Crotalaria sagittalis L. 

Common Name : Arrowhead rattlebox
Family : Fabaceae

HABIT

AN ANNUAL HERB, 15-30 CM HIGH.

STEMS

LIGHT GREEN, TERETE, HAIRY.

LEAVES

 ALTERNATE, 2-6 CM LONG AND ABOUT ONE-THIRD AS MUCH ACROSS; THEY ARE ELLIPTIC TO OBLONG, FLAT, SMOOTH ALONG THEIR MARGINS. BOTH THE UPPER AND LOWER SIDES ARE HAIRY. THE UPPER SURFACE IS MEDIUM GREEN, WHILE THE LOWER SURFACE IS GRAYGREEN. EACH LEAF HAS A SINGLE CENTRAL VEIN THAT IS PROMINENT. THE PETIOLES ARE HAIRY AND SHORT.

FLOWERS

RACEMES OF 1-4 FLOWERS ARE PRODUCED OPPOSITELY FROM SOME OF THE LEAVES. FLOWERS ARE YELLOW

FRUITS

THE SEED PODS ARE INITIALLY LIGHT GREEN, BUT THEY LATER TURN DARK BROWN OR BLACK AT MATURITY. FULL-SIZED SEEDPODS ARE 2.5-4 CM LONG AND ABOUT 1/3 AS MUCH ACROSS; EACH SEEDPOD CONTAINS SEVERAL SEEDS.