NOVELTIES IN THE ORCHID FLORA 
OF THE GUAYANA HIGHLANDS * 
BY 
CHARLES SCHWEINFURTH 
THE present paper, which is the first of two articles deal- 
ing with novelties in the Orchidaceae of the Guayana 
Highlands, treats eleven new species. The order follows 
that of the System proposed by Dr. Rudolph Schlechter 
in Notizblatt des Botanischen Gartens und Museums, 
Berlin-Dahlem 9, No. 88 (1926) 563-591. 
Duckeella alticola C. Schweinfurth sp. nov. 
Herba terrestris, pro genere robusta, nigrescens, cir- 
citer 50 cm. alta. Caulis glaber, saepissime superne in- 
aequaliter bifurcatus. Folia valde coriacea, biformia; 
basalia pauca, oblongo-linearia, acuta, suberecta, usque 
ad 19 vel 22 cm. longa et 9-16 mm. lata; caulina duo, 
multo breviora, remotissima, elliptico-oblonga, acuta, 
8.7-10 cm. longa, usque ad 1.8 cm. lata. Racemi in 
ramorum apice, densius pauci- vel pluriflori. Flores 
mediocres, aurei. Sepala crassa, concava, marginibus in- 
curvis. Sepalum dorsale oblongo-ellipticum, acutum, 
circiter 2 cm. longum et 8.2 mm. latum. Sepala lateralia 
persimilia, dorso carinata. Petala latiora, ovalia vel late 
* For the privilege of studying the extensive collections recently 
made in this region, I am indebted chiefly toa grant from the National 
Science Foundation. 
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