Download Phylogeny and Classification of the Orchid Family by Robert L. Dressler, Kerry Dressler PDF

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By Robert L. Dressler, Kerry Dressler

Recipient of the 1994 Henry Allan Gleason Award of the recent York Botanical backyard, this significant publication delimits numerous significant normal teams in the orchids, suggesting components that want additional learn by way of botanists.Published at $49.95 Our final copies on hand at $24.98

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Isbn10 | asin : 0931146240 print isbn13 : 9780931146244 ebook isbn13 : 9780585356013 language : English subject Orchids--Classification, Orchids--Phylogeny. 15/012 subject : Orchids--Classification, Orchids--Phylogeny. Page 3 Phylogeny and Classification of the Orchid Family Robert L. ) All rights reserved. W. , 1927- Phylogeny and classification of the orchid family / Robert L. Dressler.  cm. Includes bibliographical references and index.  Title. 15'012dc20 92-24390 CIP Page 5 Contents 1. Introduction 7 2.

2-2A, FK). In other cases the inflorescence is lateral from the side or base of the shoot, or from the rhizome. In the monopodial growth habit, of course, it is always lateral. Sometimes the inflorescence is condensed and the flowers are produced one by one from a very short rachis, as in Epidendrum nocturnum, Systeloglossum, Bromheadia, and Thrixspermum (Fig. 2-8E). The flowers may also be produced simultaneously, or nearly so, in a very dense cluster, as in Elleanthus or Glomera. Each flower of the genus Sigmatostalix arises not from a single bract but from a cluster of bracts, which Page 27 may represent a branch of a more complex inflorescence that has been condensed (F).

The creeping, horizontal stems of the Goodyerinae are called rhizomes, but there is Page 19 usually not a sharp distinction between the rhizome and the aerial shoot in that group. There is no distinct rhizome in orchids with a monopodial habit of growth, and there may be none in sympodial orchids with creeping, climbing, or pendant growth if the new shoots do not arise from the bases of older shoots. The term "secondary stem," found in many taxonomic descriptions, seems to refer to the vegetative shoot above the rhizome, but this use is inaccurate and confusing.

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