Beeplants South of Africa Sources of nectar, pollen, honeydew and propolis honeybees for M.F. Johannsmeier TRELITZIA 37 Beeplants of South Africa Sources of nectar, pollen, honeydew and propolis for honeybees M.F. Johannsmeier P.O. Box 39007, Faerie Glen, Pretoria 0043, South Africa SANBI f % BiodiversityforLife SouthAfrican National BiodiversityInstitute Pretoria 2016 T R E L IT Z A I Thisseries has replaced Memoirs ofthe BotanicalSurveyofSouthAfrica andAnnals ofthe Kirstenbosch Botanic Gardens which SANBI inherited from its predecessor organisations. The plant genus Strelitzia occurs naturally in the eastern parts of southern Africa. It comprises three arbores- cent species, known as wild bananas, and two acaulescent species, known as crane flowers or bird-of-paradise flowers. The logo ofthe South African National Biodiversity Institute is partly based on the striking inflorescence ofStrelitzia reginae, a native ofthe Eastern Cape and KwaZulu-Natal that has become a garden favourite world- wide. It symbolises the commitmentofthe Institute to champion the exploration, conservation, sustainable use, appreciation and enjoymentof South Africa's exceptionally rich biodiversity for all people. Beeplants of South Africa Sources of nectar, pollen, honeydew and propolis for honeybees M.F. Johannsmeier (Project coordinator: Carol Poole) SCIENTIFIC & TECHNICAL EDITOR: Yolande Steenkamp PROOFREADER: Alicia Grobler DESIGN & LAYOUT: Sandra Turck COVER DESIGN: Sandra Turck Citingthis publication JOHANNSMEIER, M.F. 2016. BeeplantsofSouthAfrica. Sourcesofnectar, pollen, honeydewand propolisforhoneybees. Strelitzia 37. South African National Biodiversity Institute, Pretoria. ISBN: 978-1-928224-17-4 © Published by: South African National Biodiversity Institute. Obtainable from: SANBI Bookshop, Private Bag X101, Silverton, 0184 South Africa. Tel.: -E27 12 843 5000 E-mail: [email protected] Website: www.sanbi.org All rights reserved. No partofthis bookmaybe reproduced in anyformwithoutwritten permission ofthecopyrightowners. Theviewsand opinionsexpressed do not necessarily reflectthoseofSANBI. Theauthorand publisher have madetheir best effortsto preparethis book, and make no representation orwarrantiesofany kind with regardtothecompletenessoraccu- racyofthecontentsherein.All imagesinthisbookhavebeen reproducedwiththe knowledgeand priorconsentoftheartists and photographersconcerned and no responsibility isaccepted bythe publisheror printerforany infringementofcopyright or otherwise arisingfrom the contents ofthis publication. Every effort has been made to ensure thatthe credits accurately complywith the information supplied bythe authors. TRELITZIA 37 (2016) iii This publication contributes to the outcomes of the Global Pollination Project and the Honeybee Forage Project, both implemented by the South African National Biodiversity Institute (SANBI). The Global Pollina- tion Project (Conservation and Management of Pollinators for Sustainable Agriculture through an Ecosystem Approach) was implemented in seven countries - Brazil, Ghana, India, Kenya, Nepal, Pakistan and South Af- rica. The project was executed by the Food and Agriculture Organization ofthe United Nations, with financing from the Global Environment Facility (GEF) and implementation support from the United Nations Environment Programme (UNEP). The Honeybee Forage Projectwasa national project in South Africa funded bythe Working for Water Programme, Environment Programmes, and the Departmentof Environmental Affairs. environmentalafeirs UNEP ERnEiPWUTexUnCMOIfSOUTHAfWCA EXPANDEDPUBLICWORKSPROGRAMME CONTRIBUTINGTOANATIONATWORK trelitzia 37 2016 V ( ) Contents Foreword vi Introduction 1 Crop Plants 7 1 . 2. Eucalypts 51 3. Other Trees 71 4. Large Shrubs 147 5. Small Shrubs 223 Weeds 343 6. 7. Bulbous Plants 387 8. Annuals and Biennials 405 9. Grasses 427 Acknowledgements 437 General beeplant literature and aids to identification 439 References 442 Index to common and scientific names 446 trelitzia VI 37 (2016) Foreword tisthe roleofthe SouthAfrican National Biodiversity Institute (SANBI), charged by national governmentthrough Ithe National Environmental Management: Biodiversity Act of 2004, to monitor the state of our biodiversity and the services it delivers, and provide policy advice based on good science. As such, SANBI was pleased to become the implementing agent of the GEF/UNEP/FAO Global Pollination Project, in which seven countries took part. The project aimed to provide sound policy and practical advice about sustain- ing the pollination services to our agricultural sector. As the project progressed in South Africa, the role of the managed honeybee as a pollinator became everclearer. While an important partofour indig- enous biodiversityand ecosystem functioning, thetwo subspeciesof the honeybee found in South Africa are also absolutely vital to our agricultural industry. Without honeybees, our world would be avery different place: fewer food choices and more expensive agricultural production. Despite this dependence, and the shocking statistics of colony losses in the northern hemisphere, very little scienceand pol- icy exists about South Africa's native honeybees. SANBI therefore decided to undertake the urgent research of what ecological infra- structure underpinsthe managed honeybee industry in South Africa and therefore ultimately supports a sustainable pollination service to 'Without honeybees, our agriculture. world would be a very while the pollinator-dependent crop grower is reliant on the bee- keeper for the pollination service his honeybees provide to the differentplace: fewer food crops during the short flowering season, the beekeepers in turn are choices and more expensive reliant on numerous and variable forage sources and habitats that can sustain their honeybee colonies throughoutthe year. The Hon- agriculturalproduction... eybee Forage Project, funded by the Department of Environmental Affairs through SANBI's Invasive Species Programme, created lists of but what ecological the plantspecies importantto beekeepers in various regions in South ... Africa and studied the relative importance ofvarious indigenous and infrastructure underpins the exotic plant species as vital forage resources at various times of the managed honeybee industry year. The project also linked directly to Mr Martin Johannsmeier as he completed this extensive work on the BeeplantsofSouth Africa- in South Africa?' the firstcomprehensive reviewofplants utilised by honeybeesacross the country. As a result ofthe SANBI projects and MrJohannsmeier's years of re- search, we have a broad understanding of honeybee forage needs and resources in South Africa. This understandingcan now be used to develop management programmes forex- isting forage resources and to develop planting programmes that might result in new forage resources becoming available to beekeepers. This book will assist beekeepers, farmers and gardeners with more information about plants they can consider utilising, conserving or growing, and will assist practitioners to consider the bee-value of plant resources as partofenvironmental impact assessments or rehabilitation projects. We also hope thatthis book is valuable to many other audiences into the future as we learn to protect and grow our honeybee forage resources sustainably. Dr Tanya Abrahamse Chief Executive Officer South African National Biodiversity Institute