| Senna siamea (Lam.) Irwin & Barneby |
| FABACEAE |
| cassod tree, kassod tree, Siamese cassia, pheasantwood, Thailand shower |
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Unknown, Potential problem species |
| Origin: India, Sri Lanka and Malaysia |
| Growth Form: Tree |
| Plant Description: Tree, to 30 m tall, spreading, pubescent on the leaf undersides and inflorescence, soon glabrescent. Leaves (10-) 15-20 (-35) cm long including a terete petiole 25-40 mm long; stipules minute, subulate, persistent; leaflets in (4-) 6-8 (-16) pairs spaced 15-30 mm apart, stipules minute, subulate, persistent; leaflets in (4-) 6-8 (-16) pairs spaced 15-30 mm apart, oblong, 30-50 (-75) mm long, (12-) 20-30 mm wide, increasing medially or distally, emarginate and mucronulate; glands absent, replaced by transverse bars between the leaflets. Inflorescences of 10-20 (-60) flowers, in upper axils, forming a many-flowered panicle to 40 cm long; peduncles 15-25 mm long; pedicels 15-20 (-35) mm long; bracts subpersistent. Petals (10-) 15-25 mm long. Fertile stamens 7 or 10 (with 3 large staminodes); filaments unequal, the lateral abaxial ones 7-12 mm long, the others 2.5-5.5 mm long; anthers subequal, weakly beaked, 5-8 mm long, opening by one U-shaped pore. Pod flat, 15-25 (-30) cm long, 10-15 mm wide, straight but laterally curved, entire. Seeds lustrous, with a narrowly spathulate areole. |
| Key Features: |
| Control: |
| Comments: Suspected/Possible |
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| KEY |
 Confirmed (herbarium specimen) |
 Visual record |
 Suspected |
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