102 THE FLORA OF THE NORTHERN TERRITORY. 



6. GOMPHRENA, Linn. 1737. 



(Bragantia, Vaud., 1771 ; Chnoanthus, Phil., 1862 ; Coluppa, Adans., 

 1763 ; Ninanga, Bafin, 1863 ; Schultesia, Schrad., 1831 ; Wadapus, Rafin., 

 1836 ; Xerosiphon, Turcz., 1843 ; Philoxerus.) 



Staminal tube longer than the ovary. Spikes globular or ovoid, usually 

 large. Filaments flat. Leaves linear. 



Staminal tube with filiform teeth between the filaments. Spikes globular. 

 Perianth-segments acute. Annual. 4. G. canescens. 



Staminal tube with flat bilobed segments. Perianth-segments blunt. — 

 10. G. involucrata. 



Staminal tube without teeth or lobes between the filaments. 



Annual of 1 to 2 ft. Spikes at length ovoid or oblong. Perianth- 

 segments obtuse. — 8. G. flaccida. 

 Aimual under 1 ft. Spikes hemispherical or globular. Perianth- 

 segments acute.-^l. G. affinis. 

 Perennial under 1 ft. Spikes hemispherical or globular. Perianth- 

 segments rather obtuse. — 9. G. humihs. 

 Staminal tube shorter than the ovary. Spikes rarely above ^ in. diameter. 

 Spikes hemispherical or globular. Perianth very woolly outside 

 below the middle. 



Staminal tube with teeth or lobes between the filaments. 



Leaves linear. Bracts much shorter than the bracteoles. — 3. 



G. Brownii. 

 Leaves lanceolate. Bracts nearly as long as the bracteoles. 



— 2. G. brachystyhs. 

 Staminal tube without teeth or lobes between the filaments. 



Leaves broadly lanceolate. Filaments with a minute tooth 



at the top on each side. 11. G. leptoclada. 

 Leaves narrow-lanceolate. Filaments filiform at the top 



without lateral teeth. 



Spikes ^-in. diameter or more. Perianth woolly to 

 above the middle. Bracteoles shorter than the 

 perianth. — 12. G. Maitlandi. 

 Spikes 4 to 5 lines diameter. Perianth woolly only 

 below the middle. Bracteoles longer than the 

 perianth. — 14. G. pusilla. 

 Leaves filiform. Spikes and perianth of G. pusilla. — 

 15. G. tenella. 

 Spikes ovoid or oblong-cylindrical. Perianth woolly below the middle. 

 Spikes 5 lines diameter. Leaves all linear. Filaments broad 



and 2 or 3 toothed at the end. — 6. G. conica. 

 Spikes 3 or 4 lines diameter, densely crowded with broadly 

 lanceolate floral leaves. Filaments tapering at the end. — 5. 

 G. conferta. 

 Spikes at length narrow-cyhndrical. Perianth small, quite glabrous. 

 Leaves hairy. Lanceolate or oblong. — 7. G. diffusa. 

 Leaves glabrous or nearly so. Narrow linear. — 13. G. parvi flora. 



1. G. affinis, F. v. M. — Upper Victoria River, F. v. Mueller. 



2. G. brachyslylis, F. v. M. — Hooker's Creek, F. v. Mueller. 



3. G. Brownii, Moq. (G. kmata, B. Br.). — Islands of the Gulf of Car- 

 pentaria, R. Brown. 



