Sunn Hemp: Chiang Mai
(Crotalaria juncea)
Crotalaria juncea is an annual herbaceaous plant utilized for fiber, forage, and as a green manure cover crop. Reaching heights of 3.5 m, C. juncea bears long, slender, trifoliate leaves and typical, butterfly-shaped blooms similar to other legumes.
A prolific local variety. Can grow up to 2 m (6 ft).