 

 3-lobed, the basal lobes large, erect or slightly incurved, rounded or 

 pointed, their bases connected by a deep semi-lunar nectary ; terminal 

 lobe large, ob-reniform, the apical sinus broad and with a broad trian- 

 gular process at its apex. Capsule ovoid, ribbed, pedicelled. 



Khasia Hills; at Jowai ; elevat. 2000 to 3000 feet; S. E. Rita; 

 Mann, Gr. A. Grammie ; in flower in August. 



A species belonging to the group to which belong 0. myriantha, 

 O. recurva, O. demissa and O. micrantha ; but distinguished from all these 

 by the large erect entire basal lobes of the lip and by its broad obreni- 

 form terminal lobe. We have named it after Mr. S. E. Rita of the 

 Assam Commission, to whom we are indebted for much generous help 

 in the collection of the orchids of the Khasia Hills. 



Oberonia intermedia, n. spec. Caulescent ; stems 1 to 3*5 in. 

 long, tufted. Leaves equitant, acute, subfalcate, 1 to 2*25 in. long 



