Variation in seed macro- and micromorphology of nine genera in Rosaceae tribe Spiraeeae, including the rare Korean endemic genus Pentactina, was examined using stereo and scanning electron microscopy to evaluate the diagnostic value of this variation for intergeneric/specific identification, and to facilitate future systematic studies. All genera in the tribe had follicles, except Holodiscus which only had achenes. Various seed morphological characteristics were identified, both among and within genera. Some characteristics (e.g. length : width ratio, texture and shape) provided useful information for taxonomic studies of Spiraeeae. Four types of testa ornamentation were recognised: Type I-a, simple reticulate (Petrophytum, Sibiraea, Spiraea and Xerospiraea); I-b, reticulate-foveate (Aruncus and Luetkea); Type II, reticulate-rugose (Holodiscus); Type III, reticulate-colliculate (Kelseya) and Type IV, striate-rugose (Pentactina). Moreover, the phenogram from a cluster analysis using UPGMA also represented four groups. Seed morphological characteristics strongly support the current molecular phylogenetic position of Pentactina as distinct from Spiraea, contrary to previous classifications. Moreover, Pentactina possessed a combination of palynological data and testa ornamentation characteristics within the Spiraeeae to confirm its generic status.

中文翻译：

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绣线菊科（扁桃科：蔷薇科）的比较种子形态

使用立体和扫描电子显微镜检查了蔷薇科部落绣线菊中9个属的种子宏观和微观形态变异，包括稀有的韩国特有的仙人掌属，以评估该变异对种间/特异性鉴定的诊断价值，并有助于将来的系统研究。学习。部落中的所有属都有卵泡，除了仅具有瘦果的Holodiscus。在属内和属内鉴定了各种种子形态特征。一些特征（例如长度：宽度比，纹理和形状）为绣线菊的分类学研究提供了有用的信息。鉴定出四种类型的睾丸装饰：Ia型，简单网状（Petrophytum，Sibiraea，绣线菊和Xerospiraea）；IB，网纹-foveate（假升麻属和Luetkea）; II型网状皱纹（Holodiscus）; III型，网状-胶状（Kelseya），IV型，纹状-皱纹（Pentactina）。此外，使用UPGMA进行聚类分析得出的物候图也代表了四组。与先前的分类相反，种子形态特征强烈支持了当前的仙人掌植物分子系统发育位置，与绣线菊不同。而且，仙人掌 具有螺旋藻科内的古生物学数据和睾丸装饰特征的组合，以确认其通用地位。