Araceae (PDF)

ARACEAE 61male zone cylindric, 1.8–3 cm, densely flowered; synandria sessile,consisting of 2–4 anthers, each with 2 thecae dehiscing byapical pores. Appendix sessile, sigmoid or simply curved forward,yellowish green to violet, 4–17 cm × 2.5–4 mm. Fl. Apr–Jun.● Grassy slopes, valley thickets along Jinsha Jiang; 1800–2800 m.NW Yunnan.53. Arisaema odoratum J. Murata & S. K. Wu, J. Jap. Bot. 69:153. 1994.香 南 星 xiang nan xingPlants monoecious or male. Tuber subglobose. Cataphylls2 or 3, membranous. Leaves 1 or 2; petiole green to purplish,unmarked, 13–22 cm, basal 4–7 cm sheathing into pseudostem;leaf blade 3-foliolate; leaflets sessile, ovate to oblong, basecuneate, margin entire, apex acuminate. Inflorescence fragrant;peduncle green, nearly as long as petiole. Spathe white, 7–8 cm;tube funnelform, gradually opening to blade; limb ovate oroblong to narrowly oblong, 5.5–6 × 1.7–4 cm, apex acute toacuminate, bending forward. Spadix male or bisexual; femaleflowers green or cream-colored, congested in basal part ofspadix; male flowers white. Appendix extremely fragrant, sessile,dull green, becoming orange, whip-shaped, 5–9 cm, bentdown from throat of spathe. 2n = 22*.● Humid grassy slopes at forest margins; ca. 1400 m. NC Yunnan(Dayao).54. Arisaema mairei H. Léveillé, Cat. Pl. Yun-Nan, 10. 1915.乌 蒙 南 星 wu meng nan xingArisaema maireanum Engler; A. wumengense H. Li.Plants dioecious. Tuber renewed seasonally, dark brownoutside, whitish inside, depressed globose, ca. 3 × 4–5 cm.Cataphylls 2 or 3, greenish with pink and whitish blotches orwhitish with brownish apex, 17–18 × ca. 2.7 cm, papery, apexobtuse. Leaves 2; petiole green but sheathing part often withdark brown short stripes, 30–40 cm, proximal 25–30 cmsheathing into pseudostem, encircled in cataphylls; leaf bladepedate, 5–7-foliolate or palmate-digitate; leaflets sessile, baseconnected and closed, light green abaxially, dull green adaxially;central leaflet subsessile, elliptic to broadly oblong, baseacute, apex acute or acuminate; lateral leaflets as central onebut somewhat smaller, outermost ones ca. 8 × 3 cm. Pedunclegreen, unmarked or with whitish dots, usually shorter thanpetioles, 33–36 cm. Spathe emerging from pseudostem; tubegreenish outside, white inside, unmarked, cylindric, ca. 4 × 1.4–2 cm, smooth, throat slightly recurved, not auriculate; limbwhite, unmarked, narrowly ovate, 9–11 × 3.7–5.5 cm, apexacute or acuminate, slightly incurved. Spadix unisexual; femalezone greenish, conic, ca. 1.5 × 1 cm; ovary obovoid; style pyramidal,short; stigma small, papillose; male zone cylindric, 1.5–2cm × ca. 3 mm; synandria dense, subsessile; anthers 2 or 3,yellowish, thecae globose, dehiscing by apical pores. Appendixsessile, dark green throughout or whitish in basal 2–3 cm, greenin middle ca. 1.5 cm, dull brownish purple distally, cylindric,narrowed distally, ca. 14 cm in total, 3–5 mm in diam., partexserted from spathe tube recurved and pendulous, apex filiform.Fl. Jun–Jul.● Thickets, grassy slopes, riversides; 1900–2000 m. S Sichuan(Huidong), Yunnan (Huize, Luquan).55. Arisaema thunbergii Blume subsp. autumnale J. C. Wang,J. Murata & H. Ohashi, Bot. Bull. Acad. Sin. 37: 75. 1996.东 台 南 星 dong tai nan xingPlants dioecious. Tuber depressed globose, 3–6 cm indiam. Cataphylls purplish to brownish, membranous, apexmucronate. Leaf solitary; petiole terete, 25–50 cm, proximallyforming pseudostem; leaf blade pedate; leaflets 11–15, oblanceolateto elliptic, base cuneate, apex acuminate; central leaflet10–28 × 2–7.5 cm. Peduncle usually shorter than petioles, 15–35 cm. Spathe white or pale yellow with dark to bronze-purpleor reddish purple stripes; tube white or pale yellow with longitudinalpurple stripes outside and dark purple stripes inside,cylindric, auriculate at throat, 5–7 × 2–2.5 cm; limb triangularovate,7–10 × 4–5 cm, apex acute to acuminate. Spadix unisexual;female zone cylindric, 1.5–2 cm; male zone 3–4 cm;synandria stipitate, consisting of 4 anthers, thecae dehiscingfrom lateral slits. Appendix long exserted from spathe, filiform,40–60 cm, proximally narrowly cylindric, smooth, graduallynarrowed at both ends, distally bent downward and pendulous.Fl. May–Jul.● Forests, thickets; near sea level to 1100 m. E and N Taiwan.A Chinese record of Arisaema thunbergii subsp. urashima (H.Hara) H. Ohashi & J. Murata from Taiwan (J. C. Wang, Taiwania 37:54–57. 1992) is referable to A. thunbergii subsp. autumnale.56. Arisaema cordatum N. E. Brown, J. Linn. Soc., Bot. 36:177. 1903.心 檐 南 星 xin yan nan xingArisaema brevistipitatum Merrill.Plants dioecious. Tuber globose, 1–1.5 cm in diam. Cataphylls2 or 3, ca. 5 cm, membranous. Leaf solitary; petiole 10–30 cm, slender, base forming short pseudostem; leaf bladepedate; leaflets (5–)7, sessile, light greenish, oblong, 7–10 ×1.5–3 cm, membranous, base broadly cuneate, apex acute toabruptly acuminate. Inflorescence emerging before leaf unfolds;peduncle 3–10 cm, slender. Spathe basically purplish; tubecream-colored, outside stained with purplish, inside dark purple,funnelform, 3–3.5 × 1–1.4 cm, throat margins broadly expandedto limb; limb broadly cordate, ca. 6 × 4 cm, apex acuminateand involute, surrounding spadix appendix. Spadix unisexual;female zone ca. 1 cm; ovary fusiform; male zone ca. 1 cm× 3 mm, shortly stipitate; synandria consisting of 2 anthers,thecae globose, dehiscing by apical pores. Appendix sessile,15–27 cm, proximally fusiform, to 4 mm in diam., distally upright,exserted through involute apex of spathe limb, filiform.Fl. Apr.● Guangdong, Guangxi.