LEAFLETS OF PHILIPPINE BOTANY 
EDITED BY A. D. E. ELMER, A. M. 
Vol. Il. Manila, P. L, March 20, 1909. Art. 33. 
THE GENUS HYDROCOTYLE 
BY 
*, 
A. D. E. ELMER. 
HYDROCOTYLE Linn. 
Creeping postrate herbs, rooting at the nodes. Leaves 
entire or divided, or cuneate at the base and divided, cordate to 
hastate or peltate; small stipules scarious, irregularly toothed; 
petiole usually slender. Umbels smalls, simple or sometimes 
verticillate below the terminal one, usually substended by small 
bracts; flowers creamy white or rarely purplish, minute ac- 
casionally unisexual; calyx teeth none or minute; petals acute, 
entire, valvate or imbricate; disk flat, with a cup shaped rim; 
fruit laterally compressed; the lateral ribs concealed in the com- 
missure, the dorsal one prominent, the secondary ribs usually 
inconspicuous. 
Of the 70 tropical and subtropical species, only 5 oc- 
eur in the Philippines. 
Key to the Philippine species of Hydrocotyle. 
Petioles and under surface of leaves glabrous; transverse 
reticulations prominent. : 
ee 1. H. asiatica. 
