122 THE FLORA OF THE NOETHEEN TEEEITOEY. 



Leaves simply pinnate. 



Sepals and petals 5 ; stamens 10 ; anthers all perfect, opening in 



terminal pores or short slits, or some minute and empty. 



Leaves abruptly pinnate. — 11. Cassia. 

 Sepals and petals 5. Stamens 3, with perfect anthers opening in 



■longitudinal sUts ; 2 small staminodia. Leaves unequally pinnate. 



— 10. Petalostylis. 

 Sepals and petals 4 or 5. Stamens 2, opening in terminal pores. 



Leaves unequally pinnate or with sessile digitate leaflets. — 



9. Labichea. 

 Sepals 4. Petals 3. Stamens 3 or 2 perfect, 4 or 5 minute stamin- 

 odia. Leaves abruptly pinnate. Pod thick. — 7. Tamarindus. 

 Leaves of 2 leaflets or 2-lobed. Stamens 10 or fewer. — 8. Bauhinia. 



Sub-order III. Mimosece. — Flowers 5-merous, 4-merous, rarely 3-merous 

 or 6-merous, small, regular, sessile in spikes or heads, or very rarely shortly 

 pedicellate. Sepals valvate, often united. Petals valvate (except in Erythro- 

 phloeum), often united. Stamens equal to or double the number of petals or 

 indefinite . Radicle straight . 



Stamens twice as many as petals. 



Petals slightly imbricate. — 6. Erythrophloeum. 

 Petals strictly valvate. 



Anthers tipped with a gland. — 5. Dichrostachys. 

 Anthers without any gland. Pod short, flat, falcate or obHque. 

 Lower flowers of the spike often with long, linear, coloured 

 staminodia. Herbs or undershrubs. — 4. Neptunia. 



Stamens indefinite. 



Stamens, at least in the hermaphrodite flowers, all free. — 3. Acacia. 

 Stamens monadelphous. 



Pod flat and thin, straight or scarcely falcate. — 2. Albizzia. 

 Pod curved or twisted, 2-valved and often reddish or pulpy 

 inside, or separating into indehiscent articles. — 1. Pithe- 

 colobium. 



1. PITHECOLOBIUM, Maet. 

 (Cathormion, Hassk.). 



1. P. moniliferum, Benth.—Okej Creek, G. P. Hill (No. 765), 16/2/1912. 



Recorded. Point Pearce, Victoria River, F. v. Mueller ; Islands of the 

 Gulf of Carpentaria, R. Brown ; along all the watercourses round the Gulf of 

 Carpentaria, Leichhardt. 



2. ALBIZZIA, Dura. 



1. A. procera, Benth. — Gloucester Island, Henne. Wood resembling 

 walnut. 



3. ACACIA, Linn. 1737. 



( Arthrosprion, Hassk., 1855 ; ChitonanthMs, Lehm., 1847 ; Farnesia, 

 Gasp., 1838 ; Hoopesia, Buckl., 1862 ; Phyllodoce, Link., 1831 ; Tetracheilos, 

 Lehm., 1847 ; Vachellia, Wight and Am., 1834 ; Zigmaloba, Bafin., 1838). 



The bark of many is used in tanning ; and many also, at certain periods of 

 their growth, produce a saponin poisonous to stock. 



