lugardon bernard (7 risultati)

Soft cover. Condizione: Very Good. B & W Photos (illustratore). Copyright Date: 1972 Octavo, B & W Photos, PP.227-261, Inscribed by author. Inscribed by Author(s).

StapleBound. Condizione: Very Good/NO DUSTJACKET. Black & White Photos & Illus. (illustratore). Vienna, VA: American Fern Society. Very Good/NO DUSTJACKET. 2001. . StapleBound. Quarterly Journal of the American Fern Society; "Special Issue, The Evolution and Diversification of the Lycopods. Proceedings of a Symposium Held August 1999â¦" . Sm 4to., pages 73-177, cover light shelf wear to edges and corners, corners lightly bumped, small scuffed soil marks to top edges, spine lightly faded, few light fox spots (?) to spine, otherwise very good; edges of text block very lightly foxed, otherwise pages clean and unmarked. .

Condizione: New. In.

Hardcover. Condizione: Fine. Condizione sovraccoperta: No Dust Jacket. First Edition. The original hardback edition in fine condition; 648 pages, b/w illustrations. Original green cloth binding with black lettering, fine with minimal wear only. Contents clean and tight, no inscriptions; slight binding fault to rear end paper, otherwise unmarked. A fine tight copy. Size: 28.5 x 22cm. Book.

Paperback. Condizione: Brand New. reprint edition. 648 pages. 11.00x8.25x1.50 inches. In Stock.

Taschenbuch. Condizione: Neu. This item is printed on demand - it takes 3-4 days longer - Neuware -Pteridophyte spores, the main agent of dispersal carrying the essential genet ic material for sexual reproduction of plants and persistence of the species, are single, airborne cells with complex walls. Palynological records of these spores supply stratigraphic data and evidence of early diversification of vas cular plants, as well as testimony of climatic and vegetational changes. Compared to the extensive work on pollen, there are relatively few mod ern studies on development and structure of pteridophyte spore walls. This survey provides a source of original information on these spores, pertinent descriptive characteristics, and related commentary. Studies of sporogenesis and ultrastructure utilizing the electron microscopes have greatly contributed to our knowledge of the development, structure, and variation of spore walls of the Pteridophyta. The synopsis of wall development and structure in the introductory section-New Concepts on Sporoderm Development and Ultra structure-supplies a comparative review of spores in the Pteridophyta. Source of Material Studied The spores are largely from collections in the Harvard University Herbarium (Gray Herbarium and Arnold Arboretum), except as indicated in the cap tions. We are grateful to the directors and curators of these and the follow ing institutions for permission to examine specimens included in the work: Herbarium ]utlandicum, Botanical Institute, University of Aarhus, Den mark; Queensland Regional Station, C. S. I. R. O. 664 pp. Englisch.

Condizione: New. Dieser Artikel ist ein Print on Demand Artikel und wird nach Ihrer Bestellung fuer Sie gedruckt. 1.Ophioglossaceae.- 1. Botrychium.- 2. Helminthostachys.- 3. Ophioglossum.- 2.Marattiaceae.- 4. Angiopteris.- 5. Protomarattia.- 6. Christensenia.- 7. Archangiopteris.- 8. Marattia.- 9. Danaea.- 3.Osmundaceae.- 10. Osmunda.- 11. Todea.- 12. Leptopteris.- 4.