THE FLORA OF THE NORTHERN TERRITORY. 71 



Perianth spirally twisted over the ovary, afterflowering at length deciduous. 

 Capsule, 3-valved. Filaments glabrous. 



Anthers 6 or 3, the cells opening longitudinally, but the outer 

 valve produced beyond the inner. Inner perianth-segments 

 fringed, enclosing the inner stamens in the bud. Umbels 

 usually 2 or more- flowered. — 2. Thysanotus. 

 Anthers 6, free, opening in slits. — 4. Csesia. 

 Nutlets 1-seeded, indehiscent. Anthers 6, opening in slits. — 5. Cory- 

 notheca. 

 Perianth not twisted, pers'stent round the fruit, unchanged or withering. 

 Flowers loosely racemose, cymose, or paniculate. Anthers 6, opening 



in slits. — 3. Chlorophytum. 

 Flowers numerous, in umbels, with numerous scarious imbricate 

 bracts. — . Sowerbaea. 



Tribe VI. Perianth small, usually dry, scarious, or hyaline, at least in the 

 females, rarely almost petal-Uke. Anthers versatile, attached at the back 

 between the basal lobes. Ovary 3-ceUed, with one laterally attached ovule in 

 each cell . — 8 . Lomandra . 



1. ^'HIGENIA, KuNTH. 



1 . /. indica, Kunth. — Arnh -m N. Bay and Islands of the Coast, R. Brown ; 

 Sea Range, F. v. Mueller. 



2. THYSANOTUS, R. Br. 



Stock densely tufted, with numerous radical leaves. No tubers. 



Umbels single. — 1. T. chrysantherus. 



Stock usually tufted, with several radical leaves often rather long. Roots 

 often tuberous. Scape paniculate at the end, with several few- flowered 

 umbels. — 2. T. tuberosus. 



1 . T. chrysantherus, F. v. M. — Foot of M'Adam Range, F. v. Mueller ; 

 Port Essington, Armstrong. 



2. T. tuberosus, R. Br. — ^Islands off the N. Coast (Arnhem's Land), 

 R. Brown ; Arnhem's Land, M'Kinlay ; Port Essington, Armstrong. 



Fringe Violet. 



3. CHLOROPHYTUM, Ker. 



1 . C. laxum, R. Br. — Arnhem S. Bay, R Brown ; Sea Range, F. v. 

 Mueller. 



4. C^SIA, R. Br. 



Perianth-segnients 3 to 4 lines long. Leaves rather broad, not surrounded 

 by filaments. — 2. C. vittata. 



Perianth-segments under 3 hnes long. Leaves very narrow, surrounded 

 at the base by long filaments, the remains of old sheaths. — 1. C. setifera. 



' 1. C. setifera. Baker. — ^Port Darwin, Schultz (No. 638). 



2. C. vittata, R. Br. ( Var. chlwardha, Benth). — Sturt's Creek, F. v, 

 Mueller. 



5. CORYNOTHECA., F. v. M. 



L C. lateriflora, F. v. M. — Islands of the Gulf of Carpentaria, R. Brown ; 

 Shores of the Gulf, F. v. Mueller ; Curlew River, N.W. Coast, A. Cunningham. 



