Abstract

Amaranthaceae s.lat. is a stenopalynous family showing, in contrast, a considerable phenotypic diversity for macromorhological characters. A total of one quantitative and seven qualitative characters were reviewed in an attempt to assess their taxonomic implications. The presence of unique shape class, pore membrane sculpturing, anulopunctate tectum and pore borders clearly distinguished the subfamilies Amaranthoideae and Gomphrenoideae (Amaranthaceae sensu stricto) from the rest of the subfamilies of Amaranthaceae s.lat. Metareticulate exines are present exclusively in the subfamily Gomphrenoideae, in one genus of the subfamily Corispermoideae and encountered in one species – belonging to subfamily Polycnemoideae. Pore numbers although reported as a useful diagnostic feature, showed considerable intra-specific variation. The two basic pollen-types (Amaranthus-type and Gomphrena-type) within the subfamilies Amaranthoideae and Gomphrenoideae are quite distinct and gained broad acceptance, whereas the pollen types investigated for the rest of the subfamilies (belonging to Chenopodiaceae) are diverse and intricate. With the exception of Anthochlamys-type (related to Gomphrena-type), it was noticed that either members of one type constitute members of different subfamilies, or members of the same subfamily were scattered in different pollen-types, highlighting difficulties in recognising distinctive pollen-types in these subfamilies. The pollen-types within the subfamilies Betoideae, Camphrosomoideae, Chenopodioideae, Corispermoideae, Salicornioideae, Salsoloideae, Suaedoideae and Polycnemoideae are diverse and do not support their differentiation. Members of the subfamily Polycnemoideae share similarities with Amaranthaceae s.str. rather than members of the family Chenopodiaceae.

摘要

苋科 s.lat. 是一个狭窄的家族，相比之下，大形态特征具有相当大的表型多样性。共审查了一个定量特征和七个定性特征，以评估它们的分类学意义。独特的形状类别、孔膜雕刻、环状顶盖和孔边界的存在清楚地区分了苋科和苋菜亚科（Amaranthaceae sensu stricto ）) 来自苋科 s.lat 的其余亚科。网状外壁仅存在于 Gomphrenoideae 亚科、Corispermoideae 亚科的一个属中，并在一个物种中遇到——属于 Polycnemoideae 亚科。孔数虽然被报告为有用的诊断特征，但显示出相当大的种内变异。Amaranthoideae 和 Gomphrenoideae 亚科中的两种基本花粉类型（Amaranthus型和Gomphrena型）非常不同并获得了广泛接受，而对其余亚科（属于藜科）研究的花粉类型则多种多样且复杂。除了Anthochlamys型（与Gomphrena相关）-type），人们注意到一种类型的成员构成不同亚科的成员，或者同一亚科的成员分散在不同的花粉类型中，突出了在这些亚科中识别独特花粉类型的困难。Betoideae、Camphrosomoideae、Chenopodioideae、Corispermoideae、Salicornioideae、Salsoloideae、Suaedoideae 和 Polycnemoideae 亚科中的花粉类型多种多样，不支持它们的分化。Polycnemoideae 亚科的成员与 Amaranthaceae s.str 有相似之处。而不是藜科的成员。