The latter is covered by the indusium griseum, a thin sheet of rudimentary cortex containing the delicate medial and lateral longitudinal striae. |
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A sorus may be protected during development by a scale or flap of tissue called an indusium. |
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Leaf morphology, as well as sorus and indusium shapes, is extremely variable. |
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Two pairs of medial and lateral longitudinal striae of white matter are embedded within the gray matter of the indusium, creating four fine ridges. |
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Loss of indusium, dimorphism, areolate venation, and reduced blade dissection have occurred repeatedly along many evolutionary lines in Dryopteridaceae. |
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Yesilyurt segregated this species based on its filiform segments, pinnate division, and crenulate indusium margins. |
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Specimens collected from different seasons were checked to ensure the stability of indusium characters. |
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The originally undifferentiated filaments become entrapped in a cup-shaped indusium which triggers their differentiation into akinetes. |
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Leaf morphology is extremely variable, but most commonly the sori are round and often covered with a membranous protective flap of tissue called an indusium. |
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