University of Illinois at Chicago 
PLANTS OF IRIAN JAY A 
APOCYNACEAE 
Det. By: 
Field Char: Uncommon understory tree 10 m tall, 
bole straight, 10 cm dbh; bark gray, smooth; 
calyx whitish, corolla tube pale green, 
segments white, twisted; latex white. 
Locality: Irian Jaya: Sarmi Province, slopes of 
small mountain ridge rising from coastal plain, 
"Gunung Top", west of Sungai Tor, east of 
Sungai Waske, vicinity of Sewan village near 
Titfe stream. 
Habitat: Primary lowland forest, canopy 10-60 m 
tall. Associates diverse, include 
Sterculia, Knema, Polyalthia, 
Zizyphus, Pometia, etc. 
10-100 m, 2° 4’S X 138°46’E 
McDonald & Ismail 3690, May 23, 1993 
This is a voucher specimen for 
anticancer and anti-AIDS screening 
NCI Sample Number(s): U44Z4945-L, U44Z4946-M 
U44Z4947-N. 
Collected under the sponsorship of: U.S. National Cancer 
Institute, University of Illinois at Chicago, Arnold 
Arboretum (Harvard University), Field Museum of 
Natural History and BO/LIPI. 
