What is Aristolochia salvadorensis

Aristolochia salvadorensis) the Aristolochiaceae inhabiting the Central American non-cold-resistant Evergreen small shrub. Strange flower stalk elongation along the ground, such as "Darth Vader" of dark reddish brown mask (actually is calyx), one by name. Each flowers continue to bloom a week or so.

Common name: Aristolochia salvadorensis
scientific name:Aristolochia salvadorensis,
origin: El Salvador, Central America, environment: tropical rain forests, living type: Evergreen small trees, height: 3-5 m,　Leaf arrangement: in tubular flowers with adhesion to seem like alternate, margin: hermaphrodite flowers, rippling, bilaterally symmetrical flower calyx: sepals to tip three-lobed. Petals, flower size (Cup size): 4 - 5 cm (calyx color) color: dark reddish-brown inner, whitish mesh (outer), stamens 6, less stigma to cementation, pistil short propagation: cuttings