Araceae (PDF)

46ARACEAEexcept for white center, ca. 12 cm, with proximal margins incurvedor ± overlapping to form a cylindric tube to 6 × 2.7cm, scarcely or slightly auriculate at throat; limb subovate-lanceolate,ca. 8 × 4 cm, apex aristate and recurved. Male spadixsubsessile, ca. 16 cm; fertile zone green, subterete, graduallyattenuate distally, ca. 4 cm, loosely flowered; male flowersstipitate, usually diandrous; stipe 0.2–0.9 mm; thecae ellipsoid,0.4–0.7 mm; appendix extending beyond throat of spathe tube,recurved, greenish, horsetail-shaped, ca. 12 cm, with many filiformsubulate neuter flowers; proximal neuter flowers scattered,3–4 mm; distal ones numerous and crowded, 2.5–5.5 cm.Female spadix unknown. Fl. Jun.Limestone crevices on hilltops; 600–700 m. Guangxi (Du’an)[Vietnam].One of us (Murata) recognizes Arisaema hippocaudatum S. C.Chen & H. Li (Acta Bot. Yunnan. 24: 607. 2002) as a rare Chinesespecies known only from the type and A. victoriae as endemic toVietnam. In A. victoriae, the main axis of the spadix appendix is distinctand much longer than the branches (neuter flowers) as in A.lihengianum, whereas in A. hippocaudatum, the main axis is not clearand (if still present) is of a similar size and shape to the branches in itsdistal part. On the other hand, one of us (Li) believes that the twoentities are conspecific, based on observations of cultivated plants.6. Arisaema pingbianense H. Li, Bull. Bot. Res., Harbin 8(3):99. 1988.屏 边 南 星 ping bian nan xingPlants monoecious and male. Rhizome prolonged and thin,10–15 × 1–2 cm, nodes swollen and globose. Cataphylls 3, palegreen with violet spots, encircling peduncle. Leaves 2, arising atdifferent seasons from different rhizome nodes; petiole green,cylindric, to 20 cm × 3–4 mm, base shortly sheathing; leaf blade3-foliolate, green, membranous; central leaflet with petiolule ca.1.7 cm, blade elliptic, 9–13.5 × 4–5.5 cm, base cuneate; lateralleaflets with petiolule 3–6 mm, blade obliquely ovate-lanceolate,base oblique, apex acuminate with acumen 1.5–2 cm; lateralveins 5–7 on each side, collective vein 1–2 mm from margin.Peduncle encircled by cataphyll, green, cylindric, shorterthan petioles, ca. 15 cm. Spathe tube subcylindric, 4–4.5 × ca.1 cm, throat margins spreading outward; limb green, with arounded white area ca. 1.5 cm in diam. at proximal part, oblong,3.5–4 cm, apex abruptly acuminate with a filiform tip.Spadix bisexual after sex change; proximal female zone congestedwith female flowers; ovary green, obovoid; distal malezone with sparse male flowers; synandria of 2 or 3 fused stamens;anthers brown to creamy white, globose, dehiscing by 2apical pores; appendix nearly filiform, ca. 3 cm, distal ca. 1 cmcovered with numerous filiform neuter flowers, brushlike;neuter flowers slightly recurved, brown or green, filiform, 2–3mm. Fl. Dec.● Secondary evergreen forests; 1000–1600 m. SE Yunnan.7. Arisaema rubrirhizomatum H. Li & J. Murata, sp. nov.红 根 南 星 hong gen nan xingType: China. Yunnan: Malipo, Xiajinchang, 1700–1850m, limestone area along stream, 21 Feb 1994, S. K. Wu, Y. P.Yang, J. Murata & T. Kawahara 243 (holotype, TI).Haec species Arisaemati victoriae V. D. Nguyen et A. hippocaudatoS. C. Chen & H. Li similis, sed ab eis appendicespadicis ex ore tubi spathae non exserta atque floribus neutrisbrevibus minus quam 7 mm longis differt.Plants basically dioecious. Rhizome erect, oblique, or horizontal,dark brown outside, purple in section, cylindric or conic,2–5 × 1–2 cm. Cataphylls 3, encircling pseudostem, lanceolate,membranous, outermost one 1–2 cm, innermost one 18–19 cm.Leaves 1 or 2; petiole purplish green or olive-green with palegreen spots, 30–50 cm, proximal 20–30 cm sheathing into pseudostem;leaf blade green, leathery, 3-foliolate; central leafletwith petiolule 1–4 cm, blade elliptic or oblong to lanceolate,12–26 × 5–12 cm, base cuneate; lateral leaflets sessile or withshort petiolule 1–4 cm, blade oblong-lanceolate or obliquelyovate, 10–20 × 3.5–11 cm, apex acuminate. Peduncle colored aspetiole, slightly longer than petioles, 30–50 cm. Spathe greenwith a white area ca. 2 cm in diam. at proximal part of limb;tube 3–5 × 1.5–1.8 cm, throat spreading outward; limb deltoidovate,5–7 × 3.5–5 cm, apex acute. Spadix basically unisexual;female zone ca. 2.2 × 1.5 cm; ovary obconic; ovules 2–4;synandria of 5 stamens, sessile; male zone ca. 3.5 cm × 5 mm,rarely with a few male flowers above; anthers ovoid, dehiscingby 2 apical slits; appendix dark purplish, 4–5 cm, slender, frombase to apex covered with rather numerous filiform or subclavateneuter flowers, brushlike. Berries reddish, ovoid, ca. 5mm in diam. Seed 1, yellowish, ca. 3.5 mm in diam., rugose. Fl.Feb–May, fr. Jul.● Evergreen forests, thickets, along streams, in limestone mountainareas; 1000–1900 m. SE Yunnan.8. Arisaema grapsospadix Hayata, Icon. Pl. Formosan. 5: 244.1915.毛 笔 南 星 mao bi nan xingArisaema nanjenense T. C. Huang & M. J. Wu; A. quinquefoliolumHayata.Rhizome oblong-ovoid, 3–5 × 1.5–2.2 cm. Leaves 2(or 3);petiole 18–30 cm, proximal 13–25 cm sheathing into pseudostem,dull purplish green, mottled with dark purple and orange,surrounded by several cataphylls; leaf blade 3- or 5-foliolate;leaflets base rounded to cuneate, margin entire, apex acute toacuminate, often mucronate at tip; central leaflet with petiolule1–2.5 cm, blade elliptic to lanceolate; lateral leaflets with petiolule3–10 mm, blade lanceolate to oblong, oblique at base.Spathe greenish on both surfaces with a semilunate white spotin throat; tube cylindric, (3–)4–6 × 1–1.7 cm; limb triangularovate,1.5–2 cm wide, apex acute. Spadix bisexual in matureplants; female zone ca. 2.5 cm × 5 mm; ovary obliquely conicovoid;stigma subsessile, pilose; ovules 4; male zone ca. 1.8 cm× 4–5 mm; synandria lax, of 3 stamens; anthers dehiscing by 2apical pores; appendix narrowly pyramidal, 6–7 cm, distal partfiliform and weakly curved, distal 1.2–2 cm covered with filiformneuter flowers ca. 3 mm. Berries red, conic-ovoid. Seeds 2or 3, cream-yellow spotted with dark purple. Fl. Mar, fr. Jul.● Low to middle elevations. S Taiwan.9. Arisaema hainanense C. Y. Wu ex H. Li, Y. Shiao & S. L.Tseng, Acta Phytotax. Sin. 15(2): 107. 1977.黎 婆 花 li po hua