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Aristolochia tonduzii
O.C. Schmidt
Family:
Aristolochiaceae
[
Aristolochia chapmaniana
Standl.,
more
Aristolochia maxima var. cordata
Standl.
]
Thomas Croat
Flora of Barro Colorado Island
Resources
The Flora of Barro Colorado Island by Thomas Croat
Twining liana, sparsely hispidulous; trunk corky and deeply fissured near ground, to ca 5 cm diam. Leaves alternate; petioles 8-22 mm long; blades oblong-spatulate, acute to obtuse at apex, deeply cordate at base, 10-20 cm long, 3-6 cm wide, glabrate above, inconspicuously short-pubescent below. Flowers solitary, axillary, usually slightly arched, dark purple-brown; calyx expanded into a narrow ellipsoid balloon ca 6 cm long, then constricted into a tube ca 3.5 cm long, the tube split on one side to form an oblong-lanceolate limb to 7 cm long; corolla lacking; stamens 6, the anthers sessile and adnate to style; styles 6, connate; stigmas capitate. Capsules ovate-cylindrical, prominently 6-ribbed, 10-12 cm long, ca 5 cm wide, on a long stipe, dehiscing from apex to base, the 6 valves spreading widely to disperse seeds but remaining attached on both ends, the inner valves diverging through outer valves at apex and attached to outer valves by a ladderlike series of fibers, the fibers acting to slow dispersal of seeds; seeds very numerous, flattened, stacked in 6 vertical rows, the seminiferous part cordate, ca 5 mm diam, bearing 2 unequal pairs of lateral wings ca 2 cm wide, the sides of the wings +/- rounded, the longer pair ca 1.2 cm long, the shorter pair ca 0.8 cm long. Croat 5958, Shattuck 413 (type). Occasional, in the forest and along the shore. Flowers from at least November to January. The fruits, with some seeds, reported from April to September. Capsules may hang on all year. Zone and Panama and from premontane wet forest in Coclé
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Thomas Croat
JOESPH WRIGHT
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