Saturday, May 31, 2014

Passport: Hoyas of the World, Vol 1~9

Hoyas Of The World

Species Files
First Edition September, 2001
Updated August 2007

Volume I ~ Volume IX

As usual this work was not completed without the help and cooperation of a large number of friends. The most important contribution has been from those who over the years have sent me flowers for microscopic study. This has been a continuous flow of material. Among those who have filled the gaps in my collections are Ted Green and Edward Gilding of Hawaii. Ann Wayman of Oregon, Jerry Williams, Harriette Schapiro of California. Eva-Karin Wiberg and Torill Nyhuus of Sweden and David Kleijn of The Netherlands. I have also received flowers from Chanin Thorut, Thailand and many others. Another contribution has been Photos of foliage and of flower clusters, mainly supplied by Ann Wayman, Central Point, Oregon.

Over the years the personnel at the herbarium UC Berkeley, University of California have assisted me with access to herbarium sheets and literature. I must also add thanks to Dr. Domingo Madulid and the late Professor Juan Pancho of the Philippines for their help and guidance, as well as access to the respective herbaria. The list of assistance over the past 22 years is too long to enumerate here. Help has been supplied from many quarters and it has been accepted with much appreciation.
All those acknowledged in my work on “Hoya Pollinaria a Photographic Study” and in the book “The World of Hoyas a Pictorial Guide” are hereby thanked again as all this work is intertwined and overlapping.

Volume I:  .pdf document
Volume II:  .pdf document
Volume III: (1) .pdf document(2) .pdf document
Volume IV:  .pdf document
Volume V:  .pdf document
Volume VI:  .pdf document
Volume VII:  .pdf document
Volume VIII:  .pdf document
Volume IX:  .pdf document

 updated: June 2014
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Wednesday, May 21, 2014

Alphabetical Compilation

Hoya Species

An Alphabetical Compilation

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Tuesday, May 20, 2014

Fraterna: June 2014, Vol 2 Issue 2

A .pdf publication devoted to the Genus Hoya

ISSN 2329-7336

Volume 2 Issue 2
June 2014
Editor:  Dale Kloppenburg

The following new species are presented in PDF format with ISSN number.
1. Hoya blashernaezii Kloppenburg subsp. valmayoriana Kloppenburg, Guevarra & Carandang 2013.
2. Hoya mindorensis Schlechter 1906 subsp. erythrostemma Kerr 1939.
3. Eriostemma seidenschwarzii Kloppenburg.
4. Hoya ranauensis T. Green & D. Kloppenburg.
5. Eriostemma davaoensis Kloppenburg.
6. Eriostemma suluensis Kloppenburg.

View .pdf document:  click here

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Samoan Hoya Species

The present study was undertaken with the cooperation of Dr. Art Whistler of the University of Hawaii. He kindly sent me his collection of Herbaria sheets which form the major basis for the following detailed study. He also sent me a collection of photo slides taken of the hoya species as they were collected and studied by him in Samoa. My tendency is to look at all the details of a plant and not to gloss over characters I feel may be important in delineating species. I have observed after years of collecting that most species are limited to small areas and to rather narrow elevation and environmental niches. Suffice it to say there are a few species, which are widely adapted and have a broad variability (cline). Even these broadly distributed hoya species seem to be confined to specific elevations. Because of my observations, these habitat patterns are uppermost in my considerations and I am slow to lump materials unless specific data shows otherwise. I have also found that the type descriptions in particular become eroded, expanded and denigrated over time. Many later descriptions are in direct contradiction to earlier Type descriptions and yet this later material is often used in citing synonymies.

I have discussed under “Materials and Methods” some of the difficulties in photographing these very small structures. There is a loss of resolution and detail at every step of the process in bringing this work to publication. I suppose we all wish for more money, better equipment, and above all more time. The expenses and time of all this work is borne by me personally. Many thousands of negatives and pictures have been filed and labeled. These form the data base for this and further studies. I feel a photographic record is invaluable, since at any time I can refer back to the actual photo. I continually re-photograph species so I am able to study any variations occurring over time. In addition, clones bloomed in many locations are added to the photographic and data record on a continuing basis, along with drawings and critical measurements. With the advent of computers it is easy to make necessary corrections and additions to a data base and to then from time to time release updated publications.

Finally it is much more difficult to work with herbarium material than it is with fresh material especially the flowers. There is slight differences in measurements that occur between in vitro and in vivo material. One also cannot see the overall presence that a living plant presents. All we have on a herbarium sheet is a stem laid flat, there is no conveyance of vigor, whether it clumps, dangles, twines, rambles, creeps or many of the other distinct character a live plant conveys. The field observation is a far superior method in determining hoya species than attempting to do the same from herbarium sheets. Actually a combination of these to methods is almost essential to getting it right!

Use corresponding document page numbers to find features listed in Table of Contents:
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