Green pitcher-plant is a carnivorous herb arising from moderately branched rhizomes that are 1-1.5 cm (0.4-0.6 in.) in diameter. Leaves are of two types: pitchers and phyllodia. The pitcher leaves (tubular leaves), which appear in spring, are 20-75 cm (8-30 in.) long, 6-10 cm (2.4-4 in.) in circumference at the orifice, and gradually narrow from the orifice to the base. Pitchers are green to yellow-green with sunlit leaves sometimes maroon suffused, externally maroon veined, or, rarely, with a purple blotch at the orifice. A similarly colored hood arches over the orifice. Pitcher leaves wither by late summer and are replaced by falcate phyllodia (flattened leaves), which persist until the next season. Flowers are borne singly on scapes 45-70 cm (18-28 in.) long. The petals are yellow. The fruit is a tuberculate capsule 1.5-1.8 cm (0.6-0.7 in.) wide.
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