Aristolochia gigantea
Aristolochia gigantea was introduced at the end of the Meiji Era.  This plant also has a very unique flower and a specific shape even during its bud stage.  The unusual bud, which is light green and appears it is connected two rugby balls, and inflate rapidly.  The bigger part turns reddish purple from around its veins.  Later it is split vertically to open into a wide reddish purple calyx.  It is 20 to 30 centimeters in length, and it is written that it can reach even near 50 centimeters in Brazil where it grows wild.
This unique flower takes the role of skillful strategy for pollination which gives it an advantage in cross pollination to keep its genetic diversity.  It contains aristolichic acid as a chemical defense substance against plant predator and is toxic.  (See the genus Aristolochia)
Classification: Aristolochiaceae Aristolochia
Scientific name: Aristolochia gigantea
Japanese name: ---
English Name: ---
Native locality: Brazil
Ecological description: Climbing perennial
RDB : ---
Planting place: East Flowers and Ornamental Plants Greenhouse
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