长花龙血树Dracaena angustifolia Roxb.
长花龙血树Dracaena angustifolia Roxb.
3. 长花龙血树 槟榔青（海南）图版53: 2-4
Dracaena angustifolia Roxb., Fl. Ind. ed. 2, 2: 155. 1832; Matsumura et Hay; in Journ. Coll. Sci. Univ. Tokyo. 22: 438. 1906; Gagnep. in Fl. Gener. Indo-Chine 6: 798. 1934.
灌木状，高1-3米。茎不分枝或稍分枝，有疏的环状叶痕，皮灰色。叶生于茎上部或近顶端，彼此有一定距离，条状倒披针形，长20-30 (-45) 厘米，宽1.5-3 (-5.5) 厘米，中脉在中部以下明显，基部渐窄成柄状，有时有明显的柄，柄长2-6厘米。圆锥花序长30-50厘米；花序轴无毛；花每2-3朵簇生或单生，绿白色；花梗长7-8毫米，关节位于上部或近顶端；花被圆筒状，长19-23毫米；花被片下部合生成筒，筒长7-8毫米，裂片长11-16毫米；花丝丝状，花药长2-3毫米；花柱长为子房的5-8倍。浆果直径约8-12毫米，桔黄色，具1-2颗种子。花期3-5月，果期6-8月。
产广东（海南岛）、台湾（高雄、台南）和云南（河口）。生于海拔较低的林中或灌丛下干燥的沙土上。东南亚广泛分布。
《Flora of China》 Vol. 24 (2000)
Dracaena angustifolia Roxburgh
长花龙血树 chang hua long xue shu
Pleomele angustifolia (Roxburgh) N. E. Brown.
Plants shrubby, rhizomatous, 1--3 m tall. Stems simple or few branched; internodes often longer than wide; bark grayish, smooth. Leaves spaced along distal part of stems, subsessile or indistinctly petiolate; petiole to 1 cm, base not completely covering internode; leaf blade nearly sword-shaped to linear-oblanceolate, 20--45 × 1.5--5.5 cm. Inflorescence terminal, branched, 30--50 cm; rachis glabrous. Flowers in clusters of 2 or 3; pedicel 7--8 mm, articulate distally or near apex. Perianth greenish white, 1.9--2.3 cm; tube 7--8 mm; lobes 1.1--1.6 cm. Filaments filiform; anthers 2--3 mm. Style 5--8 × as long as ovary. Berry orange, globose, 0.8--1.2 cm in diam., 1- or 2-seeded. Fl. Mar--May, fr. Jun--Aug. 2 n = 40.
Forests, thickets. Hainan, S Taiwan (including Lan Yu), S Yunnan [Bhutan, Cambodia, India (including Andaman Islands), Indonesia, Laos, Malaysia, Myanmar, Papua New Guinea, Philippines, Thailand, Vietnam; N Australia].
Dracaena menglaensis G. Z. Ye (in G. Z. Ye et al., Acta Bot. Yunnan. 14: 30. 1992) was described from two collections from the same locality in S Yunnan (Mengla Xian). It is said to differ from D. angustifolia in its longer, sword-shaped leaves with bases completely covering internodes, perianth lobes tinged reddish purple distally, and 3-ribbed berry with 4 small, apical projections. However, in all other features, it falls within the range of variation of D. angustifolia and is probably best regarded as a robust plant of that species.
别名：槟榔青;狭叶龙血树;蕃仔林投;狭叶岩棕;番仔林投;马骝蔗树;龙血树;马骝萨树;
科名：龙舌兰科 Agavaceae
属名：龙血树属 Dracaena
3. 长花龙血树 槟榔青（海南）图版53: 2-4
Dracaena angustifolia Roxb., Fl. Ind. ed. 2, 2: 155. 1832; Matsumura et Hay; in Journ. Coll. Sci. Univ. Tokyo. 22: 438. 1906; Gagnep. in Fl. Gener. Indo-Chine 6: 798. 1934.
灌木状，高1-3米。茎不分枝或稍分枝，有疏的环状叶痕，皮灰色。叶生于茎上部或近顶端，彼此有一定距离，条状倒披针形，长20-30 (-45) 厘米，宽1.5-3 (-5.5) 厘米，中脉在中部以下明显，基部渐窄成柄状，有时有明显的柄，柄长2-6厘米。圆锥花序长30-50厘米；花序轴无毛；花每2-3朵簇生或单生，绿白色；花梗长7-8毫米，关节位于上部或近顶端；花被圆筒状，长19-23毫米；花被片下部合生成筒，筒长7-8毫米，裂片长11-16毫米；花丝丝状，花药长2-3毫米；花柱长为子房的5-8倍。浆果直径约8-12毫米，桔黄色，具1-2颗种子。花期3-5月，果期6-8月。
产广东（海南岛）、台湾（高雄、台南）和云南（河口）。生于海拔较低的林中或灌丛下干燥的沙土上。东南亚广泛分布。
《Flora of China》 Vol. 24 (2000)
Dracaena angustifolia Roxburgh
长花龙血树 chang hua long xue shu
Pleomele angustifolia (Roxburgh) N. E. Brown.
Plants shrubby, rhizomatous, 1--3 m tall. Stems simple or few branched; internodes often longer than wide; bark grayish, smooth. Leaves spaced along distal part of stems, subsessile or indistinctly petiolate; petiole to 1 cm, base not completely covering internode; leaf blade nearly sword-shaped to linear-oblanceolate, 20--45 × 1.5--5.5 cm. Inflorescence terminal, branched, 30--50 cm; rachis glabrous. Flowers in clusters of 2 or 3; pedicel 7--8 mm, articulate distally or near apex. Perianth greenish white, 1.9--2.3 cm; tube 7--8 mm; lobes 1.1--1.6 cm. Filaments filiform; anthers 2--3 mm. Style 5--8 × as long as ovary. Berry orange, globose, 0.8--1.2 cm in diam., 1- or 2-seeded. Fl. Mar--May, fr. Jun--Aug. 2 n = 40.
Forests, thickets. Hainan, S Taiwan (including Lan Yu), S Yunnan [Bhutan, Cambodia, India (including Andaman Islands), Indonesia, Laos, Malaysia, Myanmar, Papua New Guinea, Philippines, Thailand, Vietnam; N Australia].
Dracaena menglaensis G. Z. Ye (in G. Z. Ye et al., Acta Bot. Yunnan. 14: 30. 1992) was described from two collections from the same locality in S Yunnan (Mengla Xian). It is said to differ from D. angustifolia in its longer, sword-shaped leaves with bases completely covering internodes, perianth lobes tinged reddish purple distally, and 3-ribbed berry with 4 small, apical projections. However, in all other features, it falls within the range of variation of D. angustifolia and is probably best regarded as a robust plant of that species.