PLANTAE COLOMBIANAE XV 
PLANTAE NOVAE COLOMBIANAE ORIENTALIS DESCRIPTIONES 
BY 
RicHarp Evans ScHULTES 
Oovr continued investigation of recently collected Colom- 
bian plants, especially those from the northwesternmost 
part of the Amazon Valley, has brought to light several 
species hitherto apparently undescribed. Descriptions of 
these concepts are offered in the present paper. 
Gratefully I acknowledge the artistry of Mr. Johann 
Gumppenberg who has made the line-drawings published 
herein. My thanks are due also to the National Science 
Foundation for a grant which made possible the draw- 
ings and their publication. 
CYCLANTHACEAE 
Cyclanthus indivisus PR. Ll. Schultes sp. nov. 
Planta terrestris, acaulescens, usque ad 130 cm. alta. 
Petiolus 30-40 cm. longus vel brevior, leviter angulatus. 
Lamina tenuiter sed firme chartacea, concoloria, integra 
(non bifida), oblanceolata, 90-115 cm. longa, 10-15 cm. 
lata, apice acuminata, basi sensim acuminata, bicostata, 
robustis cum nervis principalibus stramineis, nervulis 
parallellibus plusminusve quattuorviginta. Inflorescen- 
tiae axis atropurpureus, teres, aliquid carnosus, 80-45 cm. 
longus, 0.6-10 mm. in diametro. Spathae quattuor, ex- 
teriores extus virides sed intus flavae, interiores utrinque 
flavae apicem versus rubrae. Spadix breviter et late cy- 
lindricus, 6-7 cm. longus, 25-45 mm. in diametro, ma- 
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