| 词汇 | fern |
| 释义 | fern noun[ C ] uk /fɜːn/ us /fɝːn/ a green plant with long stems, leaves like feathers, and no flowers蕨;蕨类植物 Danita Delimont/Gallo Images/GettyImages Common plants African violet agave aloe aloe vera alpine strawberry dianthus dichondra dieffenbachia dill weed dracaena loganberry maidenhair fern maize mandrake mare's tail sorrel sotol sow thistle Spanish moss spearmint All around grew a mass of feathery ferns such as hide and nestle in cool places, and up to Robin's nostrils came the tender odor of the wild thyme, that loves the moist verges of running streams. Ferns and roses are very susceptible to injury, and fumigation if attempted at all should be performed with great caution. I first collected ferns under a crag in a deep glen. Some had fern leaves plainly visible upon their surfaces and others showed leaves of trees and shrubs. We crept along the side of a torrent among exquisite trees, moss, and ferns, till we came to a place where it divided. fern | American Dictionaryfern noun[ C ] us/fɜrn/ a green plant with long stems, wide, thin leaves, and no flowers Examples of fernfern Horsetails and ferns are a monophyletic group and the closest living relatives to seed plants. These taxa comprise cycads, lycopods and ferns (although not all ferns are restricted to humid settings). The species composition and the numbers of individuals and species of oribatid mites in the litter were affected by the size of the ferns. Elements of the local mire vegetation, fern spores and other palynomorphs were not included in the pollen sum. Both white mangrove and leather fern can become dominant in disturbed areas, which may explain their increased representation. The resulting channel bars will have provided more extensive areas of clastic substrates, which will have favoured the fern-pteridosperm complex. In the ferns, this evidence can be enhanced by additional data from reproductive organs. Understorey plants were not identified to species, but were categorized as herbs, ferns, herbaceous vines, palms, t rees and lianas. We have tried to evaluate the cost-effectiveness of the bare soil practice, starting from a soil occupied by a thick cover of ferns. Out of this subset, we randomly selected 20 ferns from which to make water collections. The meandering facies generally have greater abundance of liverworts and ferns (that is, moisture loving forms). The macroscopic forms of aquatic vegetation denoted as aquatic macrophytes include macroalgae, some species of ferns and angiosperms inhabiting a wetland. Environmental triggers of fertility are discussed and phenological patterns are compared with ferns and angiosperms from other habitats. This suggests that epiphytes should have a greater opportunity to establish on angiosperm trees than on tree ferns. Its objective is to examine whether fungal and fern spores can survive the harsh environmental conditions in space during a long-term stay. These examples are from corpora and from sources on the web. Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors. |
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