Annonaceae 
PLANTS OF SUMATRA 
PLANTS OF SUMATRA 
Sapotaceae 
Pavena maingayi ? Clarke 
Tigapuluh Mts . , Riau Province , 15 km SW of 
Talanglakat on Rengat-Jambi Rd. , vicinity of 
Sungai Sesirih. 0°48'S, 102°31'E. Alt.: c. 
200 m. Primary forest on hill slope. 
Small tree c. 5m tall, 4.5 cm dia. ; freely 
branched at c. 1.5 m tall; bark brown, 1 mm 
thick; leaf glaucous underneath; flower 
yellow, fragrant. 
J. S. Burley, Tukirin et al . 
1671 24 November, 1988 
HARVARD UNIVERSITY HERBARIA 
HERBARIUM BOGORIENSE 
PLANTS OF SUMATRA 
Gnetaceae 
Gnetum cuspidatum Bl . 
Tigapuluh Mts., Riau Province, 15 km SW of 
Talanglakat on Rengat-Jambi Rd. , vicinity of 
Sungai Sesirih. 0°48'S, 102°31'E. Alt.: c. 
200 m. Primary forest on hill slope. 
Woody liana c. 8m tall, 0.9 mm dia.; dark 
brown bark; fruit pinkish, 1.2 mm dia. 
J. S. Burley, Tukirin et al . 
1672 24 November, 1988 
HARVARD UNIVERSITY HERBARIA 
HERBARIUM BOGORIENSE 
PLANTS OF SUMATRA 
Rubiaceae 
Psvchotria robusta Bl . 
Tigapuluh Mts., Riau Province, 15 km SW of 
Talanglakat on Rengat-Jambi Rd. , vicinity of 
Sungai Sesirih. 0°48'S, 102°31'E. Alt.: c. 
200 m. Primary forest on hill slope. 
Undershrub c. 2m tall, 3 cm dia.; sparsely 
branched; fruit pale green. 
J. S. Burley, Tukirin et al . 
1673 24 November, 1988 
HARVARD UNIVERSITY HERBARIA 
HERBARIUM BOGORIENSE 
Tigapuluh Mts . , Riau Province , 15 km SW of 
Talanglakat on Rengat-Jambi Rd. , vicinity of 
Sungai Sesirih. 0°48'S, 102°31'E. Alt.: c. 
200 m. Primary forest on hill slope. 
Tree c. 20 m tall, 26 cm dia.; buttress 0.5 
m tall ; freely branched at c . 10 m tall ; 
outer bark brown, rugose; inner bark brown; 
white latex; leaf shining brown underneath; 
young fruit green with brown indumentum. 
Local name : Sungkup . 
J. S. Burley, Tukirin et al . 
1674 24 November, 1988 
HARVARD UNIVERSITY HERBARIA 
HERBARIUM BOGORIENSE 
PLANTS OF SUMATRA 
Rubiaceae 
Psychotria laxiflora Bl . 
Tigapuluh Mts., Riau Province, 15 km SW of 
Talanglakat on Rengat-Jambi Rd. , vicinity of 
Sungai Sesirih. 0°48'S, 102°31'E. Alt.: c. 
200 m. Primary forest on hill slope. 
Climber c. 3 m tall; 0.5 cm dia.; leaf 
glaucous green; flower bud and petal glaucous 
green; stamen bright yellow at the base; 
anther white . 
J. S. Burley, Tukirin et al . 
1675 24 November, 1988 
HARVARD UNIVERSITY HERBARIA 
HERBARIUM BOGORIENSE 
PLANTS OF SUMATRA 
Annonaceae 
Tigapuluh Mts., Riau Province, 15 km SW of 
Talanglakat on Rengat-Jambi Rd. , vicinity of 
Sungai Sesirih. 0°48'S, 102°31'E. Alt.: c. 
200 m. Primary forest on hill slope. 
Shrub c. 4 ra tall, 3.5 cm dia.; branched at 
the top; cauliflorous ; calyx dark green; 
petal greenish-yellow. 
J. S. Burley, Tukirin et al . 
1676 24 November, 1988 
HARVARD UNIVERSITY HEEIBARIA 
HERBARIUM BOGORIENSE 
