Abstract

Five species belonging to Lemnaceae family are known to grow in Siberia: Lemna gibba, L. minor, L. trisulca, L. turionifera, and Spirodela polyrhiza. Characteristics of their distribution in Siberia, bioecological characteristics, and facts of flowering and fruiting of Lemnaceae are provided in this paper. It has been shown that the generative reproduction of duckweed is not a rare phenomenon, and it is typical for all species of the family known in the region. The flowering is usually observed for L. trisulca and L. turionifera. However, some cases of flowering are known for S. polyrhiza. Almost all populations of L. gibba found in Siberia had flowering and fruiting plants. L. minor had a limited distribution in Siberia; cases of flowering are rare. The generative reproduction of duckweed is found only in freshwater bodies (0.1–0.7‰ salinity) with a water depth of 0.1–0.7 m, temperature of the surface water layer from +20 to +33°С, and pH from 5.96 to 9.30 units not obscured by tree–shrub and tall grass vegetation.

中文翻译：

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西伯利亚Lemnaceae SF Gray的开花：生物生态特征

摘要

五种属于浮萍家庭被称为西伯利亚增长：浮萍gibba，属未成年人，属trisulca，L. turionifera，和紫萍。本文提供了它们在西伯利亚的分布特征，生物生态特征以及Lemnaceae的开花结果。已经表明浮萍的生殖繁殖并不是罕见的现象，并且对于该地区已知的所有科目都是典型的。通常观察到Trisulca和L. turionifera的开花。但是，多花葡萄球菌已知有一些开花的情况。的几乎所有人口在西伯利亚发现的吉氏乳杆菌有开花和结果植物。L. minor在西伯利亚的分布有限；开花的情况很少。浮萍的生殖繁殖仅在水深为0.1–0.7 m，地表水层温度为+20至+ 33°С，pH为5.96至9.30单位的淡水体（盐度为0.1–0.7‰）中发现。不会被灌木丛和高高的草木遮盖。