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- W2000360887 abstract "AbstractRecent collections of cystocarpic Dasyphila plumarioides Yendo from the Great Barrier Reef, northeastern Australia, include the first records of its female gametophytes and have confirmed placement of the species in the genus Dasyphila, as predicted by several authors on the basis of vegetative, tetrasporangial, and spermatangial features. Common to both D. plumarioides and the type species of the genus, D. preissii Sonder, are (1) an alternating sequence of distichous lateral branches borne on terete main axes and separated by one to six axial cells; (2) six periaxial cells that are cut off in a staggered sequence, the second and third forming on alternate sides of the first, the fourth apparently forming opposite to the first, and the fifth and sixth forming on alternate sides of the fourth; (3) growth of a single determinate branchlet from each periaxial cell; (4) dense axial cortication composed of branched, basipetally directed rhizoids initiated on the basal cells of whorl branchlets; (5) a direct connection that forms between the foot cell and the fertile axial cell after the cutting off of the gonimoblast initial; (6) carposporophytes composed of several globular gonimolobes borne on clavate basal cells with long tapering tails; (7) carposporophytes surrounded by involucres of filaments derived from whorl-branchlets of several axial cells proximal to the fertile axial cell; (8) subterminal cystocarps on lateral branches; and (9) both spermatangia and tetrahedrally divided tetrasporangia borne terminally on rachises and pinnae of whorl-branchlets. Differences between D. plumarioides and D. preissii include (1) the former’s less robust thallus and smaller overall size; (2) its two- to three-times (vs three- to four-times) pinnate branching; (3) its far less dense investment of whorl-branchlets on primary axes and lateral branches; (4) the greater lengths and more regular pinnation of its two lateral whorl-branchlets in comparison to the four minor ones (as opposed to the equal development and irregularly pinnate branching of all six whorl-branchlets); and (5) its stoloniferous rather than discoid base. Considerations of anatomy and biogeography seem to support Wollaston’s suggestion that closest affinities of the Dasyphileae are more likely to be with the Crouanieae than with the Ptiloteae." @default.
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- W2000360887 date "1997-03-01" @default.
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- W2000360887 title "The taxonomy of Dasyphila plumarioides (Ceramiaceae, Rhodophyta)" @default.
- W2000360887 doi "https://doi.org/10.2216/i0031-8884-36-2-138.1" @default.
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