15 mm. longo; basi obtusa vel acuta; costa prominenta, 
venis lateralibus parallelis, prominulis 1-2 mm. distanti- 
bus, nervo collectivo a margine ca. 1 mm. remoto; flora 
solitari terminale exterior] rubro sursum maculato; brac- 
teis paucis aggregatis acute triangularibus vel ovato- 
triangularibus 2-5 mm. longis: pedunculo crasso turbin- 
ato 5-10 mm. longo; sepalis 5, imbricatis non-gradatis 
ovato-orbicularibus, 15-18 mm. latis, 15-20 mm. longis, 
subseariosis; petalis 8-9 cm. longis, ca. 2 cm. latis, 
lineari-oblanceolatis, apice acutiusculo; staminibus 50— 
60 in 5 phalangibus, quisque cum 10-12 staminibus; fil- 
amentis ad basim ca. 2 cm. in ligulo connatis, partis 
liberis planis tenuis, ca. 0.6-0.7 mm. latis, 2—2.5 cm. 
longis; antheris introrsis linearibus 2—2.5 cm. longis, 
0.6—-0.7 mm. latis, apice saepe recurvato, connectivo ali- 
quantum alato; pistillo longi-stipitato, ovario 5-loculari, 
ovulis numerosis, stylis brevi-cornutis, 5; fructu ignoto. 
Cotomsia: Comisaria del Amazonas, Rio Ricapuy4, tributary of Rio 
Apaporis below mouth of Rio Piraparand. September 25-26, 1952. 
Richard Evans Schultes & Isidoro Cabrera 17638 (Type in Herb. N.Y. 
Bot. Gard. ).—Comisarias del Amazonas and Vaupés, Rio Apaporis at 
mouth of Rio Piraparand. “‘“Tree 6 m. high. Flowers red outside, 
greenish at base and red-spotted above; calyx green. September 25, 
1952. Schultes & Cabrera 17619. 
MELASTOMACEAE 
The following studies in the Melastomaceae have been 
contributed by Dr. John Wurdack. 
Centronia vaupesana Wurdack sp. nov. 
Centroniae reticulatae Triana affinis sed cum foliorum 
laminis supra non reticulato-venosis indistincte 5-nerviis, 
ovario apice glabro. Rami robusti indistinete suleati cum 
petiolis pedunculoque primum rufo-furfuracei mox glab- 
rati. Petioli 2-8 em. longi; lamina 11-17 X4-7.5 cm. 
ovata apice hebeti-acuta paulo acuminata) basi rotun- 
[ 160 ] 
