Arisaema menglaense (Araceae)
Plants perennial, evergreen, monoecious or male. Rhizome erect, light brown outside, violaceous in section, oblique or horizontal, cylindric, 5–6 × 2.5–3cm, with numerous nodes bearing buds, roots 10–15cm. Pseudostem absent. Cataphylls 5, flesh-colored, 5–8 × 1.5–2cm, membranous, 2 encircling petiole and peduncle, 3 enclosing peduncle directly. Leaves 1 or 2, arising at different seasons from different rhizome nodes; petiole viridescent with inconspicuous white spots, cylindric, ca. 45cm × 5–8mm; leaf blade green, 3-foliolate; central leaflet with petiolule ca. 1.7cm, blade elliptic, ca. 21 × 11cm, base cuneate, apex acuminate with acumen ca. 1cm; lateral leaflets with petiolule ca. 1.5 cm, blade obliquely broadly lanceolate, ca. 20 × 8cm, base broadly cuneate, apex acuminate with acumen 0.9–1cm; lateral veins 7–9 on each side, collective vein 4–9mm from margin. Peduncle green, cylindric, shorter than petioles, ca. 20 × 0.5cm. Spathe green, with numerous longitudinal veins; tube funnel-shaped, ca. 7 × 1.5–3cm, throat margin recurved to 8mm wide; limb bent forward, oblong, ca. 6.5 × 4cm. Bisexual spadix ca. 3.5cm; female zone ca. 1.5cm; female flowers densely arranged; ovary greenish, obovoid, ca. 2.5 × 1–2mm; ovules 4, erect; male zone ca. 2cm; synandria sparse; synandria of 2 or 3 fused stamens; stalk ca. 2mm; anthers 3, each comprising 2 thecae; thecae subglobose, ca. 1mm in diam., dehiscing by an apical slit; appendix sessile, erect, proximally purple, distally green, ca. 5.5cm × 1–4mm, usually exserted from spathe tube by ca. 1cm, wholly covered by filiform neuter flowers; neuter flowers erect, green, 5–10mm. Male spadix ca. 3cm × 2mm; appendix ca. 5cm.
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.
Tropical seasonal forests.