Aristolochia ringens
Aristolochia ringens also has a very unique flower and a specific shape even during its bud stage.  The bud of this flower consists of two different characteristic parts which are connected the each other.  The calyx is distorted to form one part which is light green and deformedly egg-shaped.  The other part is a pair of limbs which extends long like a bird's beak.  Later the bud grows to inflate rapidly and turn reddish purple from around its veins.  Then, at last the upper part of the lower limb is split vertically to open like a gutter.  At that time the inside of the opened limb is very hairy.  That figure can look like a bird, so it has another name, Pelican flower.
This unique flower takes its role of skillful strategy for pollination which gives advantage in cross pollination to keep its genetic diversity.  It contains aristolichic acid as a chemical defense substance against plant predators and is toxic.  (See the genus Aristolochia)
Classification: Aristolochiaceae Aristolochia
Scientific name: Aristolochia ringens
Japanese name: ---
English Name: ---
Native locality: South America
Ecological description: Climbing perennial
RDB : ---
Planting place: East Flowers and Ornamental Plants Greenhouse
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