214 THE FLORA OF THE NOETHERN TERRITORY. 



North of 15°, W. S. Campbell, 5/9/1911. 



Recorded. Melville Island, I'raser; McAdam Range and Arnhem's 

 Land, P. t. Mueller; Port Essington, Armstrong. 



0. perangusta, P. v. M. ; recorded from Worth Australia in N'at. Herb. 

 Census. 



3. MEMECYLON", Linn. 



1. M. umbellatum, Burm. — ^North-west Coast, A. Cunningham. 



ONAGRACEAE. 



Stamens twice as many as calyx-lobes or petals. — 1. Jussieua. 

 Stamens of the same number as calyx-lobes or petals. — 2. Ludwigia. 



1. JUSSIEUA, Linn. 1737. 



(Corynostigma, PresL, 1850; Cubospermum, Lour, 1790; Oldenlandia, 

 R. Br., 1756.). Clove-strip. 



1. J. suffruticosa, Linn. — Edith Creek, Gibnith and Spencer, July- 

 August, 191 L 



Recorded. Victoria River and McAdam Range, F. v. Mueller ; Strang- 

 ways River, McDouaU Stuart ; Albert River, Henne. 



2. LUDWIGIA, Linn. 



1. L. parviflora, Roxh. — Victoria River, F. v. MueUer ; Port Essiagton, 

 Armstrong. 



HALOREHAGIDACEAE. 



Petals, at least in the males, induplicate, keeled. Fruit a nut-like or 

 rarely spongy, undivided drupe.— 1. Haloragis. 



Petals in the males imbricate. Fruit separable into 2 or 4 nut-like 

 carpels. Aquatic or mud-phiiils. — 2. Myriophyllum. 



1. HALORAGIS, Fokst. 

 (Cercodia, Murr. ; Gonocarpus, Thunb.) Raspwort. 



Western species. Flowers minute. Racemes paniculate, glabrous or with 

 a few scattered hairs. Leaves oblong or cuneate, nearly entire. Racemes 

 filiform, paniculate. Bracis minute or none. — 2. H. triehostachya. 



Eastern species. Scabrous or hirsute. Leaves broadly toothed or crenate. 

 Leaves oblong, often 1 in. long. Fruit small, narrow. Bracts minute. — 

 1. H. acanthocarpa. 



1. H. acanthocarpa, Brogn. — ^Victoria River, P. v. Mueller ; Port Essing- 

 ton, Armstrong ; islands of the Gulf of Carpentaria, R. Brown ; Sims Island, 

 A. Cunningham ; Gould Island, McGiUivray. 



2. H. triehostachya, Benth. — ^N. A. Drummond, N. 205. 



H; heterophylla, Brogn. ; H. Gossei, F. v. M. ; recorded from North Aus- 

 tralia in National Herbarium Census. 



Ceratophyllum demersum, Linn. ; recorded from North Australia in 

 Nat. Herb. Census. 



