SECONDARY WALL INGROWTHS ON VESSEL ELEMENTS IN OMBROPHYTUM-SUBTERRANEUM (BALANOPHORACEAE)
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Date
1992
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Abstract
All vessel elements in the parasitic dicot Ombrophytum subterraneum (Balanophoraceae) have irregular, knobby ingrowths on their secondary walls. The ingrowths have a mean spacing of about 4-mu-m and can be longer than 6.4-mu-m, thus causing considerable occlusion of all but the widest vessel elements. The adaptive value is unknown.