semiovate or oblong-obovate lateral lobes of the lip like 
T. platyceros, but the center of the dise at the base is 
marked by a distinct fleshy, pilose callus as in 7 mu- 
ralis. 
It appears to me the wiser course, as was indicated by 
Lindley on the sheet bearing the type collection of 7". 
muralis, to consider JT’. platyceros as a variant of 7" 
muralis. 
Since this concept lacks any vegetative description, it 
seems desirable to give a rather complete diagnosis as 
follows: 
Plant small to medium-sized, epiphytic. Roots fibrous, 
stout, glabrous. Rhizome creeping, more or less con- 
cealed by close, tubular sheaths. Pseudobulbs small, 
broadly ovoid, mostly concealed by sheaths or the bases 
of the imbricating leaves. Leaves two or three, clustered 
at the base of the stems, suborbicular to elliptic-oblong, 
sessile at the clasping base, prominently apiculate, up to 
about 4 cm. long and 1.4 cm. wide, coriaceous. Stems 
up to 15.5 em. high with a slender, filiform peduncle 
provided by several (two or three) short, infundibuliform 
sheaths. Raceme short, loosely up to 7-flowered. Flowers 
rather small, with spreading segments. Dorsal sepal cu- 
cullate, ovate-elliptic, acute, apiculate, 8-16 mm. long, 
up to 9 mm. wide. Lateral sepals similar, sometimes 
slightly longer. Petals similar to the sepals, but some- 
times slightly broader, ciliolate throughout. Lip about 
equaling the other segments, 8-lobed at the base, up to 
15 mm. long; lateral lobes relatively small, obliquely 
semiovate to oblong-obovate, rounded-obtuse; mid-lobe 
relatively large, obovate or oblong-obovate, rounded at 
the apex with sometimes a minute apicule; disc more or 
less pilose throughout. Column minute, densely setose. 
Ecvuapor: near Loja, Warscewics s.n. (type).—Province of Azuay, 
Cuenca, 2600 meters altitude, July 16, 1939, C. William Penland & 
Robert H. Summers 1054. 
[ 59 | 
