Arisaema jacquemontii (Araceae)
Tuber subglobose, 1.2–3cm in diam. Cataphylls 1 or 2, whitish, occasionally brown, to 20cm, membranous, apex acute or obtuse. Pseudostem, petiole, and peduncle pale green, unmarked. Leaves 1 or 2; petiole (2.5–)20–52cm, proximal 4/5 sheathing and forming pseudostem; leaf blade palmate; leaflets 5(or 7 or 9), sessile, ovate, oblong, or lanceolate, base attenuate, apex acuminate; central leaflet 7–18 × 2.5–7 cm; lateral leaflets 3–7 × 0.8–2.5m. Peduncle as long as petioles. Spathe green outside, greenish inside; tube cylindric, 2.5–8 cm × 8–20mm, throat obliquely truncate, not recurved; limb arching over spadix, ovate to narrowly ovate or oblong-triangular, 2.5–5(–9)× 1–2.5(–3.5)cm, apex acuminate into ascending filiform tail 2.5–6cm. Spadix unisexual; female zone 1.5–3 cm × 5–7mm; ovary greenish, narrowly ovoid; stigma spherical; male zone cylindric, 2–3 cm × 3–3.5mm; synandria sessile, lax, cream-colored or tinged dark purplish; anthers 2–4, dehiscing by apical pores or slits. Appendix greenish proximally, purplish distally, 2–8cm × ca. 1mm, distal part emergent from spathe tube horizontal to decurved, tapering, base swollen, truncate to 3–5mm in diam., shortly stipitate, smooth. 2n = 52.
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.
Coniferous forests, open grassy places in forests, Juniperus or Rhododendron thickets, forest margins.