THE FLORA OF THE NORTHERN TERRITORY. 197 



2. P concreta, F. v. M. — Camden Harbour, N.W. Coast (Herb., F. v. 

 Mueller). 



3. P. Holroydi, F. v. M.- — Gorges of the Hammersley Range, N.W. 

 Coast, C. Harper. 



4. P. microcephala, R. Br. — Hot Springs, DaUiousie Station, 90 miles 

 N. of Oodnadatta, G. F. Hill (No. 5), 14/2/1910. 



5. P. punicea, R. Br. — Amhem N., and S. Bays, R. Brown ; Arnhem 

 Land, M'Kinlay ; Sim's Island, A. Cunningham. 



Var. breviloba, F. v. 21. — East Alligator River, P. Cahill, 1914. Poison 

 Plant (Collector). 



P. sanguinea, F. v. M. ; P Forrestiana, F. v. M. ; P. simplex, F. v. 31. ; 

 (in Nat. Herb. Census) ; and P. Husseyana, F. v. M. (in Vict. Nat. XI., No. 

 122, 1894) ; recorded from North AustraUa. 



LYTHRACE.aE. 



Annual or perennial herbs, very rarely becoming woody at the base. 



Calyx short, membranous, the ribs inconspicuous or only as many 

 as primary teeth ; accessory teeth minute or none. Petals very 

 small or none. — 1. Ammania. 

 Calyx narrow, with twice as many ribs as primary teeth ; accessory 

 teeth prominent. Petals usually conspicuous. — 2. Lythrum. 



Shrubs or trees. Stamens twice as many as petals. 



Calyx-lobes 6, with accessory teeth. Capsule enclosed in 'the calyx. 



Maritime shrub, with sohtary flowers in the upper axils. — 



3. Pemphis. 

 Calyx-lobes 4, without accessory t«eth. Capsule exserted. Flowers 



ia leafy panicles. — 4. Lawsonia. 



1. AjMi\L\NNIA. Linn. 



(Rotdla, Linn. ; Ameletia, D.C.) 



Flowers sessile, solitary in the axils. Capsule opening m as many valves 

 as cells. 



Leaves narrow in whorls of 3 to 8. Capsule 3 or4-valved. — .3. A; 



Rotala. 

 Leaves ovate-lanceolate or oblong, opposite or rarely in threes. 



Capsule 3 or 4-valved. — 4. A. pentandra. 

 Leaves orbicular, opposite. Capsule 2-valved. — 2. A. diandra. 



Flowers pedicellate, solitary or in cymes. Capsule bursting irregularly or 

 transversely. 



Flowers sohtary, on long fihform pedicels. Leaves oblong-hnear. 



Petals present. — 1. A. crinipes. 

 Flowers 1 to 3, on short axillary peduncles. Leaves broadly oblong, 



petiolate. No petals. — 6. A. tri flora. 

 Flowers several in axillary cymes. — 3. A. indica. 



1. A. crinipes, F. v. M. — About pools and lagoons, between the Victoria 

 and Fitzmaurice Rivers, F. v. MueUer. 



2. A. diandra, F. v. M. — ^Around the lagoons and moist banks of the 

 Upper Victoria and Fitzmaurice Rivers, F. v. Mueller. 



