SOME ascidial stalks of Clerodendron infortunatum described earlier 1 contain a few vascular bundles which are concentric—some amphivasal and others amphicribral in structure. The amphivasal vascular ...
IN the lorises, most of the principal blood vessels of the limbs become complex vascular bundles formed by a linear arrangement of many more or less parallel arteries and veins. In cross-section these ...
Research by Assistant Professor Jacob S. Suissa at the University of Tennessee, Knoxville, is revealing complexity in how ferns have evolved. Instead of the vascular structure inside fern stems ...
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