1x,c,6 Gates: Swamp Vegetation in Hot Springs Areas 518 
Species in the parang association in the swamp area. 
DOMINANT SPECIES. 
Acacia farnesiana (L.) Willd. Leea aculeata Blanco. 
Callicarpa blancoi Rolfe. Macaranga tanarius Muell.-Arg. 
Erythrina indica Lam. Phyllanthus reticulatus Poir. 
Ficus pseudopalma Blanco. Pithecolobium dulce Benth. 
Ficus ulmifolia Lam. Premna odorata Blanco. 
Ficus spp. Psidium guajava Linn. 
Gliricidia sepium (Jacq.) Steud. Semecarpus cuneiformis Blanco. 
Glochidion sp. Tabernaemontana pandacaqui Poir. 
HERBACEOUS SECONDARY SPECIES. 
Abutilon indicum G. Don. Mimosa pudica Linn. 
Achyranthes aspera Linn. Oplismenus undulatifolius Beauv. 
Ageratum conyzoides Linn. Panicum (Echinochloa) colonum Linn. 
Amaranthus spinosus Linn. Ricinus communis Linn. 
Barleria prionitis Linn. Scleria scrobiculata Nees. 
Commelina nudiflora Linn. Solanum nigrum Linn. 
Dactyloctenium aegyptium Willd. Sphaeranthus africanus Linn. 
Eleusine indica (Linn.) Gaertn. Synedrella nodiflora Gaertn. 
Heliotropium indicum Linn. Triumfetta bartramia Linn. 
Hibiscus surratensis Linn. Urena lobata Linn. 
RELIC SPECIES. 
Acrostichum aureum Linn. . Typha angustifolia javanica Schindl. 
Bacopa monniera Wettst. (Rare.) 
Phragmites vulgaris Trin. 
VINES AND LIANAS. 
Abrus precatorius Linn. Melothria mucronata Cogn. 
Cissus trifolia K. Sch. Merremia gemella Hallier f. 
Hewittia sublobata O. Ktze. Merremia hastata Hallier f. 
Ipomoea cairica Sweet. Merremia vitifolia Hallier f. 
Ipomoea obscura Lindl. Sida javensis Cav. 
Ipomoea sp. Tournefortia sarmentosa Lam. 
Jacquemontia paniculata Hallier f. 
THE ERYTHRINA-BARRINGTONIA ASSOCIATION 
The highest vegetation of the swamp, as such, is an association 
of trees, dominated by Lrythrina fusca Lour. and Barringtonia 
luzonensis Rolfe. In this area these trees are found in the Tarlac 
swamp near the entrance of the Casilihan River. While the 
association has been seriously interfered with in this region, it 
appears that normally this association consists of well-spaced 
trees growing in water. Small trees and shrubs may be present 
in openings. Vines and lianas are generally very abundant. 
At the margin, vines are particularly conspicuous. The transi- 
tion from the marsh to the swamp-tree association is abrupt. 
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OS RE Nae Salta eo! 
