Download PDF by Professor Dr. Karl Ulrich Kramer, P. S. Green (auth.),: Pteridophytes and Gymnosperms

By Professor Dr. Karl Ulrich Kramer, P. S. Green (auth.), Professor Dr. Karl Ulrich Kramer, P. S. Green (eds.)

This encyclopedia deals entry to the variety of ferns and seed crops, an important teams of eco-friendly land crops. on hand info of basic and systematic relevance is synthesized on the point of households. proof from nearly all disciplines vital to fashionable taxonomy makes the paintings a most useful resource of reference not just for taxonomists, yet for all who're attracted to a few of the facets of plant range. A revised class encompasses a whole stock of genera in addition to their diagnostic positive factors, keys for identity, and references to the literature.

The first quantity offers with pteridophytes and gymnosperms.

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Amer. Fern J. 74 : 9-13. Hickey, R. J. 1986 a. On the identity of Isoetes triquetra A. Braun. Taxon 35: 243-246. Hickey, R. J. 1986 b. The early evolutionary and morphological diversity of Isoetes, with descriptions of two new neotropical species. Syst. Bot. 11: 304-321. Hickey, R. J. 1986 C. Isoetes megaspore surface morphology : nomenclature, variation and systematic importance. Amer. Fern J. 76: 1-16. Jerrny, A. , Schelpe E. A. C. L. E. 1986. Isoetaceae. In: Schelpe E. A. C. L. E. ) The Pteridophyta of southern Africa.

But the idea of a certain degree of affinity to ferns gained some ground (e. g. Tryon and Tryon 1982), also because of similarity in spore structure (Lugardon 1973, 1979). The Ps. diverge, however, too far from ferns to be included in this class and merit recognition as a class in its own right (Wagner in White 1977). Fig. 4 A-F. Psilotaceae. A, B Psi/alum complanatum. A Part KEY TO TH E GENERA. 8) ; B Dehisced sporangium (x 12). C, D Tmesipteris truncata. 1). D Dehisced sporangium (x 12). E, F Tmesipteris sp.

Bierhorst, D. W. 1956. Observations on the axial appendages in the Psilotaceae. Phytomorphology 6: 176-184. Bierhorst, D. W. 1968. On the Stromatopteridaceae (fam. ) and on the Psilotaceae. Phytomorphology 18: 232- 268. Bierhorst, D. W. 1969. On Stromatopteris and its ill-defined organs. Amer. 1. Bot. 56: 160-174. Bierhorst, D. W. 1973. Non-appendicular fronds in the Filicales. Bot. 1. Linn. Soc. 67 Suppl. 1: 45 - 57. Braithwaite, A. F. 1986. Tmesipteris in Vanuatu (New Hebrides). Fern Gaz. 13: 87 -96.

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