Arisaema vexillatum (Araceae)
Plants dioecious. Tuber brown outside, white inside, depressed globose, 1.5–3cm in diam. Cataphylls 2 or 3, pink to purple, to 8cm, membranous. Leaf solitary; petiole greenish, not spotted, terete, 15–18cm, basal part forming pseudostem, smooth, not verrucose; leaf blade 3-foliolate; leaflets subsessile, green usually with bluish margins; central leaflet broadly obovate or rhombic, 4–5(–11) × 4–5(–10.5)cm, apex abruptly acuminate or rounded with an acumen 2–3mm; lateral leaflets larger than central one, ovate or rhombic, 8–9(–15) × 4(–9)cm, base cuneate, slightly oblique, apex acuminate. Peduncle greenish as petiole, shorter than petioles, 6–10cm. Spathe tube dark purple with whitish longitudinal lines, cylindric, 4.5–5 × 1.5–2cm, throat obliquely truncate, slightly recurved, not auriculate, inside distinctly lamellate, throat abruptly constricted into an intermediate zone 1.5–2cm wide; limb above intermediate zone strongly dilated, reniform or subcordate, 3–5 × 4–7cm, purple with whitish reticulate networks, apex rounded with a tubular tail 3–4cm. Spadix unisexual; female zone conic, ca. 1.2cm × 8mm; ovary green; stigma subsessile, dark purple, ovoid; male zone cylindric, ca. 2cm × 5mm; synandria of 3 or 4 stamens; connected filaments purple, distinct; anthers yellowish, globose, dehiscing by horseshoe-shaped slit. Appendix purple, flagellate, recurved distally following spathe limb, 9–11cm, base swollen, 4–5mm in diam., truncate and stipitate; stipe 8–10mm.
This material was reprinted with permission from the Missouri Botanical Garden Press, St. Louis, and Science Press, Beijing.
This material was reprinted with permission from the Missouri Botanical Garden Press, St. Louis, and Science Press, Beijing.
Thickets, grasslands on slopes.