anka ▁and ▁has ▁been ▁introduced ▁into ▁Florida ▁ ▁Description ▁ ▁A ▁very ▁variable ▁species ▁and ▁numerous ▁' forms ' ▁of ▁variable ▁tax onom ic ▁status ▁have ▁been ▁discussed , ▁for ▁example ▁" T rop ica ". ▁Some ▁may ▁be ▁genu ine ▁vari eties ▁and ▁certainly ▁some ▁seem ▁ ▁The ▁" M i ▁O ya " ▁form ▁is ▁named ▁after ▁the ▁river ▁it ▁is ▁found ▁in ▁Sri ▁L anka . ▁ ▁Cult iv ation ▁An ▁easy ▁plant ▁to ▁grow ▁and ▁one ▁of ▁the ▁most ▁robust ▁C rypt oc ory ne ▁species ▁in ▁the ▁aqu arium ▁trade . ▁Very ▁variable ▁under ▁different ▁light ▁and ▁other ▁environmental ▁conditions . ▁ ▁It ▁is ▁propag ated ▁by ▁run ners . ▁ ▁S ources ▁ ▁D öt sch , ▁A . ▁ 1 9 8 4 . ▁C rypt oc ory ne ▁w end ti i ▁de ▁Wit ▁( P fl anzen port rait ). ▁Aqu a - Pl anta ▁ 3 - 8 4 ▁: ▁ 1 7 - 1 8 . ▁ ▁Jacob sen , ▁N . ▁ 1 9 8 7 . ▁C rypt oc ory ne . ▁A ▁Re vised ▁Hand book ▁to ▁the ▁Flora ▁of ▁C ey lon , ▁Vol . ▁VI : ▁ 8 5 - 9 9 . ▁ ▁M ö hl mann , ▁F . ▁ 1 9 8 5 . ▁Reich ▁an ▁Vari anten ▁ist ▁C rypt oc ory ne ▁w end ti i ▁De ▁Wit . ▁Das ▁Aqu arium ▁ 1 9 8 ▁: ▁ 6 2 9 -