70 AUSTRALIAN PLANTS. 



flowered, nearly capitate ; fruits didymo-obcordate, much compressed, 

 Lroad-winged, even, with a rib on each side of the mericarps. 



Hab. From Mount Disappointment to the Ovens Eiver, on rivulets. 



Allied both to H, pedimcularis and pleheja. Sometimes viviparous. 



87. Hydrocotyle geraniifolia^ Y. Muell. ; subglabrous ; stems long, 

 diffused, lax, partially rootiug ; leaves three- to five-parted, the lower 

 ones peltate ; segments of all divaricate, ovate or linear-lanceolate, 

 grossly and unequally serrate or lobed, gradually narrowed into the 

 apex, cuneate at the base ; stipules membranaceous, fringed ; petioles 

 shorter than the thread-like, sometimes divided, peduncles ; umbels 

 many-flowered ; pedicels capillary, much longer than the flowers \ fruits 

 kidney-shaped, didymous, compressed ; mericarps winged at the back, 



with a rib on each side, and a semicordate excavation at the commis- 

 sura. 



Hab. In moist valleys of Mount Disappointment, of the Dandenong 

 Ranges, and thence to the western part of Gripps' Land. 



Its systematic position is near H. quinqueloba, 



88. Pozoa fi'agosea^ P. Muell. {Fragosa hydrocotylea^ F. Mueller, 

 coll.) 5 glabrous; rhizome thick, creeping, with numerous long fibres; 

 stems very short, prostrate ; leaves herbaceous, long-petiolate, orbicu- 

 lar-reniform, net-veined, divided scarcely to the middle into five to nine 

 crenulate lobes ; stipules broad, membranous, torn ; umbels sessile on 

 the base of the petiole or pedunculate, capitate, generally many- 

 flowered ; leaflets of the involucre five to eight, connate, lanceolate, 

 with a few setaceous lobes ; teeth of the calyx deltoid-ovate, somewhat 

 acuminate, nearly acute; petals greenish; carpels ovate, compressed 

 on the back, with five hardly prominent ribs, strongly contracted at 

 the axis. 



Hab. Under the shade of rocks on the highest tops of the Munyang 

 Mountains, but of rare occurrence; 6000 feet. 



I assigned to this plant a place in the genus Pozoa^ on account of 

 the great resemblance with Pozoa reniformis^ P, Ranunculus^ and P. 

 trifoliatay but cannot snppress my opinion that Pozoa and Azorelld 

 rank only as groups of one large and polymorphous genus, namely, 



Pragosa. 



89. Dimetopia (Sect. Eriosciadium) eriocarpa, E. Muell. ; dwarf, 

 downy ; leaflets of the involucre as long as the rays of the fruit-bearing 

 umbel, narrow-lanceolate or linear ; mericarps equal to each other, on 



