Octomeria flaviflora C. Schweinfurth sp. nov. 
Herba elata, caespitosa, terrestris. Caules pluriarticu- 
lati, usque ad 47 cm. alti, vaginis longe tubulatis mar- 
cescentibus maxima pro parte obtecti. Folium erectum, 
lineari-oblongum, apice minute tridenticulatum, basi 
sessile, valde coriaceum, usque ad 18 cm. longum et 1.4 
em. latum. Flores numerosi, in glomerulis axillaribus, 
flavi, membranacei, cum segmentis patentibus. Sepala 
petalaque lanceolata, acuminata, trinervia. Sepalum dor- 
sale longe acuminatum, 8-11 mm. longum, 8-8.5 mm. 
latum. Sepala lateralia simillima, paulo obliqua, 8-11 
mm. longa, 2.2-8.1 mm. lata. Petala paulo breviora, 
ovato-lanceolata, saepissime latiora, circiter 7-9.2 mm. 
longa, usque ad 4mm. lata. Labellum segmentis ceteris 
multo minus, in circuitu ovato-oblongum, usque ad 5 
mm. longum et 3 mm. latum, prope basim trilobatum; 
lobi laterales perparvi, anguste falcato-oblongi; lobus 
intermedius comparate magnus, oblongo-ovatus, apice 
saepissime subtruncatus et medio acutus, cum margini- 
bus denticulato-erosis; discus callis binis humilibus orna- 
tus. Columna parva, arcuata, usque ad 3-4 mm. alta, 
in pedem brevem producta. 
Amazonas: Cerro de la Neblina, Rio Yatua, at 2000 meters altitude, 
locally frequent in rocky ravine 16 kilometers southwest of Cumbre 
Camp, December 1-2, 1957, Bassett Maguire, John J. Wurdack & Celia 
K. Maguire 42280; Same locality, at 1900-2000 meters altitude, locally 
frequent in upper Cafion Grande basin above Salto Grande, December 
13, 1957, Maguire, Wurdack & Maguire 42362; Cerro Sipapo (Paraque), 
at 1600 meters altitude, occasional along streambanks in Cafio Pro- 
fundo, January 12, 1949, Bassett Maguire & Louis Politi 28315; Cerro 
Huachamacari, Rio Cunucunuma, at 1800 meters altitude, occasional 
on left bank of Cafio de Dios in cumbre near Summit Camp, December 
6, 1950, Bassett Maguire, R. S. Cowan & John J. Wurdack 30024 (Tyre 
in Herb. Ames No. 69523); Same locality and altitude, locally fre- 
quent in dense woodland in cumbre along right fork of Cafio de Dios 
near Summit Camp, December 13, 1950, Maguire, Cowan & Wurdack 
30194. Borivar: Cerro Guaiquinima, Rio Paragua, at 1500 meters 
altitude, occasional in open savanna on precipitous slope below west 
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