THE FLORA OF THE NOBTHERN TERRITORY. 207 



8. LEPTOSPEKMUM, Forst. 



(Fabricia, G-aertn. ; Macklpttia, Korth. ; Homalospermum, Schau. ; Peri- 

 calymma, Endl.). Teatree. 



1. L. abnorme, F. v. M. — Port Essington, Armstrong. 



9. MELALEUCA, Linn. 1767. 



(Asteromyrtus, Schau., 1843 ; Gymnagathis, Schau., 1843 ; Meladendron, 

 St. Lag., 1880; Melanoleuce, St. Lag., 1881; Cajuputi, Adans.) 

 Common name for genus, Teatree or Paperbark. 



Series I. Laterales. Leaves alternate. Flowers usually small, in 

 axillary or lateral clusters, the axis very rarely growing out, the rachio 

 woolly-pubescent or rarely glabrous. 



Leaves lanceolate, flat. Calyx glabrous. — 2. M. alsophila. 



Leaves broadly-oblong to lanceolate, flat, obtuse or scarcely mucronate. 

 Calyx pubescent. — 1. M. acacioides. 



Series II. Circumscissae. Leaves alternate (usually above lin. long). 



Flowers in axillary, lateral, or rarely terminal globular heads. Oalyx- 

 tube circumsciss at the top of the ovary after flowering, and falling ofp with 

 the lobes (persistent in the other series). Fruits more or less cohering in a 

 globular head. — 9. M. symphyocarpa. 



Series III. Spiciflorae. Leaves alternate or opposite. Flowers either 

 solitary or few and distinct, or in more or less interrupted oblong- 

 cylindrical spikes, sometimes at first terminal, but the axis usually growing 

 out before the flowering is over, rarely in dense lateral or cyhndrical spikes. 

 Rachis glabrous pubescent or villous. 



Leaves flat, often vertical, several-nerved, mostly above lin. long. Spikes 

 interrupted. 



Leaves 2 to Sin. long, broad or narrow. Stamens glabrous, 5 to 9 in 



each bundle. — 7. M. Leucadendron. 

 Leaves 1 to 2in. long, narrow. Stamens pubescent, 12 to 20 in each 

 bundle. — 6. M. lasiandra. 



Leaves flat, concave or undulate, several-nerved, acute or pungent-pointed, 

 under 1/2™- or rarely %in. long. — 4. M. genistifolia. 



Leaves flat and semiterete, narrow, obscurely 1 or 3-nerved. — 3. M. dissiti- 

 flora. 



Series IV. Capitatae. Leaves alternate or opposite. Flowers, at 

 least the males, in terminal globular heads, the perfect ones occasionally in 

 oblong or cylindrical dense spikes, the axis not growing out until after the 

 flowering is over, the rachis usually woolly-hirsute. Fruiting spike usually 

 very dense, globular or oblong, rarely reduced to 2 or 3 fruits. 



Sub-series I. Longifoliae. Leaves linear, terete, or flat, mostly 

 above lin. long. Flowers usually white or yellow. — 5. M. glomerata. 



Sub-series II. Peltatae. Leaves very small, often scale-like, more 

 or less peltately attached. Flowers small, in dense heads or spikes. — 8. 



M. minutifolia. 



1. M. acacioides, F. v. ilf. —Pandanus Swamps, Else's Creek, Amhem's 

 Land, and dry plains at the sources of the Roper River, F. v. Mueller. 



