h map ut ra ▁Valley ▁semi - ever green ▁for ests ▁e cor eg ion ▁lies ▁to ▁the ▁north , ▁the ▁M iz or am - Man ip ur - K ach in ▁rain ▁for ests ▁e cor eg ion ▁lies ▁to ▁the ▁east , ▁and ▁the ▁Lower ▁Gang etic ▁Pla ins ▁mo ist ▁decid uous ▁for ests ▁e cor eg ion ▁lies ▁to ▁the ▁west ▁and ▁south ▁in ▁Bang l adesh . ▁ ▁Flora ▁ ▁The ▁elev ated ▁and ▁d amp ▁forest ▁e cor eg ion ▁is ▁a ▁center ▁of ▁divers ity ▁for ▁the ▁tree ▁gener a ▁Magn olia ▁and ▁Michel ia , ▁and ▁the ▁families ▁Ela e oc ar pace ae ▁and ▁Ela e agn aceae . ▁Over ▁ 3 2 0 ▁species ▁of ▁orch ids ▁are ▁native ▁to ▁Meg hal aya . ▁The ▁en demic ▁pitch er ▁plant ▁( N ep enth es ▁k has iana ) ▁is ▁now ▁an ▁end anger ed ▁species . ▁About ▁ 3 , 1 2 8 ▁flow ering ▁plant ▁species ▁have ▁been ▁reported ▁from ▁the ▁state , ▁of ▁which ▁ 1 , 2 3 6 ▁are ▁en demic . ▁In ▁the ▁later ▁half ▁of ▁the ▁ 1 8 0 0 s , ▁Joseph ▁Dal ton ▁Hook er , ▁a ▁British ▁botan ist ▁and ▁expl orer , ▁made ▁a ▁huge ▁tax onom ic ▁collection ▁for ▁the ▁K ew ▁Her b arium ▁from ▁K has i ▁and ▁J aint ia ▁Hills ▁and ▁remarked ▁the ▁place ▁as ▁one ▁of ▁the ▁rich est ▁b iod iversity ▁sp ots