‘Polystachya. | CXXXIII. ORCHIDEX (ROLFE). 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. 
Lower Guinea. Angola: Golungo Alto, near Cuango rivulet, on stems of Adan- 
Sonia, very rare, Welwitsch, 659! 
35. P. Dusenii, Kränzl. in Engl. Jahrb. 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, Dusén, 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. 
36. P. elegans, Reichb. f. Otia Bot. Hamb. 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} 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, 4 lin. long. Chin oblong-obtuse, 14 lin. long. 
Capsule broadly pyriform-oblong, 14 lin. long. 
Upper Guinea, Cameroon Mountains, 4000—6000 ft., Mann, 1338! 2113! 
In the 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, 1} in. long, 
d—4-leaved. Leaves elliptic-oblong, obtuse, 3 in. long, 5 lin. 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, 4 lin. long. Lip 
4 lin. long, very shortly unguiculate, trilobed; side lobes broadly 
rounded ; front lobe subulate-acuminate, longer than the side lobes. 
Column stout, ł lin. long. Chin saccate-obtuse, ł lin. long. Capsule 
elliptic-oblong, 2 lin. long.—P. elegans, Ridl. in Bolet. Soc. Brot. v. 
198 (not Reichb. f.). 
Lower Guinea. St. Thomas, 2600 ft., Moller, 1! Bom Successo, 4300 ft., on 
trees, Moller, 83! 
Distinct from P. elegans, Reichb, f., to which it is referred by Ridley. 
