The closest ally of Conomorpha lthophyta seems to be 
C. magnoliifola Mez, a species of British Guiana and 
Surinam. The former can be distinguished from the latter 
at once by its very compact and densely many-flowered 
spikes (in contrast to loosely fewer-flowered racemes). 
There are also minor floral differences, such as the tri- 
angular lobes of the calyx and the lageniform ovary in 
Conomorpha lithophyta (in contrast to ovate lobes and a 
subglobose ovary in C. magnoliufolia). 
Like Conomorpha magnolufola in Surinam, this new 
species is reported to be employed as a minor fish-poison. 
The Kubeos living along the uppermost course of the 
Rio Kuduyari sometimes crush the leaves of Conomorpha 
lithophyta for use in fishing in stagnant lagoons. ‘The 
Kubeo name of the tree is dd-pee-ha-hee, meaning savan- 
nah (dd) fish-poison (pee-ha-hee). 
CotomBia: Comisaria del Vaupés, Rio Kuduyari, Savannah of Yap- 
oboda. *"Tree 10 feet tall. Flowers fragrant, yellow. Inflorescence 
frequented by bees.”*’ September 4, 1956. Arthur F. Barclay & Rich- 
ard Evans Schultes 560 (Tyre in Herb. Gray ).—Same locality and 
date, Barclay & Schultes 543,—Same locality and date, Barclay & 
Schultes 566. 
APOCYNACEAE 
Dr. Robert Woodson has contributed the descriptions 
and discussions of the apocynaceous plants which are dis- 
cussed in the following lines. 
Mandevilla annulariifolia JWoodson sp. nov. 
Frutex volubilis; ramis crassis vel crassiusculis Juven- 
tate minute papillatis mox cortice valde anguloso satur- 
ate rubro-vernicoso tectis, ramulis saepe verticillatis. 
Folia verticillata saepissime quaternata subsessilia line- 
aria 2-5 em. longa, 1-4 mim. lata, firmiter membranacea 
glabra nervo medio supra distante glanduligero, Inflores- 
centia terminalis vel subterminalis pauciflora: pedunculo 
[ 168 | 
