Polystachya.'] cxxxiii. orchide^ (kolfe). 119 



dilated from a cuneate base, trilobed ; side lobes obtusely angled ; front 

 lobe large, broad, semiovate, emarginately bilobed; disc copiously 

 hairy; callus swollen, pilose, oblong, narrow at the extreme base. Chin 

 acutely angled, 1 lin. long. 



IiOTirer Guinea. Angola : Golungo Alto, near Cuango rivulet, on stems of Adan- 

 sonia, very rare, Welioitsch, 659 ! 



35. P. Duseniiy Krdnzl. in Engl. Jahrh. xix. 250. Stems 

 aggregated, elongate, slender, 2-3-leaved. Leaves recurved, linear, 

 apex bilobed ; lobes rounded. Scapes as long as the leaves, setose. 

 Bracts long-aristate, shorter than the ovary, deflexed after flowering. 

 Flowers tessellated. Dorsal sepal oblong, obtuse, minute; lateral 

 forming a very obtuse galea at the base ; apex mucronate. Petals 

 linear, acute, much smaller than the sepals. Lip cuneate ; side lobes 

 semiobovate, ascending, implicate ; front lobe triangular, acuminate, 

 deflexed. Column very stout. Chin very obtuse. 



Upper Guinea. Cameroons, Dusen, 261. 



Only known to me from the original description. It is allied to P. tessellata, 

 Lindl., but is much dwarfer. The largest specimen is said to be only 8 in. high. 



3G. P. elegansy Reichb. f. Otia Bot. Hamh. ii. 113. Plant 1 ft. 

 high. Stems stoutish, cylindrical, 3-4-leaved, 3-5 in. long. Leaves 

 linear-oblong, obtuse, 3-5 in. long, 4-7 lin. broad. Panicles 4-5 in. 

 long, branched ; branches densely puberulous, many-flowered. Bracts 

 setaceous, acuminate from a slightly broader base, 1-1 J in. long. 

 Pedicels 1 lin. long. Dorsal sepal ovate-oblong, acute, concave, 1 lin. 

 long ; lateral triangular-ovate, acuminate. Petals lanceolate-oblong, 

 acute, 1 lin. long. Lip 2 lin. long, broadly unguiculate ; side lobes 

 rounded, obtuse ; front lobe broadly triangular-ovate, mucronate ; disc 

 glabrous. Column stout, J lin. long. Chin oblong-obtuse, \\ lin. long. 

 Capsule broadly pyriform-oblong, 1^ lin. long. 



Upper Guinea. Cameroon Mountains, 4000-6000 ft., Mann, 1338 ! 2113 ! 



In tlie dried state the flowers become a dull cinnabar-orange colour. A plant 

 from the island of St. Thomas, which has been referred here by Ridley, is distinct. 

 See next species. 



37. P. Ridleyi, Rolfe. Pseudobulbs fusiform-oblong, H in. long, 

 3-4-leaved. Leaves elliptic-oblong, obtuse, 3 in. long, 5 iiu. broad. 

 Inflorescence racemose. Bracts setaceous, reflexed, 2-3 lin. long. 

 Pedicels short. Dorsal sepal triangular-ovate, acuminate, 1 lin. long ; 

 lateral broader and more acuminate. Petals filiform, J lin. long. Lip 

 I lin. long, very shortly unguiculate, trilobed; side lobes broadly 

 rounded ; front lobe subulate-acuminate, longer than the side lobes. 

 Column stout, \ lin. long. Chin saccate-obtuse, J lin. long. Capsule 

 elliptic-oblong, 2 lin. long. — P. elegans, Ridl. in Bolet. Soc. Brot. v. 

 11)8 (not Peichb. f.). 



Iiower Guinea. St. Thomas, 2600 ft., Jloller, 1 ! Bom Successo, 4300 ft., on 

 trees. Holler, 83 ! 



Distinct from P. elegans, Reichb. f., to which it is refen-ed by Ridley. 



