The reproductive morphology of Dumontia incrassata (O. F. Müller) Lamouroux
The reproductive morphology of Dumontia incrassata (O. F. Müller) Lamouroux is described from New Hampshire, U.S.A. populations. Mature carpogonial and auxiliary branches are usually 5 and 6 celled, respectively, but both may range from 4 to 9 cells. Auxiliary branches are more numerous than carpogonial branches; however, the ratio of carpogonial to auxiliary branches increases towards the apex of the frond. A linear relationship exists between the position of the generative auxiliary cell and the number of cells in the auxiliary branches. In most cases the third cell from the top of the auxiliary branch becomes the generative auxiliary cell. The probabilities for different positions of the generative auxiliary cells are summarized. During spermatangial development, four mother cells are initially produced per cortical cell initial; subsequently, successive spermatangia are cut off obliquely and on opposite sides of each mother cell. Monoecious asexual plants of D. incrassata are described, as well as an irregular tetraspore development.
Digital Object Identifier (DOI)
Kilar, J.A. and A.C. Mathieson. 1981. The reproductive morphology of Dumontia incrassata (O.F. Muller) Lamouroux. Hydrobiologia 77:17-23. (Contribution No. 957 in the Agricultural Experiment Station Series)
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