Seed coat anatomy ofCrossostylis (Rhizophoraceae): its evolutionary and systematic implications
- 41 Downloads
The seed coat structure of all 13 species ofCrossostylis was studied to contribute to an understanding of species delimitation and relationships within the genus. The mature seed coat is relatively uniform and consistently constructed mainly by a well-developed exotesta and a well-developed fibrous exotegmen. The species differ in the thickness of the exotesta and exotegmen, the anatomy of exotestal cells, the presence and absence of persistent mesotesta, and so forth. On the basis of comparisons of these characters, close relationships are suggested in the species groups such as:Crossostylis banksiana andC. cominsii; C. biflora, C. raiateensis andC. multiflora; C. gandiflora, C. sebertii andC. imera; and five species in the Fiji Islands. These relationships except for those of Fijian five species are also supported by cladistics as their common characters are evaluated as synapomorphy. Species-level separation ofC. banksiana, C. pedunculata andC. raiateensis each from the closest species is doubted based on the results of seed coat structure.
Key wordsCrossostylis Evolution Rhizophoraceae Seed Seed coat
Unable to display preview. Download preview PDF.
- Brongniart, M.H.A., andA. Gris. 1870. Diverses plantes Nouvelles ou peu connues de la Nouvelle-Calédonie. Ann. Sc. Nat. Ser. 5,13: 340–404.Google Scholar
- Corner, E.J.H. 1976. The Seeds of Dicotyledons. vol. 1 and 2. Cambridge Univ. Press, Cambridge.Google Scholar
- Guillaumin, A. 1931. Contribution to the flora of the New Hebrides. J. Arnold Arb.12: 221–264.Google Scholar
- Hou, D. andC.G.G.J. van Steenis. 1963.Crossostylis.In C.G.G.J. van Steenis, ed., Pacific Plants Areas. Vol. 1, pp. 290–291. Manila Bureau of Printing, Manila.Google Scholar
- Moore, J.W. 1963. Notes on Raiatean flowering plants. Bishop Mus. Bull.226: 1–36.Google Scholar
- Smith, A.C. 1952. Studies of pacific island plants, XI. Further notes on Fijian flowering plants. J. Arnold Arb.33: 97–118.Google Scholar
- — 1981. Flora Vitiensis Nova. Vol. 2. Pacific Tropical Botanical Garden, Lawai.Google Scholar