Senna. decandria monogynia. 341 



4. S. toroida. R. 



Annual. Leaflets three pair, cuneate, obovate, a subu- 

 late gland between the lower pair only. Flowers in axil- 

 lary pairs on a short common peduncle. Stipules subu- 

 late. Legume linear, four-sided. 



The seeds of this plant were sent from Mysore to the 

 Botanic garden at Calcutta by Dr. Buchanan in 1800, 

 and about the close of 1801 the plants blossomed. 



Stem annual, erect, somewhat woody branches ; spread- 

 ing, height of the whole plant about six feet. Leaves 

 pinnate, spreading or drooping. Leaflets three pair, oc- 

 cupying the exterior half of the petiole, obovate-cuncate, 

 sessile, entire, villous ; the lower pair smaller ; all some- 

 what acuminate, with a small soft bristle, from one 

 to two inches long. Glands, a single, yellow, subulate 

 one between the lower pair of leaflets only. Stipules 

 subulate, villous. Flowers axillary, in pairs, large, yel- 

 low, on long pedicles, inserted on a short common pedun- 

 cle, with some small bractes about the insertion, one of 

 the two uniformly proves abortive. Petals, the upper one 

 obcordate, the rest oval. Filaments, the three upper ones 

 minute, and abortive ; the lower seven nearly equal and 

 fertile. Legume long, straight, four-sided, with a dou- 

 ble groove, or three keels on each margin, from six to 

 nine inches long. Seeds numerous, from twenty to thir- 

 ty, trapeziform, smooth, pale brown. 



This plant is allied to C Tora. The best specific dif- 

 ference is one gland only, and that between the lower 

 pair of leaflets, in Tora there are always two, that is 

 one between each of the two lower pairs. But in appear- 

 ance and smell the difl'erence is very great. This grows 

 nearly erect, to the height of six or more feet, and has 

 little or no smell whereas in the same soil, and with the 

 same treatment. Tora is diffuse, rarely more than one or 

 two feet high, the flowers and legumes are much smaller, 

 and the smell very different. 



