Araceae (PDF)

62ARACEAE8. Arisaema sect. Dochafa (Schott) H. Hara, Bull. Univ. Mus. Univ. Tokyo 2: 344. 1971.黄 檐 组 huang yan zuDochafa Schott, Syn. Aroid. 24. 1856.Tuber subglobose. Leaves 1 or 2; leaf blade pedate. Spathe small; tube ovoid; limb incurved, ovate. Spadix bisexual and male.Appendix ellipsoid, small. Infructescence nodding.One species: arid and cool areas at high elevations (2200–4000 m) in Africa, SW Asia (Arabian Peninsula), and the Sino-Himalayan region.57. Arisaema flavum (Forsskål) Schott subsp. tibeticum J.Murata, J. Jap. Bot. 65(3): 71. 1990.黄 苞 南 星 huang bao nan xingArisaema daochengense P. C. Kao; A. flavum var. tibeticum(J. Murata) Gusman & L. Gusman.Plants monoecious and male. Tuber subglobose, 1.5–2.5cm in diam. Cataphylls 3–5, green, 8–25 cm. Leaves 1 or 2;petiole green to purplish, unmarked, 11–35 cm, sheathing forca. 4/5 length forming pseudostem; leaf blade pedate; leaflets5–11(–15), sessile, glaucous abaxially, green adaxially, oblonglanceolateor obovate-lanceolate, base cuneate, apex acuminate;central leaflet largest, 9–12 × 3–5 cm; outer (lateral leaflets)gradually decreasing to outermost (1.5–4 × 1–1.2 cm). Peduncleemerging from pseudostem, green, 15–30 cm. Spathesmallest in genus, 2.5–6 cm in total; tube yellowish green,ovoid to globose, 1–1.5 × 1–1.4 cm, constricted at dark purplethroat with nectar inside; limb yellow or green, inside darkpurple at least at basal part, oblong-ovate, 1.5–4.5 × 0.8–2 cm,apex acuminate, slightly incurved. Spadix bisexual or male,very short, 1–2 cm in total; female zone proximal, 3–7 × 5–7mm; ovaries congested, greenish, obovoid; stigma sessile; malezone distal, light yellow, cylindric, 3–7 × 2–3 mm; synandriacongested, usually consisting of 2 anthers; thecae sessile, dehiscentby apical pore. Appendix yellowish or yellow green, ellipsoid,2–5 × ca. 1.5 mm, very short, rugose when dry. Matureinfructescence nodding, subglobose, ca. 4 cm in diam. Berriesobovoid, 3–4 × 3–5 mm. Seeds 3, pale yellowish, 2–2.5 mm. Fl.May–Jun.Rocky slopes, thickets, croplands, field sides; 2200–4400 m. WSichuan, SE Xizang, NW Yunnan [Bhutan, NE India].According to chromosome number and plant size, Murata (J.Jap. Bot. 65(3): 65–73. 1990) divided Arisaema flavum into three subspecies:subsp. abbreviatum (Schott) J. Murata (2n = 56, tetraploid)including C and W Himalayan (Afghanistan to Nepal) and Arabian(Oman) plants; subsp. flavum (2n = 56, tetraploid) including Africanand Arabian plants; and subsp. tibeticum (2n = 28, diploid) includingplants from Bhutan, China, and NE India.9. Arisaema sect. Decipientia (Engler) H. Li in C. Y. Wu & H. Li, Fl. Reipubl. Popularis Sin. 13(2): 166. 1979.雪 里 见 组 xue li jian zuArisaema [unranked] Decipientia Engler, Pflanzenr. 73(IV. 23F): 195. 1920.Underground stem a cylindric rhizome, branched. Leaves 2, pedate. Spathe auriculate at throat, long caudate at apex. Appendixstipitate, erect with truncate base, obtuse or narrowed at apex.One species: SW China, NE India, Myanmar, Vietnam.58. Arisaema decipiens Schott, Oesterr. Bot. Wochenbl. 7: 373.1857.雪 里 见 xue li jianArisaema guixiense S. Y. Liu; A. rhizomatum C. E. C.Fischer; A. rhizomatum var. nudum C. E. C. Fischer; A. rhizomatumvar. viride C. E. C. Fischer.Rhizome cylindric, to 9 × 2.5 cm. Cataphylls 3 or 4, yellowishpurple with dark brown or whitish spots, 2–15 cm.Leaves 2; petiole greenish or reddish with dark green or darkpurple spots, 15–90 cm; leaf blade pedate, palmate; leaflets(3–)5–7, petiolulate, greenish and sometimes with purple spotsabaxially, dark green adaxially, narrowly oblong to elliptic, basecuneate, apex acuminate; central leaflet with petiolule developedto 5 cm, blade 8–18 × 3–8 cm; outermost leaflets 5–6 ×1.5–2 cm. Spathe green, usually with dark purple dots; tubecylindric, white toward base, 4–6 × 1.5–2 cm, throat obliquelytruncate, slightly outcurved; limb deep green, lanceolate toovate-lanceolate, 4–9.5 × 3–3.5 cm, apex acuminate and caudate,tail 6–10 cm, curved forward. Spadix unisexual; femalezone conic, 1.5–2 cm, 7–13 mm in diam. at base; ovary green,bottle-shaped; stigma sessile, purple; male zone 2–2.5 cm;synandria lax; anthers 2 or 3; thecae dehiscing by lateral slits.Appendix erect, green, usually with dark purple dots, terete, 5–7 × ca. 0.7 cm, rugose or echinate, base stipitate, apex rounded.Berries red. Seeds 1–3, obovoid, ca. 5 mm. Fl. Sep–Jan.Evergreen forests, mossy forests, thickets, bamboo thickets, onand between rocks; 600–1600 m. Guangxi, Guizhou, Hunan, Sichuan,SE Xizang, Yunnan [NE India, Myanmar, Vietnam].10. Arisaema sect. Pistillata (Engler) Nakai, Bot. Mag. (Tokyo) 43: 525. 1929.花 南 星 组 hua nan xing zuArisaema [unranked] Pistillata Engler, Pflanzenr. 73(IV. 23F): 151. 1920.Plants with tubers, paradioecious. Phyllotaxy spiro-distichous. Leaves 1 or 2; leaf blade 3-foliolate or pedately multifoliolate.