《中国植物志》|| 天南星科 ARACEAE ||海芋属 Alocasia (Schott) G. Don ||箭叶海芋 Alocasia longiloba Miq.

4.箭叶海芋 图版14: 10
Alocasia longiloba Miq. , Fl. Ind. Bat. 3: 207. 1855; Engl. in DC. , Monogr. Phan. 2: 506. 1879; Hook. f., Fl. Brit. Ind. 6: 527. 1893; Engl. et Krause in Engl. , Pflanzenr. 71 (4, 23E): 103. 1920; Gagn. in Lecte. , Fl. Gen. Indo-Chine 6: 1147. 1942.
多年生上升草本；根茎圆柱形，长15-20厘米以上，粗1-1.5厘米，下部生细圆柱形须根，上部被宿存叶鞘。叶柄绿色，长25-32厘米，基部强烈扩大成鞘状，向上渐狭；叶片绿色或幼时表面淡蓝绿色；成年植株叶片长箭形，长25-45厘米，宽9-19厘米，前裂片长圆状三角形，长15-27厘米，先端渐尖，侧脉4-7，斜伸；后裂片长三角形，长10-18厘米，基部联合2-3.5厘米，弯缺锐三角形，基脉相交成60-80度的锐角。花序柄长18-25厘米。佛焰苞淡绿色，管部长2-3.5厘米，卵形至纺锤形，果时长达5厘米，粗约2厘米；檐部长圆形或披针形，长6-8厘米。肉穗花序长7-8厘米，雌花序圆柱形，长12毫米；雄花序能育部分长2厘米；附属器长4.5厘米，圆柱形，渐尖。雄花有雄蕊3。子房卵圆形，先端渐狭；柱头肾形；胚珠半直立，基生。浆果近球形，淡绿色，直径6-8毫米，内有圆球形种子1枚。果期8-10月。
分布于云南南部、广东海南，广州有栽培，海拔90-1020米，生于林下或灌丛。中南半岛、马来半岛、加里曼丹岛和印度尼西亚爪哇都有。

《云南植物志》|| 天南星科 Araceae ||海芋属 Alocasia Schott ||箭叶海芋 Alocasia longiloba Miq.

3. 箭叶海芋 图版211，11
Alocasia longiloba Miq. (1855, 1856, 1860); Engl. (1879); Hook. f. (1893); Engl. et Krause in Engl. (1920); Gagn. in Lecte. (1942).
多年生上升草本；根茎圆柱形，长15—20厘米以上，粗1-1.5厘米，下部生细圆柱形须根，上部被宿存叶柄鞘。叶柄绿色，长25—32厘米，基部强烈扩大成鞘状，向上渐狭；叶片绿色或幼时表面淡蓝绿色；成年植株叶片长箭形，长25—45厘米，宽9—19厘米，前裂片长圆状三角形，长15—27厘米，先端渐尖，侧脉4—7对，斜伸；后裂片长圆状三角形，长10—18厘米，基部联合2—3.5厘米，弯缺锐三角形，基脉相交成60—80°的锐角。花序柄长18-25厘米。佛焰苞淡绿色：管部长2—3.5厘米，卵形至纺锤形，果时长达5厘米，粗约2厘米；檐部长圆形或披针形，长6-8厘米。肉穗花序长7—8厘米；雌花序圆柱柱形，长12毫米；雄花序能育部分长2厘米；附属器长4.5厘米，圆柱形，渐尖。雄花有雄蕊3。子房卵圆形，先端渐狭；柱头肾形；胚珠半直立，基生。浆果近球形，淡绿色，直径6—8毫米，内有圆球形种子1枚，长2—4毫米。花期8—10月。
产滇南（景洪小勐养），海拔900—1200米，林下或灌丛。广东（恩平）也有。分布于越南，老挝，泰国，马来半岛，印度尼西亚的爪哇、加里曼丹。我国（云南、广东）新记录。
汁液可治家畜伤口。

《Flora of China》|| Araceae || Alocasia ||尖叶海芋 Alocasia longiloba

7. Alocasia longiloba Miquel, Fl. Ned. Ind. 3: 207. 1856.

尖叶海芋 jian ye hai yu

Alocasia amabilis W. Bull; A. cochinchinensis Pierre ex Engler & K. Krause; A. cuspidata Engler; A. lowii Hooker var. veitchii (Lindley) Engler; A. veitchii (Lindley) Schott; Caladium veitchii Lindley.

Herbs, terrestrial, small to robust, to 150 cm tall, evergreen or seasonally dormant. Stem rhizomatous, elongate, erect to decumbent, sometimes subtuberous, 8-60 × 2-8 cm. Leaves 1-3 together, subtended by lanceolate papery-membranous cataphylls; petiole terete, 30-120 cm, glabrous, sheathing in proximal 1/4, purple-brown to green, strikingly obliquely mottled chocolate-brown; leaf blade pendent, green or flushed with purple abaxially, dark green often with major venation gray-green adaxially, narrowly hastate-sagittate, 27-85 × 14-40 cm; posterior lobes peltate for (5-)10-30% of their length, acute, anterior lobe with 4-8 primary lateral veins on each side, axillary glands conspicuous, interprimary collective veins weak. Inflorescences solitary or paired; peduncle 8-18 cm, resembling petioles, subtended by cataphylls. Spathe 7-17 cm, abruptly constricted 1.5-3.5 cm from base; proximal spathe green, ovoid; limb erect, later reflexing, pale green, lanceolate, canoe-shaped, 5.5-7.5 cm. Spadix somewhat shorter than spathe, 6-13 cm, stipitate, stipe whitish, conic, ca. 5 mm; female zone 1-1.5 cm; pistil green, subglobose, 1.5-2 mm in diam.; stigma white, subsessile or on a slender style to ca. 0.5 mm, 3- or 4-lobed; sterile zone 7-10 mm, narrower than fertile zones; synandrodes mostly rhombic-hexagonal, flat-topped; male zone ivory, subcylindric, tapered at base, 1.2-2.5 cm × 4.5-8 mm; synandria 4-6-merous, ± hexagonal, ca. 2 mm in diam.; appendix pale orange, 3.5-9 cm, subcylindric, tapering to a point. Fruiting spathe glossy green, ovoid, 4-7 cm. Fruit ripening orange-red, globose-ellipsoid, ca. 1.5 × 0.75 cm. Fr. Aug-Oct.

Tropical forests, thickets; 100-1000 m. Guangdong, Hainan, S Yunnan [Cambodia, Indonesia, Laos, Malaysia, S Myanmar, Singapore, Thailand, Vietnam].