The Botanical Review
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Allotetraploids in Patagonia with Affinities to Western North American Diploids: Did Dispersal or Genome Doubling Occur First?
The Botanical Review - Tập 78 - Trang 288-306 - 2012
Amphitropical disjunct distributions between western North America and western South America have intrigued botanists for over a century. Here, specific examples of migration and speciation are investigated using herbaceous species from the phlox family (Polemoniaceae) as a model for considering the timing of dispersal relative to speciation. Comparative DNA sequencing reveals that, in Collomia an...... hiện toàn bộ
Recent work on reproductive structures of living conifers and taxads—A review
The Botanical Review - Tập 35 - Trang 89-116 - 1969
Development and structure of the phloem tissue
The Botanical Review - Tập 5 - Trang 373-432 - 1939
The modem morphological concept of the phloem is that of a tissue containing highly specialized elongated enucleate cells with permeable cytoplasm arranged in longitudinal rows and forming anastomosing strands together with the parenchymatous members of the phloem. These specialized cells—that is, the sieve-tube elements or their counterparts—are intimately connected with each other. In most plant...... hiện toàn bộ
Hybridization in the genusCarex with special reference to North America
The Botanical Review - Tập 58 - Trang 351-438 - 1992
The first reports ofCarex hybrids in North America appeared in the middle and late 1800’s. By the early 1900’s and up to the middle 1900’s there was disagreement among the influential North American botanists regarding the extent to which hybrids existed. Those who recognized hybridization inCarex have been largely supported by recent studies, but only a small proportion of the reported hybrids ar...... hiện toàn bộ
Global Plant Ecology of Tropical Ultramafic Ecosystems
The Botanical Review - Tập 89 - Trang 115-157 - 2022
Ultramafic ecosystems are renowned for high endemism and habitat specialization. However, most of our understanding of ultramafic plant ecology comes from Mediterranean and temperate climes, raising questions about the generalizability of plant responses to ultramafic soils. This is especially apparent in tropical ultramafic ecosystems which exhibit a wide range of endemism and differentiation bet...... hiện toàn bộ
Protecting Orchids in Nature Reserves: Research and Restoration Needs
The Botanical Review - Tập 76 Số 2 - Trang 137-139 - 2010
Will installment of a few fences and rangers be sufficient to secure the rich orchid floral in an economically challenged area under the current rapidly changing environments? What are the research and restoration needs? We convened the Guangxi International Orchid Conservation Symposium in May 2009 in Leye county, a remote, rural area in southwestern China that is rich in orchids, to address thes...... hiện toàn bộ
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