ThCe actus Explorer The first free on-line Journal for Cactus and Succulent Enthusiasts 1 Travels in Southwest USA 2 River Canyon, Namibia Number 21 3 Cacti near Moquegua, Peru ISSN 2048-0482 4 Echinopsis aurea March 2018 5 Important Library Sale The Cactus Explorer ISSN 2048-0482 Number 21 March 2018 IN THIS EDITION Regular Features Articles Introduction 3 A Monograph of Harrisia 14 News and Events 4 How many Gymnos are there? 21 A Library for Sale 11 Cacti near Moquegua, Peru 23 In the Glasshouse 12 Fish River Canyon, in southern Namibia 26 On-line Journals 15 Ledebouria socialis 31 The Love of Books 18 To Belen for Toumeya’s Sake 32 Succulents on a Plate 19 Travel with the Cactus Expert (20) 51 Society Pages 58 Plants and Seeds for Sale 63 Books for Sale 69 Cover Picture: Escobaria vivipara near Sedona, Arizona. Photograph by Denis Diagre. See his article about exploring for cacti in the American southwest on page 32 . The No.1 source for on-line information about cacti and succulents is http://www.cactus-mall.com The best on-line library of cactus and succulent literature can be found at: https://www.cactuspro.com/biblio/en:accueil Invitation to Contributors Please consider the Cactus Explorer as the place to publish your articles. We welcome contributions for any of the regular features or a longer article with pictures on any aspect of cacti and succulents. The editorial team is happy to help you with preparing your work. Please send your submissions as plain text in a ‘Word’ document together with jpeg or tiff images with the maximum resolution available. A major advantage of this on-line format is the possibility of publishing contributions quickly and any issue is never full! We aim to publish your article quickly and the copy deadline is just a few days before the publication date. There will usually be three issues per year, published when sufficient material is available. Please note that advertising and links are free and provided for the benefit of readers. Adverts are placed at the discretion of the editorial team, based on their relevance to the readership. Publisher: The Cactus Explorers Club, Briars Bank, Fosters Bridge, Ketton, Stamford, PE9 3BF U.K. The Cactus Explorer is available as a PDF file downloadable from www.cactusexplorers.org.uk The Editorial Team: Organiser:Graham Charles [email protected] Paul Hoxey [email protected] This issue published on Zlatko Janeba [email protected] 6 March 2018 Martin Lowry [email protected] Opinions expressed in the articles are those of the authors, and not necessarily those of the editorial team. ©The Cactus Explorer may be freely distributed whilst the copyright of the text and pictures remains with the authors and photographers. Permission is required for any use other than reading, printing or storage. 2 Number 21 March 2018 ISSN 2048-0482 The Cactus Explorer INTRODUCTION The Best Time of the Year? As we look forward to the longer, warmer The winter had not been extreme until this days, it is time to buy seeds. You will find last week when we had lots of snow and days adverts for many suppliers starting on page 63 , of cold temperatures. As usual at this time, I but remember that specialist societies are a have had enough of winter and look forward good source of inexpensive seeds. Extensive to waking up my cacti and succulents in the lists are also offered by the major Societies and glasshouse. it is one of the benefits of joining your national society or one specialising in your favourite The last few months have been the chance to plants (see pages 58-62 ). get on with activities that get left during the busy growing season. My priority has been to I am surprised that I don’t get asked to get on with my book about Matucana and include more free adverts from hobbyists in Cactus Explorer Oroya that I have been working on for some the pages of the . What time. happens to all the seed that is distributed? I would have expected that lots of spare My objective has been to see all the species seedlings are raised which could be sold or in habitat and get digital pictures of them in exchanged. And what about those species you flower. This has proved to be quite difficult have always wanted to own? You are most because the flowering time of matucanas is welcome to place an advert for your ‘wants’ as rather unpredictable and appears to depend on well. the rainfall. This edition sees the offer of an extensive I felt fairly sure that M. haynei flowered in library for sale. You can download lists of what the Peruvian autumn and winter so I had is available from the links on page 11 or at the planned to visit last April. However, due to an foot of this page. This is a chance to get some El Niño event, the summer rains had been rarely offered books and prints for your own destructive and continued later than usual, cactus library. Many items of literature are resulting in damaged roads forcing me to extremely rare but, because the demand is postpone my visit. So, I plan to go this year relatively small, the prices are affordable. By and give myself the chance to get the last few coincidence, the Weinmann prints I talk about pictures I need. in the ‘ Succulents on a Plate ’ feature on page 19 The last few months have seen the passing are both available for sale from this library! of a number of prominent people in our hobby, Please consider contributing an article or most of whom I knew personally, so I report something for one of the regular features to the their loss with a particularly heavy heart. You next issue of the Cactus Explorer , which I can find short obituaries to some of them on hope to publish around September. page 9 . As I write this I hear that Lee Miller has died. Lee was Secretary of the American Have a good growing season, Society and I travelled with him on the two Graham Charles South American CSSA trips for which I acted as a botanical guide. He shared my love of books so we we had some interesting chats An important Library for Sale after our days in the field. There is more information on page 11 but here are the links to download the lists: If you have not already told me and would like to be advised when each issue of the Excel list of Books, Trade catalogues, Cactus Explorer is available for down - Journals, Separates and Post Cards. load, please send me your E-mail address to be added to the distribution list. MS Word illustrated list of separate plates. 3 Number 21 March 2018 rer ISSN 2048-0482 The Cactus Explo S NEWS AND EVENT 018 ly 2 national n ter i nd is in s s a t ear r 25 y a exists for M lready s zine a u ga n t s ma rd o c Thi anda a high st C ologically K a techn U “ printing is of ium recognised. Its r. 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