Pteroglossaspis. | CXXXII. ORCHIDEÆ (ROLFE). 99 
12. PTEROGLOSSASPIS, Reichb. f.; Benth. et Hook. f, 
Gen. Pl. iii. 542, 
Sepals and petals free, spreading, subequal. Lip sessile at the base 
of the column, spreading, trilobed, ecalcarate; side lobes somewhat 
spreading at the base, inflexed above; front lobe larger, oblong or sub- 
orbicular ` dise with three rows of tuberculate nerves and a pair of 
rounded calli in the angle formed by the base of the lip and column. 
Column very short and broad, without a foot; clinandrium rounded. 
Anther terminal, operculate, incumbent, 1-celled; pollinia 2, sub- 
globose, or 4 confluent in pairs, affixed to a short, broad stipes and 
squamiform gland.—Terrestrial herbs, with thickened rhizome. Leaves 
one or two, petiolate, narrow, plicate. Scapes erect, with membranous 
sheaths below. Flowers medium-sized, in short dense racemes. Bracts 
small or narrow. 
An endemic Tropical African genus of four species, nearly allied to Eulophia, but 
distinguished by the sessile, ecalcarate lip, and very short column. Bentham places it 
in the subtribe Cyrtopodiee, near to Zygopetalum, which, however, is not where its 
affinity lies. 
Nerves of lip tuberculate, 
Front lobe of lip suborbicular-oblong, very obtuse; disc 
5-7-nerved i S i : : : . L. P. eustachya, 
Front lobe of lip nearly obcordate, emarginate; disc 
3—5d-nerved : > e : e , 2. P. engleriana. 
Nerves of lip slightly verrucose. 
Lobes of lip subequal . : : , 3. P. ruwenzoriensis. 
Front lobe of lip twice as broad as side lobes e a 4, P. Carsoni. 
l. P. eustachya, Reichb. f. Otia Bot. Hamb. i. 67. Terrestrial, 
with stout rhizome. Leaves radical, narrowly lanceolate, acute or 
acuminate, 4-11 ft. long, narrowed below into a long petiole. Scape 
24-22 ft. high, with numerous, long, imbricate sheaths, the lower 
obtuse, the upper acute. Bracts lanceolate or ovate-lanceolate, acumi- 
nate, 7-9 lin. long. Sepals and petals oblong or elliptical-oblong, sub- 
obtuse or minutely apiculate, 5-6 lin. long. Lip sessile, trilobed, 
ecalcarate ; side lobes divaricate, broadly oblong, obtuse, very slightly 
curved, 3 lin. long; front lobe quadrate-elliptic or broadly elliptic- 
oblong, obtuse, flat; disc with about five to seven tuberculate keels, 
and a pair of rounded calli in the angle between the lip and column. 
Column broad, 2 lin. long. 
Nile Land. Abyssinia: Schimper, 1235! (1735, ex Reichenbach.) 
2. P. engleriana, Kränzl. in Engl. Jahrb. xix. 249. Leaves 1} ft. 
long, 7 lin. broad. Scapes longer than the leaves, terminating in short, 
capitate racemes, 3-11 in. long. Flowers 4 in. diameter, white with a 
purple-brown stripe on the side lobes of the lip, and a purple spot on 
the front lobe. Sepals cuneate-obovate, obtuse or apiculate, keeled 
at the back. Petals obtuse, narrower than the sepals, especially at 
the base, in other respects similar. Lip trilobed; side lobes obovate- 
oblong, very obtuse, embracing the column; nerves and ridges of the 
dise and side lobes very sparsely pilose; callus elevated at either side 
