Arisaema penicillatum (Araceae)
Tuber globose, 1–2(–3)cm in diam. Cataphylls lanceolate, ca. 8cm. Leaves 2; petiole 25–30cm, below middle sheathing into pseudostem; leaf blade 3-foliolate; central leaflet petiolulate, elliptic, ca. 14 × 6cm; lateral ones subsessile, shorter than terminal, oblong-lanceolate, ca. 10 × 4cm, base oblique, apex acuminate; collective vein 0.3–2mm from margin. Peduncle as long as or longer than petioles. Spathe tube pale green, cylindric, 4–6 × 1.2–2cm, throat margins spreading but not re-curved; limb transversely demarcated between proximal white part and distal green part, oblong, 2–5cm, apex acuminate with tip. Spadix unisexual. Female spadix: female zone green, pyramidal, ca. 1.5cm; ovary ovoid; ovules 5, apex constricted into a short style; stigma capitate; appendix green, narrowly cylindric, 4–5cm × 2–3mm, base ca. 2cm and apex 8–10mm, covered with broadly filiform neuter flowers (1.5–2mm). Male spadix: male zone narrowly conic, 3–4cm, with sparse male flowers; synandria of 3 stamens; anthers ovoid, opening by longitudinal apical slits; appendix filiform, 3–4cm, at apical 1–1.5cm covered with filiform or subulate neuter flowers (1–2mm).
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.
Understories of dense forests.