Botanical name: Lagenandra undulata    Family: Araceae (Arum family)

Wavy Malayan Sword is a submerged perennial herb, growing in large patches. Cataphylls (small leaves) are upto 3 cm long, linear-lanceshaped, convolute, deciduous. Leaves are white spotted, alternate, stalked, sheathed ; sheaths overlapping 1-2 cm long, about 2 mm broad. Leaf-stalks are 1-7.5 cm long, about 2 mm broad, about equal to the blade, strongly striped, above deeply grooved ; blade 1.5-9 x 0.5-1.5 cm, elliptic-lanceshaped, tapering, fleshy when fresh, becoming thin on drying, margins wavy, base wedge-shaped ; midrib distinct. Flower-cluster-stalk arises in leaf-axils, partly enclosed in the leaf sheath, about 2 cm long, about 2 mm thick, round, strongly striped. Spathe is about 2 cm long, about 7 mm broad at base, tubular below, constricted in the middle, smooth with emphatic longitudinal parallel veins ; limb ovate-tapering, slightly twisted, tip shortly hooked, dark purple-blotched inside, obliquely septate at base within. Male inflorescence is at tip, about 3.5 x 2.5 rnm cylindric. Female inflorescence is about 3 mm below the male, spherical, about 3 mm in diameter. Young aggregate fruit is green, spherical, about 4 mm in diameter, enclosed in the persistent, cup-shaped basal part of the spathe. Wavy Malayan Sword is native to Arunachal Pradesh.

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The flower labeled Wavy Malayan Sword is ...