""'Saccoloma " "'is a fern genus in family Saccolomataceae . " Saccoloma " species are characterized by an omega-shaped ( ? ) vascular bundle in the cross-sections of their petioles.
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The vascular bundles trifurcate at the nodes, with the central branch becoming the vein of a microphyll, and the other two moving left and right to merge with the new branches of their neighbours.
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Their vascular bundles are surrounded by two rings of cells; the inner ring, called bundle sheath cells, contains starch-rich chloroplasts lacking grana, which differ from those in mesophyll cells present as the outer ring.
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The keel along the front of the trap contains a mixture of leftward-and rightward-facing vascular bundles, as would be predicted from the fusion of the edges of an adaxial ( stem-facing ) leaf surface.
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Various pathogens can cause root rot in beets; however the black streaking on petioles and necrotic vascular bundles in roots and adjacent pink tissue help to distinguish this disease from others such as Fusarium Yellows.
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The compound is present in what is commonly referred to as the aloe latex that exudes from cells adjacent to the vascular bundles, found under the rind of the leaf and in between it and the gel.
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The vascular bundles in a eustele can be collateral ( with the phloem on only one side of the xylem ) or bicollateral ( with phloem on both sides of the xylem, as in some Solanaceae ).
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The connective tissue between young fronds, which eventually develops into a dried brown vascular bundle of rough fibre, attached to the lower edges of the midribs ensheathing the trunk, makes up a very durable tough fibre ( cf.
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The increase in vascular bundle thickness further seems to correlate with the width of plant axes, and plant height; it is also closely related to the appearance of leaves and increased stomatal density, both of which would increase the demand for water.
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2 ) Remove from the water, remove the vascular bundle from the center, squeeze some of the excess water, and then pound with a mortar ( " mtondo " in the local Malawian language chichewa ) and pestle ( " musi " ).
