L. However, drupelets that will not germinate because of higher salinities can recover and germinate after about 2 weeks in fresh water. These drupelets are very drought-resistant. Experiments on the germination and growth of wigeongrass from mild climates illustrate the plant's rather complicated life strategy there. Thus, in nature, drupelets from plants produced from drupelets that germinate at low spring temperatures probably will easily germinate during the summer in places with sufficient oxygen because habitat temperatures will then be near optimum. Drupelets that settle in poorly-oxygenated bottoms will lie dormant until the following year.
Animals also influence germination.
Asexual Reproduction Ruppia maritima s.l. also colonizes by rhizomes. Rapid growth of rhizomes on overwintering plants begins about the same time as drupelet germination and, like germination, is probably temperature controlled. Colonies reach maximum development during July or August in temperate climates. Spring and fall growth peaks occur in subtropical polyhaline estuaries. Floating fragments of wigeongrass grow roots freely at the nodes, sink, and attach to the bottom.