PLANTS OF SUMATRA 
Sapotaceae? 
Tigapuluh Mts . , Riau Province , 10 km SW of 
Talanglakat on Rengat-Jambi Rd. , Bukit 
Karampal area. 0°48'S; 102°31'E. Ridges in 
primary forest. 
Tree 35 m x 70 cm; bark brown fine 
longitudinal cracks; under-bark c/cm thick 
granular, orange; watery sap; fruit pale 
green with white latex. 
John S. Burley 
2050 20 November, 1988 
HARVARD UNIVERSITY HERBARIA 
HERBARIUM BOGORIENSE 
PLANTS OF SUMATRA 
Simaroubaceae 
Eurycoma longifolia Jack. 
Tigapulu Mts . , Riau Province , 5 km W of 
Talanglakat on Rengat-Jambi Road, Bukit 
Karampal area. 102°32'E, 0°46'S. Alt.: c. 100 
m. Along logging road, open places, common. 
Small single stemmed treelet c. 3m tall; 3 cm 
dia. ; rachis reddish brown; flower bud green; 
fruit dark red. 
J. S. Burley, Tukirin et al . 
1476 14 November, 1988 
HARVARD UNIVERSITY HERBARIA 
HERBARIUM BOGORIENSE 
PLANTS OF SUMATRA 
Annonaceae 
Popowia pisocarpa (Bl.) Endl . 
Tigapulu Mts . , Riau Province , 5 km W of 
Talanglakat on Rengat-Jambi Road, Bukit 
Karampal area. 102°32'E, 0°46'S. Alt.: c. 100 
m. Primary forest near logging road. 
Tree c. 12 cm tall; 10 cm dia. ; freely branched 
at c . 8 m tall; bark brownish black; young leaf 
pink; young fruit green. 
J. S. Burley, Tukirin et al . 
1497 15 November, 1988 
HARVARD UNIVERSITY HERBARIA 
HERBARIUM BOGORIENSE 
PLANTS OF SUMATRA 
Gonystylaceae 
Gony stylus brunnescens ? Airy Shaw. 
Tigapulu Mts . , Riau Province , 5 km W of 
Talanglakat on Rengat-Jambi Road, Bukit 
Karampal area. 102°32'E, 0°46'S. Alt.: c. 
100 m. Primary forest near logging road. 
Tree c. 20 m tall, 27 cm dia.; freely 
branched at c. 12 m tall; outer bark reddish 
brown, coarse, longitudinal cracks; inner 
bark pale brown, 10 mm thick; fruit greyish 
brown, 3.4 cm dia. Local Name: Topisan. 
J. S. Burley, Tukirin et al . 
1503 16 November, 1988 
HARVARD UNIVERSITY HERBARIA 
HERBARIUM BOGORIENSE 
PLANTS OF SUMATRA 
Euphorbiaceae 
Aporosa symplocoides (Hk-f.) Gage. 
Tigapulu Mts . , Riau Province , 5 km W of 
Talanglakat on Rengat-Jambi Road, Bukit 
Karampal area. 102°32'E, 0°46'S. Alt.: c. 
100 m. Primary forest near logging road. 
Small tree c. 6 m tall, 5 cm dia.; freely 
branched c. 4 cm; outer bark light brown, 
flaky; inner bark yellowish, very thin; 
young leaf pale violet; fruit orange. 
J. S. Burley, Tukirin et al . 
1505 16 November, 1988 
HARVARD UNIVERSITY HERBARIA 
HERBARIUM BOGORIENSE 
