摘要
四种荞麦的花被片脉迹数目是不同的。齿翅野荞麦只有一条大的主脉迹,侧脉是二歧状;苦荞花被片通常具有3条脉迹;甜养与金荞麦有3～5条脉迹,侧迹连成网结状。四种荞麦均具有8个花内蜜腺。苦荞的密腺最小,显黄绿色。其余三种荞麦的蜜腺呈黄色,以甜荞的蜜腺最大。苦荞与齿翅野生荞麦的花,雄蕊与雌蕊近等长,而甜荞与金荞麦的花是花柱异长的两型花,一类植株上的花全是长雄蕊短花柱,另一类植株上的花全是短雄蕊长花柱的花。荞麦的瘦果呈三棱形、具翅或无翅。齿翅野荞麦的果壁比其他三种荞麦薄。
The number of tepal trace is various on four kinds of fagopyrum. Tepals of F. gracilipes var. odontopteum have one large trace only, commonly its lateral traces are dichtomous, 3-traces present in F. tataricum, 3-5 traces present in F. esculeatum and F. cymosum.The flowers of the studied Fagopyrum have eight floralnectaries. The nectaries are commonly yellow, but F. tataricum is greenyellow. The stamens are as long as pistil in flowers of F. tataricum and F. gracilipes var. odontopteum, and heterostyly presents in F. esculentum and F. cymosum, the flowers of one part of plants with long stamens and short style; the other part of plants with short stamens and long style. The achene of the studied Fagopyrum is triangular, wing or wingless. Fruit wall of F. gracilibes var. odontopteum is thiner than the others.
出处
《贵州农业科学》
CAS
1992年第6期32-36,共5页
Guizhou Agricultural Sciences
基金
贵州农科院资助课题的基础研究
关键词
荞麦属
生殖器官
形态学
Fagopyrum
reproductive organs
tepal trace
heterodistyly
