Results 271 to 280 of about 107,330 (317)
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1990
Prior to research with the electron microscope, little detailed information was available on the ontogeny and structure of the sieve elements in seedless vascular plants. About all that could be said about the mature sieve-element protoplasts in this diverse group of plants was that they generally had a very clear appearance, contained variable numbers
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Prior to research with the electron microscope, little detailed information was available on the ontogeny and structure of the sieve elements in seedless vascular plants. About all that could be said about the mature sieve-element protoplasts in this diverse group of plants was that they generally had a very clear appearance, contained variable numbers
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New Divisions of Vascular Plants
Nature, 1947A widely used classification of vascular plants has recognized four divisions: Psilopsida, Lycopsida, Sphenopsida and Pteropsida1. The first three have been erected in the course of time out of Jeffrey's2,3,5,5a original Lycopsida. The fourth has not been changed from Jeffrey's2,4,5,5a original Pteropsida, and is further subdivided into Filicineae ...
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Secretory tissues in vascular plants
New Phytologist, 1988SUMMARYSecretory tissues occur in most vascular plants. Some of these tissues, such as hydathodes, salt glands and nectaries, secrete unmodified or only slightly modified substances supplied directly or indirectly by the vascular tissues. Other tissues secreting, for instance, polysaccharides, proteins and lipophilic material, produce these substances ...
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Tracheophyte Phylogeny Vascular Plants
2016The "Tracheophyte Phylogeny Poster – Vascular Plants - Systematics and Characteristics" is an educational tool presenting an overview of the evolutionary relationships among non-flowering vascular plants (lycophytes, monilophytes, and gymnosperms). The phylogenetic tree depicts the orders and families (lycophytes and monilophytes) and the genera of ...
Cole, Theodor C.H., Hilger, Hartmut H.
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Annual Review of Ecology and Systematics, 1998
▪ Abstract Morphological and molecular analyses resolve many aspects of vascular plant phylogeny, though others remain uncertain. Vascular plants are nested within bryophytes; lycopsids and zosterophylls are one branch of crown-group vascular plants, and euphyllophytes (Psilophyton, sphenopsids, ferns, seed plants) are the other.
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▪ Abstract Morphological and molecular analyses resolve many aspects of vascular plant phylogeny, though others remain uncertain. Vascular plants are nested within bryophytes; lycopsids and zosterophylls are one branch of crown-group vascular plants, and euphyllophytes (Psilophyton, sphenopsids, ferns, seed plants) are the other.
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2014
The book is the first comprehensive analysis of the macroecology and geobotany of endemic vascular plants with case-studies and analyses from different regions in the world. Endemism is a pre-extinction phenomenon. Endemics are threatened with extinction.
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The book is the first comprehensive analysis of the macroecology and geobotany of endemic vascular plants with case-studies and analyses from different regions in the world. Endemism is a pre-extinction phenomenon. Endemics are threatened with extinction.
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Engineering the multiscale complexity of vascular networks
Nature Reviews Materials, 2022Colleen E O'connor, , Ying Zheng
exaly