论文部分内容阅读
乐东拟单性木兰(Parakmerialotungensis)是木兰科中的姣姣者,是近年园林绿化部门首选的高档绿化美化树种。同时,它还是我国特有种,对研究木兰科植物系统发育和分类上,具有重要的学术价值。已收入《中国植物红皮书》,列为濒危种。形态特征常绿乔木,高达30米,胸径90厘米,树皮灰白色;当年生枝绿色;叶革质;花杂性,雄花两性花异株;聚合果卵状长圆形或椭圆状卵圆形,很少倒卵形,长3～6厘米;种子椭圆形或椭圆状卯圆形,外种皮红色,长7～12毫米,宽6～7毫米。据笔者观察:去掉外种皮的种子灰黑褐色。单粒种(蓇葖内仅1粒种)肾形,长5～8毫米,宽10～15毫米;双粒种(蓇葖内2粒
Parakmerialotungensis is one of the best in Magnoliaceae and is the first choice of high-grade landscaping tree species in landscaping departments in recent years. At the same time, it is endemic to China and has important academic value for studying the phylogeny and classification of Magnoliaceae. Has been included in the “Chinese Red Book”, as endangered species. Morphological characteristics Evergreen trees, up to 30 meters, diameter at breast height 90 cm, bark gray-white; year branches green; leaf leathery; flowers hybrid, male flowers bisexual flowers heteromorphic; fruit oval oblong or oval-shaped oval, rarely Obovate, 3 to 6 cm long; seeds oval or oval-shaped drupe, outer seed coat red, 7 to 12 mm long, 6 to 7 mm wide. According to the author’s observation: remove the seed coat gray gray-brown. Single species (only one species in 蓇 肾) kidney-shaped, 5 to 8 mm long, 10 to 15 mm wide; two species