Hydrocotyle.~\ LXX. UMBELLIFER^. (C. B. Clarke.) 667 



SERIES III. Diplpzygiee. Umbels compound. Secondary ridges of the 

 fruit prominent, primary equally or less prominent or inconspicuous. 



* Fruit glabrous. 



Fruit globose. Bracts 34.* CORIANDRUM. 



Fruit narrowly oblong. Brapts slender, simple 34.** CTTMINUM. 



** Fruit hirsute or setose. 



Bracts pinnate. Seed plane on the inner face ...... 35. DATTCTTS. 



Bracts linear, or 0. Seed grooved on the inner face . . . .36. CAUCALIS. 



Bracts linear-lanceolate, membranous . . 37. PSAMMOGETON. 



1. HYDROCOTYLE, Linn. 



Prostrate herbs, rooting at the nodes. Leaves (in the Indian species) cordate 

 or hastate, not peltate, round or 5-9-gonal, subentire or palmately lobed, pal- 

 mate-nerved, long-petioled ; stipules small, scarious. Umbels (in the Indian 

 species) simple, small; bracts small or 0; flowers white, sometimes uni- 

 sexual. Calyx-teeth or minute. Petals entire, valvate or imbricate. Fruit 

 laterally compressed, commissure narrow ; carpels laterally compressed or sub- 

 pentagonal ; lateral primary ridges concealed within the commissure, or distant 

 therefrom and prominent ; vittse 0, or most slender, obscure ; carpophore 0. 

 Seed laterally compressed. DISTRIB. Species 70 ; in wet places in tropical and 

 temperate regions, more numerous in the Southern Hemisphere. 



SECTION I. Eu-Hydrocotyle. Petals acute, valvate. Secondary ridges 

 0. Pericarp not thickened. 



1. K. javanica, Thunb. Dissert, ii. 415, t. 3; leaves 1-3 in. diam. cor- 

 date crenate, subentire or lobed to the middle, petiole laxly pubescent, peduncles 

 long upper often clustered, fruit much compressed not pentagonal. DC. Prodr. 

 iv. 67 ; Miq. Fl. Ind. Bat. \. pt. i. 734 ; Kurz in Journ. As. Soc. 1877, pt. ii. 

 113. H. hispida, Don Prodr. 183. H. nepalensis, Hook. Exot. F\ t. 30 ; 



Wall. Cat. 561 ; DC. 1. c. 65 ; Miq. I c. 735. H. zeylanica, DC. I c. 67 ; W. $ 

 A. Prodr. 366 ; Miq. I. c. 734. II. hirsuta, Blume Bijd. 884. H. polycephala, 



W. 8f A. Prodr. 366; Wight Ic. t. 1003. H. hirta, It. Br. Var. acutttoba, F. 

 Muell. ; Benth. Fl. Austral, iii. 340. H. Heyneana, Wall. Cat. 563. H. stri- 

 gosa, Ham. in Wall. Cat. 7219. 



HIMALAYA ; from KASHMIR to BHOTAN, alt. 2000-8000 ft. ; KHASIA MTS., alt. 

 2000-6000 ft., common. Mts. of MALABAR and CEYLON, common. PEGU and TE- 

 NASSERIM, alt. 2000-5000 ft. DISTRIB. Malaya to the Philippines and Australia, 

 Mozambique. 



Leaves 1-3 in. diam., pubescent or glabrous. Peduncles ^-2 in., lower solitary, 

 leaf-opposed. Umbels many-flowered ; bracts minute lanceolate scales among 

 the pedicels ; pedicels 0-i in., glabrous. Fruit i in., orbicular or subquadrate, 

 reticulate-rugose or smooth (sometimes deformed, enlarged, obovoid, corky); 

 lateral primary ridges commissural, intermediate faint or ; pericarp hard, thin. 

 Fruits exceedingly uniform even in minute characters from the Himalaya to Ceylon. 

 Thunberg describes H. javanica as glabrous, but all the specimens so named from Java 

 have at least the petioles and peduncles pubescent and are identical with the Indian. 

 H. hirsuta, Blume, is a form with fulvous pubescence abundant in the Eastern Hima- 

 laya. H. polycephala, Wight 111. t. 117, fig. 1, represents the carpels as subpenta- 

 gonal and little compressed laterally, and perhaps was taken from H. rotundifolia. 



