勐仑翅子树Pterospermum menglunense Hsue
勐仑翅子树Pterospermum menglunense Hsue
7. 勐仑翅子树（植物分类学报）
Pterospermum menglunense Hsue in Acta Phytotax. Sinica 15 (1): 81. fig.3. 1977.
乔木，高12米，嫩枝被灰白色短绵毛。叶厚纸质，披针形或椭圆状披针形，长4.5-12.5厘米，宽1.5-4.8厘米，顶端长渐尖或尾状渐尖，基部斜圆形，上面无毛或略被稀疏的短柔毛，下面密被淡黄褐色星状茸毛；叶柄长3-5毫米。花单生于小枝上部的叶腋，白色；小苞片长锥尖状，全缘，长6毫米；花梗长约5毫米；萼片5枚，条形，长3.5-3.8厘米，宽2.5毫米，外面密被黄褐色星状茸毛，内面无毛；花瓣5片，倒卵形，白色，长3厘米，宽8毫米，顶端钝并具小的短尖突，基部渐狭成瓣柄、两面均无毛；雌雄蕊柄长8毫米，无毛；退化雄蕊5枚，长1厘米，无毛，雄蕊每3枚集合成群并与退化雄蕊互生，比退化雄蕊略短；子房卵形，密被淡黄褐色茸毛，长约4毫米。蒴果长椭圆形，长约8厘米，顶端急尖，基部变窄并与果柄连接，果柄长1-2厘米；种子连翅长约3.5厘米。花期4月。
产云南南部西双版纳勐仑。生于石灰岩山地疏林中。
《Flora of China》 Vol. 12 (2007)
Pterospermum menglunense H. H. Hsue
勐仑翅子树 meng lun chi zi shu
Trees, to 12 m tall. Branchlets shortly gray-white woolly when young. Petiole 0.3-0.5 cm; leaf blade lanceolate or elliptic-lanceolate, 4.5-12.5 × 1.5-4.8 cm, thickly papery, abaxially densely yellowish brown stellate velutinous, adaxially glabrous or minutely sparsely puberulent, base obliquely rounded, apex long acuminate or caudate-acuminate. Flowers solitary, subterminal; pedicel ca. 0.5 cm; epicalyx lobes long-pointed, entire, ca. 6 mm. Sepals linear, 3.5-3.8 × ca. 0.25 cm, abaxially densely yellow-brown stellate tomentose, adaxially glabrous. Petals white, obovate, ca. 3 × 0.8 cm, glabrous, base tapering into narrow stalk, apex obtuse with acumen. Androgynophore ca. 8 mm, glabrous. Stamens slightly shorter than staminodes; staminodes ca. 1 cm, glabrous. Ovary ovoid, ca. 4 mm, densely yellowish brown tomentose. Capsule narrowly ellipsoid, ca. 8 cm, base tapering into 1-2 cm stipe, apex acute. Seeds ca. 3.5 cm including wing. Fl. Apr.
● Monsoon forests on limestone hills. S Yunnan (Xishuangbanna).
Pterospermum menglunense, though found within a protected area, is still treated as "Critically endangered" in the IUCN Red List because of the very small, fragmented population.
别名：勐[山/仑]翅子树;勐（山/仑）翅子树;
科名：梧桐科 Sterculiaceae
属名：翅子树属 Pterospermum
7. 勐仑翅子树（植物分类学报）
Pterospermum menglunense Hsue in Acta Phytotax. Sinica 15 (1): 81. fig.3. 1977.
乔木，高12米，嫩枝被灰白色短绵毛。叶厚纸质，披针形或椭圆状披针形，长4.5-12.5厘米，宽1.5-4.8厘米，顶端长渐尖或尾状渐尖，基部斜圆形，上面无毛或略被稀疏的短柔毛，下面密被淡黄褐色星状茸毛；叶柄长3-5毫米。花单生于小枝上部的叶腋，白色；小苞片长锥尖状，全缘，长6毫米；花梗长约5毫米；萼片5枚，条形，长3.5-3.8厘米，宽2.5毫米，外面密被黄褐色星状茸毛，内面无毛；花瓣5片，倒卵形，白色，长3厘米，宽8毫米，顶端钝并具小的短尖突，基部渐狭成瓣柄、两面均无毛；雌雄蕊柄长8毫米，无毛；退化雄蕊5枚，长1厘米，无毛，雄蕊每3枚集合成群并与退化雄蕊互生，比退化雄蕊略短；子房卵形，密被淡黄褐色茸毛，长约4毫米。蒴果长椭圆形，长约8厘米，顶端急尖，基部变窄并与果柄连接，果柄长1-2厘米；种子连翅长约3.5厘米。花期4月。
产云南南部西双版纳勐仑。生于石灰岩山地疏林中。
《Flora of China》 Vol. 12 (2007)
Pterospermum menglunense H. H. Hsue
勐仑翅子树 meng lun chi zi shu
Trees, to 12 m tall. Branchlets shortly gray-white woolly when young. Petiole 0.3-0.5 cm; leaf blade lanceolate or elliptic-lanceolate, 4.5-12.5 × 1.5-4.8 cm, thickly papery, abaxially densely yellowish brown stellate velutinous, adaxially glabrous or minutely sparsely puberulent, base obliquely rounded, apex long acuminate or caudate-acuminate. Flowers solitary, subterminal; pedicel ca. 0.5 cm; epicalyx lobes long-pointed, entire, ca. 6 mm. Sepals linear, 3.5-3.8 × ca. 0.25 cm, abaxially densely yellow-brown stellate tomentose, adaxially glabrous. Petals white, obovate, ca. 3 × 0.8 cm, glabrous, base tapering into narrow stalk, apex obtuse with acumen. Androgynophore ca. 8 mm, glabrous. Stamens slightly shorter than staminodes; staminodes ca. 1 cm, glabrous. Ovary ovoid, ca. 4 mm, densely yellowish brown tomentose. Capsule narrowly ellipsoid, ca. 8 cm, base tapering into 1-2 cm stipe, apex acute. Seeds ca. 3.5 cm including wing. Fl. Apr.
● Monsoon forests on limestone hills. S Yunnan (Xishuangbanna).
Pterospermum menglunense, though found within a protected area, is still treated as "Critically endangered" in the IUCN Red List because of the very small, fragmented population.