70 G. King — Materials for a Flora of Ike Malayan Peninsula. [No. 
slieatbing at the base ; atiptileB 0. Flowers berraaplirodita or polyga- 
mous, in compound umbels (simple in HydrocotyU and Biipleurum) 
exterior of tbo umbel someHmes ra-dsaut; umbels with iavolucriform 
brflcta at the base of tbe geueral one and bracteoles at the base of the 
partial ones (umbellules). Galyx-tuhe adaate to tbe ovary, limb 0 or 
5-toothed. Petals 5, epigynoua, often unequal^ and with a median fold 
on the facot plane or emarginate or 2-lobed with the apex inflexed ; 
imbricated in bnd, in Hydrocotyle sometimes valvate. Stamens 5, epigy- 
nous. Ovary inferior, 2-celled, disc £-lobed ; styles 2» etigmas eapi- 
t€illafce; ovulea 1 in each cell, pendtibus. Fruit of 2 indehiscent 
dorsatly or laterally compressed carpels, separated by a eommisiure ; 
carpels each attached to and often pendulonfl from a slender often 
forked axis (carpophore), with 5 primary ridges (1 dorsal, 2 marginal 
and 2 intermediate) and often 4 secondary ones intercalated between 
these ; pericarp often traversed by oil-canals {vittBe) , Seed 1 in each 
carpel, pendulous, albumen cai*tilaginoua * embryo small, next the hitum, 
radicle superior.— D[STRi:ii. Species about 1,500, mainly in Europe^ 
North Af i-ica, West Centnil and North Asia i a few are North American, 
tropical, and natives of the Sou thorn Hemisphere, 
Creeping unanned herbs ... ... 1, ITtdbocoty&b, 
Breot BpiDonj! herlba ... ... ... 2. ERrNGiUM, 
1. Htdrocottle, Linn, 
Prostrate herbs, rooting at the nodes. Leaves (in the Indian 
species) cordate or hastate, not peltate, round or 5-9-gotial, subentire or 
palmately lobed, palmate-nerved, long-petioled ; stipnles small, scarious, 
Umhels (in the Indian species) simple, small ; bracts small or 0 ; flowers 
white, sometimes unisexual. Calyx-teeth 0 or minute. Fefah entire, 
yalvate or imbricate. Fruit laterally compressed, commissure narrow ; 
carpels laterally compressed or enb-pentagonal ; lateral primary ridges 
concealed within the commissure, or distant therefrom and prominent; 
vittm 0, or moat slender, obscure ; carpophore 0. Seed laterally com- 
pressed.— Distrjb. Species 70 \ in wet places in tropical and tempei'ate 
regions, more numerous in the Southern Hemisphere, 
Petalfi acute, valvate ; fruH with no sedondary ridges ; 
pericarp thin ... ... ... ... 1. H, javanica. 
Petals obtuse, imbricftte, fruit with prominent secondary 
ridges, the pericftrp thickened ... ... ... 2. H. asiatiai. 
1. HvDROOOTTLE JATANICA, Thunb. Disscrt. Hydrocot. n. 17, t. 2 • 
ed. Pers. 11, 415, t. 2. Leaves reniform, 5-6-lobed, the lobes irregularly 
crenate, sometimes sub*entir©, 1 to 3 in. broad. Fednncles long, slender, 
often clustered. Fetah acute, valvate, Frtdi much compressed, the 
