The floral organogenesis and development of Delavaya toxocarpa Franch. （Sapindaceae） were studied trader scanning electron microscope and light microscope to determine its systematic position within Sapindaceae. Flo...The floral organogenesis and development of Delavaya toxocarpa Franch. （Sapindaceae） were studied trader scanning electron microscope and light microscope to determine its systematic position within Sapindaceae. Flowers arise in terminal thyrses. The sepal primordia initiate in a spiral （2/5） sequence, which are not synchronous. The five petal primordia initiate almost synchronously and alternate with sepal primordia. Eight stamens initiate almost simultaneously and their differentiation precedes that of the petals. The last formed petal and one stamen initiate from a common primordium. Mature stamens curve inwards and cover the ovary in bud. The gynoecium begins as a hemispheric primordium on which two carpellary lobes arise simultaneously. Later in development a single gynocium is formed with two locules and two ovules per locule. Floral morphology suggests a closer affinity with Sapindaceae, although certain features of floral ontogenesis are similar to those observed in certain members of the former Hippocastanaceae, such as Handeliodendron.展开更多
1886年Franchet描述并发表茶条木Delavaya toxocarpa,他引用了Delavay所采集的标本(J. M. Delavayn. 903).我们对原始文献考证发现,这些标本包括了采于不同时期的花期及果期材料,包括了两份以上的标本,但作者在发表该名称时没有明确指...1886年Franchet描述并发表茶条木Delavaya toxocarpa,他引用了Delavay所采集的标本(J. M. Delavayn. 903).我们对原始文献考证发现,这些标本包括了采于不同时期的花期及果期材料,包括了两份以上的标本,但作者在发表该名称时没有明确指定其中的一份标本作为模式标本,因此,很有必要对其进行后选模式标本指定.为此,我们根据墨尔本国际植物学命名法规9.2和9.11,为其指定了后选模式标本.展开更多
基金supported by South China Botanical Garden, Chinese Academy of Sciences.
文摘The floral organogenesis and development of Delavaya toxocarpa Franch. （Sapindaceae） were studied trader scanning electron microscope and light microscope to determine its systematic position within Sapindaceae. Flowers arise in terminal thyrses. The sepal primordia initiate in a spiral （2/5） sequence, which are not synchronous. The five petal primordia initiate almost synchronously and alternate with sepal primordia. Eight stamens initiate almost simultaneously and their differentiation precedes that of the petals. The last formed petal and one stamen initiate from a common primordium. Mature stamens curve inwards and cover the ovary in bud. The gynoecium begins as a hemispheric primordium on which two carpellary lobes arise simultaneously. Later in development a single gynocium is formed with two locules and two ovules per locule. Floral morphology suggests a closer affinity with Sapindaceae, although certain features of floral ontogenesis are similar to those observed in certain members of the former Hippocastanaceae, such as Handeliodendron.
文摘1886年Franchet描述并发表茶条木Delavaya toxocarpa,他引用了Delavay所采集的标本(J. M. Delavayn. 903).我们对原始文献考证发现,这些标本包括了采于不同时期的花期及果期材料,包括了两份以上的标本,但作者在发表该名称时没有明确指定其中的一份标本作为模式标本,因此,很有必要对其进行后选模式标本指定.为此,我们根据墨尔本国际植物学命名法规9.2和9.11,为其指定了后选模式标本.
