■20!) THE FIORA or THE NORTHERN TERRITORY. 



4. BRUGUIERA, Lam. 



Flowers above 1 in. long. Petals with several setes at the end. — 2. B. 

 Rheedii. 



Mowers under 1 in. long. Petals without setae at the end. — 1. B. 

 gymnorrhiza. 



1. B. gymnorrhiza, Lam. — ^N.W. Coast, A. Cunningham ; N. Coast, 

 R. Brown ; Roper River, F. v. Mueller ; Port Essington, and Limmen Bight 

 R-iver, Leichhardt. Bark said to contain 13 to 17 per cent, tannin. 



2. B. Rheedii, Blume. — Port Essington, A. Cunningham (ra^ther doubt- 

 ful) ; Islands of the Gulf of Carpentaria, Henne. Red or Orange Mangrove. 

 Bark said to contain 13 to 19 per cent, tannin. Useful cabinet wood. 



MYRTACE.ffl. 



Many of this order are useful bee-plants. Dr. Joseph Lauterer remarks 

 that the tan-resin gums are entirely endemic to 'Austraha, no plants of other 

 countries yielding an exudation similar to them in chemical composition. 



Tribe I. Chamaelauciece.- — Ovary l-celled, with a single placenta. Fruit 

 indehiscent, dry, with 1 or rarely 2 seeds. Shrubs often heath-hke. Leaves 

 small. Flowers sohtary, or very rarely 2, together in the axils of the leaves 

 or bracts, scattered along the branches, or forming a terminal head. 



Stamens definite, in a single series, more or less united in a ring at the base, 

 and often alternating with staminodia.' — 15. Verticordia. 



Stamens indefinite, without staminodia, numerous, or, if few, not regularly 

 alternate or opposite to the calyx-lobes. 



Calyx-lobes persistent, or rarely falHng off with the upper portion of 

 the tube. Ovules'2, on a filiform placenta attached both to the 

 base and summit of the ovary. — 12. Calycothrix. 

 Calyx-lobes short, deciduous. Ovules 2, the placenta basal or adnate 

 to one side of the ovary. — 13. Homalocalyx. 

 Stamens 5 or 10, regularly alternate with or opposite to the calyx-lobes, 

 quite distinct and without staminodia.' — 14. Thryptomene. 



Tribe II. Leftospermeie. — Ovary divided into 2 to 5, or rarely more cells. 

 Capsule opening at the summit in as many valves as there are cells, or very 

 rarely indehiscent, with 1 or 2 seeds. 



Stamens in a single row, definite or indefinite, shorter than or rarely ex- 

 ceeding the petals, free or united in bundles, alternating with the petals. 

 Leaves small or narrow. 



Leaves opposite. — 11. Baeckea. 

 Leaves alternate. — 8. Leptospermum. 



Stamens exceeding the petals, indefinite, either free or united in bundles, 

 opposite the petals. Leaves small or narrow, or rarely large and many-nerved. 

 Flowers closely sessile. 



Anthers versatile, with parallel cells, opening longitudinally. — 9. Mela- 

 leuca. 

 Anthers erect, attached by the base. Stamens united in bundles 

 opposite the petals.- — 10. Beaufortia. 



Stamens numerous, free or obscurely united at the base. Petals attached 

 by a broad base, free or consohdated into an operculum. Leaves usually large. 

 Flowers in umbels, heads or cymes, rarely sessile on the stem.^ — 7. Eucalyptus. 



