Description ⁴

Vines. Roots 9--13(--30) × 1--2 cm. Stems often branched, base woody. Leaves opposite or whorled, rarely alternate; petiole 3--10 cm; leaf blade ovate to ovate-lanceolate, 6--24 × (2--)5--17 cm, membranous, veins 7--13, base cordate, margin slightly undulate, apex acuminate. Inflorescences racemes, 1--3-flowered; peduncle or pedicel axillary or rarely borne on petiole, 2.5--5(--12) cm; bracts lanceolate, 5--10 mm. Perianth segments greenish with purplish veins, 3.5--7.5 × 0.7--1 cm, apex acuminate. Stamens purple, slightly shorter than perianth; filaments stout, 2--5 mm; anthers linear, ca. 10 mm; appendages partially adherent, adaxial one ca. 5 mm. Capsule ovoid-oblong, 2.5--6 × 1--3 cm. Seeds several. Fl. Apr--Jul.

Sources and Credits

1. (c) Tony Rodd, some rights reserved (CC BY-NC-SA), https://www.flickr.com/photos/tony_rodd/2161039375/
2. (c) 潘立傑 LiChieh Pan, some rights reserved (CC BY-NC-SA), https://www.flickr.com/photos/plj/2673611817/
3. (c) 潘立傑 LiChieh Pan, some rights reserved (CC BY-NC-SA), https://www.flickr.com/photos/plj/2674430458/
4. (c) Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA, some rights reserved (CC BY-NC-SA), http://eol.org/data_objects/4996195

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