published September 9, 2011

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Renziana, a new Journal by the Swiss Orchid Foundation at the Herbarium Jany Renz

The Swiss Orchid Foundation, on the occasion of the 10th anniversary, proudly announces the publication of its new journal, Renziana, published by the Reinhardt Verlag Basel. The journal is bilingual (English and German) and will be published annually, with each issue dedicated to a particular orchid topic. At around 100 pages, and including 202 colour images, the first issue is devoted to the genus Paphiopedilum (slipper orchids). All contributors are internationally renowned experts on the genus.

The introductory articles cover the systematic position and distribution of each of the 82 accepted species, illustrated with colour photographs of the flower of each species to scale, and supplemented by habitat photographs and information on geographical distribution. This issue then covers further aspects of this orchid genus, particularly relating to its cultivation and conservation.

Paphiopedilums are among the most popular commercial orchids, and plants and cut flowers are traded throughout the world. The majority of modern trade is in artificially produced hybrids. Unfortunately, there remains a horticultural demand for the species that has led to the depredation of many natural populations, and some species are now greatly endangered. The conservation measures used to protect some species in China, home to many paphiopedilums, are discussed here. Such measures might be readily adopted by other countries to protect their endangered orchid habitats.

Paphiopedilums can be relatively easily propagated in the laboratory and the trade depends upon propagating them in quantity. Propagating species in this way can prevent natural populations from further damage. In our first issue, two experts on in-vitro and ex-vitro orchid culture present their methods and equipment used for the artificial propagated of these orchids.

A bench of seed-grown Paphiopedilum lowii at Krull-Smith orchids. © 2006 G. Allikas

A sound understanding of the development of these orchids from seed to flowering plant, their requirement in nature for a symbiotic fungus partner, their pollination, fruit development, and seed production and dispersal are covered in detail. Vegetative reproduction is also considered.

Paphiopedilum Wössner Koloniv 'Krull-Smith'
AM-CCM/AOS is an example of today's modern,
free-flowering hybrids. © 2008 G. Allikas

The magnificent and free-flowering Paphiopedilum hybrids are found in many orchid collections nowadays and remain popular in trade. The story of their development and cultivation is told from the first hybrids produced a century and a half ago to modern times. Trends in their breeding are considered and popular current lines are discussed and illustrated. In addition, the issue contains cultivation advice for orchid enthusiasts, both experienced and new to orchid growing, on how to provide optimum conditions for their tropical slipper orchids at home and in the glasshouse.

The journal may be ordered by phone from Reinhardt Media Service Tel.+41 (0) 61 264 64 50; by e-mail:; or in the booktrade ISSN: 2235-0799. The price per issue is SFr. 12.-/€ 12.- (+posting fees)