204 THE FLOEA OF THE NORTHERN TERRITORY. 



Leaves orbicular ovate or lanceolate, very thick, the veins (fine and parallel 

 or irregular and oblique) scarcely conspicuous. 



Calyx not 3 lines diameter. Operculum short. Tropical species. — 



18. E. pallidifolia. 

 Calyx 4 to 6 lines diameter or more. Operculum as long as or longer 

 than the calyx-tube.^ — 17. E. pachyphylla. 

 Leaves long-lanceolate or linear, not very thick, the obhque veins fine, 

 but often conspicuous! Calyx rarely above 3 lines diameter. — 27. E. rostrata. 



Sub-series III. Subexsertm. — Peduncles axillary or lateral, or also the 

 upper ones more or less paniculate, terete or flattened, several- flowered. 

 Calyx-tube broad at the orifice. Eruit turbinate, the orifice not contracted, 

 the capsule level or slightly sunk, the valves often protruding when open. 



Leaves broad, with very diverging veins and distinctly reticulate. 

 Tropical or subtropical species. 



Flowers nearly sessile or on short thick pedicels. Operculum hemi- 

 spherical, short. — 22. E. platyphyUa. 

 Flowers small, distinctly pedicellate. Operculum conical. — 1. E. 

 alba. 

 Leaves long -lanceolate, with numerous rather irregular oblique veins, and 

 more or less reticulate. Fruit rather large.^ — 19. E. pateUaris. 



Sub-series IV. Incliisce.- — Umbels usually several- flowered, axillary or 

 lateral and solitary or several together, in lateral clusters or very short panicles, 

 and then sometimes reduced to 1 or 2 flowers each, the peduncles terete or 

 rarely flattened. Fruit more or less contracted at the oriflce, the ca.psule 

 sunk, the valves not protruding, excepting their points when acuminate b}^ the 

 splitting of the base of the style. 



Umbels solitary and simple, axillary or the upper ones almost paniculate. — 

 Leaves mostly opposite. — 2. E. aspera. 

 Leaves alternate. — 20. E. phoenicea. 

 Umbels several together, on very short lateral peduncles, forming short 

 panicles or clusters ; operculum very short and flat. Tropical or sub-tropical 

 species. 



Leaves mostly opposite, large, broad, thick, and rigid. Umbels 

 irregular, each often reduced to 1 or 2 flowers. Calyx 4 lines 

 diameter or more. — 12. E. grandifolia. 

 Leaves from broadly cordate and opposite to broadly lanceolate, 

 irregularly and conspicuously veined. Umbels many- flowered. 

 Pedicels long. Calyx under 3 hnes diameter. — 6. E. clavigera. 

 Leaves all narrow-lanceolate, with more regular veins. Pedicels 

 shorter. Calyx small (the whole inflorescence sometimes re- 

 duced to an apparently simple cluster). — 30. E. tessellaris. 



Sub-series V. Gorymbosce. — ^Flowers usually large (the umbels or very 

 rarely heads) all in a terminal corymbose panicle, or rarely a few of the lower 

 ones axillary. Fruit, often large, more or less urceolate, the capsule deeply 

 sunk. Seeds usually large, flat, with acute edges, often more or less expanded 

 in a variously-shaped wing. 



Leaves opposite, connate, large. — 21. E. perfoliata. 

 Leaves opposite, sessile, cordate. 



Branchlets rusty-pubescent. Leaves large. Fruit above 1 in. long. — 



11. E. ferruginea. 

 Branchlets and calyx bristly. Leaves small. Fruit | to |-in. long. 

 — 28. E. setosa. 



