MACLOSKIE I UMBELLIFERyE. 623 



4. HYDROCOTYLE BONPLANDI Rich. 



Hirsute. Leaves reniform (not peltate), 9-nerved, bicrenate. Peduncles 

 25 mm. long, equalling the petioles. Umbel io-i2-flowered, the flowers 

 pediceled. 



(Chili) ; Patagon., by Rio Negro and Rio Sta. Cruz. 



H. BONPLANDI CHILENSIS. 



Umbels denser, subsessile. Leaves y-nerved, y-lobed ; petioles 35 mm. 

 (Chili) ; Patagon., Rivers Negro and Sta. Cruz. 



5. H. MODESTA Cham, and Schl. 



Leaves peltate, very long-petioled (7-30 cm.) subreniform-orbicular, 

 glabrous, Q-nerved, petioles and young stems pilose. Peduncles short 

 (6-25 mm.), many-rayed. Fruit very small, emarginate at both ends. 

 (Montevideo) ; N. Patagon., by Rio Negro. 



6. H. RANUNCULOIDES Linn. f. 



Stout, glabrous. Stem floating or creeping near the shore. Leaves 

 orbiculate-reniform (not peltate), 5-nerved, somewhat 5-lobed ; the lobes 

 obtuse, subcrenate, mid-lobe longest and narrowest. Peduncles shorter 

 than the petioles. Umbel 5-i2-flowered, the flowers pediceled. Fruit 

 broad-orbicular. 



(Mediterr. Region ; N. Amer. ; by Mex. to S. Amer.) ; N. Patagon., by 

 Rio Negro, S. Patagon., by Rio Sta. Cruz. 



7. H. UMBELLATA Linn. 



Glabrous, subterranean branches tuberiferous. Leaves peltate, orbicu- 

 lar, basi-emarginate, bicrenate, about i i-12-nerved. Scape shorter than 

 the petioles. Umbel 2O-3O-flowered ; the flowers petioled. Fruit broader 

 than long, notched at both ends. 



(S. Africa ; N. Amer. and W. Indies ; Mex. to S. Amer.) ; N. Patagon. 



2. BOWLESIA Ruiz & Pav. 



Stellate-hairy or glabrous herbs. Leaves alternate below, but mostly 

 opposite under the simple or irregularly compound umbels. Bracts small, 

 subulate or none. Calyx-teeth prominent. Petals entire, white or pur- 

 plish. Fruit constricted, with narrow commissure. Mericarps subtri- 

 angular, glochidiate-ciliate, the cilia united at base to form a wing. 



