《中国植物志》|| 胡椒科 PIPERACEAE ||胡椒组 Sect. Piper ||海南蒟 Piper hainanense Hemsl.

10．海南蒟（海南植物志）图版9：8-11
Piper hainanense Hemsl. in Journ. Linn. Soc. Bot. 26: 365. 1891; Merr. in Lingnan Sci. Journ. 5: 58. 1927; Groff in Lingnan Sci. Journ. 11: 89. 1923; Metcalf, Fl. Fukien 36. 1942; 陈焕镛等, 海南植物志1: 333. 图165. 1946; Tseng in Acta Phytotax. Sinica 17 (1) : 27. 1979.——Piper flagelliforme Yamam. in Contrib. Fl. Kainan. 1: 21. 1943.
木质藤本，除花序轴外无毛；枝有细纵纹，直径2-4毫米。叶薄革质，卵状披针形或椭圆形，长7-12厘米，宽3-5厘米，顶端短尖至尾状渐尖，基部圆或阔楔形，呈不明显的微凹，凹缺之宽度通常狭于叶柄之宽度，腹面光亮，背面被白粉霜；叶脉5条，稀7条，均自基出，最内1对基部与中脉平行紧贴，至离基约1厘米处与中脉成锐角作弧形上升；叶柄长1-3.5厘米；叶鞘长为叶柄之半或稍过之。花单性，雌雄异株，聚集成与叶对生的穗状花序。雄花序长7-12厘米或更长，直径约1.5毫米；总花梗长1-2厘米; 苞片倒卵形至倒卵状长圆形，长约为宽的2倍（长约1.5毫米，宽约0.8毫米），盾状，表面有腺点；雄蕊3-4枚，花丝短。雌花序长8-15厘米，于果期延长有时可达22厘米；总花梗与雄株的相同；花序轴被毛; 苞片长圆形或倒卵状长圆形，长为宽的3倍（长3-3.5毫米，宽约1毫米），腹面贴生于花序轴上，边缘分离，盾状；子房倒卵形，无柄，柱头4。浆果纺锤形，表面有疣状凸起，长约5毫米，直径约3.5毫米。花期3-5月。
产于广东南部（茂名、徐闻、海南）及广西南部至西南部（钦州、东兴、宁明、龙州）。生于密林或疏林中，攀援于树上或石上。模式标本采自广东海南。

《Flora of China》|| Piperaceae || Piper ||海南蒟 Piper hainanense

11. Piper hainanense Hemsley in F. B. Forbes & Hemsley, J. Linn. Soc., Bot. 26: 365. 1891.

海南蒟 hai nan ju

Piper flagelliforme Yamamoto.

Climbers woody, glabrous except for rachis, dioecious. Stems 2-4 mm thick, finely furrowed. Petiole 1-3.5 cm; leaf blade ovate-lanceolate or elliptic, 7-12 × 3-5 cm, thinly leathery, drying gray-green, abaxially glaucous, adaxially shiny, base rounded or broadly cuneate, inconspicuously cordate, sinus usually narrower than petiole, apex usually acuminate, occasionally ± acute; veins 5(-7), apical pair arising up to 1 cm above base, others ± basal. Spikes leaf-opposed. Male spikes 7-12 cm × ca. 1.5 cm or longer; peduncle 1-2 cm; bracts obovate to obovate-oblong, ca. 1.5 × 0.8 mm, peltate, glandular. Stamens 3 or 4; filaments short. Female spikes 8-15 cm, to 22 cm in fruit; peduncle as in male spikes; rachis pubescent; bracts oblong or ovate-oblong, adnate to rachis, 2-3.5 × 0.8-1 mm, margin free. Ovary obovoid, sessile; stigmas 4, lanceolate, reflexed, persistent. Drupe ± fusiform, ca. 4-5 × 2.7-3.5 mm, minutely tuberculate to rugulose. Fl. Mar-May.

* Forests, on rocks or trees; 100-900 m. S Guangdong, S to SW Guangxi, Hainan