Publications

Bruce Bayer has published many articles and several books on Haworthia.

Many are available from:

Harry Mays
Editor, Alsterworthia International.
e-mail: hmays@freenetname.co.uk

 

Haworthia Handbook
Haworthia Handbook
(out of print)
National Botanic Gardens of South Africa, Kirstenbosch, Cape, 1976

 

 


The New Haworthia Handbook
(out of print)
National Botanic Gardens of South Africa, Karoo Botanic Garden, Worcester, 1982

 

 


Haworthia Revisited. A revision of the Genus
. (out of print)
Umdaus Press, Hatfield, South Africa, 1999
Well established, color-illustrated revision of the species. Hard cover. 250 pages 21 x 26 cm.

 

 


Thoughts on Haworthia. Philosophical dissertations
. (out of print)
Spiderwalk Services CC, Durbanville, Capetown, South Africa
Soft cover. 99 pages 21 x 29.5cm. 22 papers.
Variety of subjects, ICBN, USA talks, correspondence with taxonomists and others, the enigma of Haworthia etc.

.
Since Haworthia Revisited was published Bruce has made many more habitat excursions and is still making them. He has noted geographical features, geology and the wide variability of habitat plants. Many new populations have been discovered and most have been extensively photographed. As time has passed he has written up his discoveries in Updates 1-7, revised his species list as necessary and profusely illustrated populations and their variability. These photos of plants in habitat are a “herbarium” par excellence. The following detail the publications, contents and page numbers.

 

Haworthia Update Essays on Haworthia – Volume 1
Umdaus Press, Hatfield, South Africa, 1999

Foreward, Preface, Acknowledgements, Introduction  
Essay 1. Haworthia gracilis, H. cymbiformis and H. cooperi in the greater Baviaanskloof area 1-4
Essay 2. Haworthia mucronata and its new variety 5-24
Essay 3. The case of Haworthia incurvula 25-33
Essay 4. Haworthia cooperi and H. bolusii var. blackbeardiana 34-47
Eassy 5. The Haworthias of Kaboega 48-56
Essay 6. Summation – and a new solution? 57-60
Epilogue 61
References 62

 


Haworthia Update Vol. 2
.
Card cover. 165 A4 pages.

Catalyst and consequences 1
Editor’s note 2
Acknowledgement 2
Introduction  3-4
Chapter 1. The curious variability of Haworthia floribunda  4-17
Chapter 2. A population of Haworthia magnifica/maraisii  18-23
Chapter 3. Where to H. limifolia  24-44
Chapter 4. Haworthia limifolia var. arcana Smith & Crouch  45-47
Chapter 5. The White Widow Reunion – Haworthia mutica  48-49
Chapter 6. How to understand H. mutica var. nigra  50-79
Chapter 7. Continuity of Haworthia on the Zuurberg  80-86
Chapter 8. Ecotypes in Haworthia  87-97
Chapter 9. New Names and Combinations in Haworthia  98-104
Chapter 10. Small Hairy Things 105-109
Chapter 11. Some of the interplay of H. arachnoidea and H. mucronata 110-114
Chapter 12. Haworthia rossouwii VPoelln. and the demise of H. serrata Bayer 115-129
Chapter 13. A trip to Bredasdorp 130-135
Chapter 14. Explaining the name Haworthia intermedia VPoelln. and others 136-140
Chapter 15. Electron Scanning Photographs of Haworthia leaf surfaces 141-148
Chapter 16. Nectar Sugars in the Alooid minor genera and a need for another model 149-152
Chapter 17. Species and varieties listed 153-154
Chapter 18. Bayer Accessions 155-162
Index of Scientific Names and Maps 163-165

 

 


Haworthia Update Vol. 3
.
Card cover. 167 A4 pages.

Chapter 1. Haworthia mirabilis, and the interface with Haworthia maraisii 1-87
Chapter 2. Flowers of some Haworthias  88-91
Chapter 3. Alooideae – Asphodelaceae and the genera thereof 92-96
Chapter 4. Classification with purpose  97-104
Chapter 5. Something about new Haworthias  105-110
Chapter 6. Review of the annotated checklist for Haworthia – Strelitzia 14  111-113
Chapter 7. Some thoughts on recent literature of the Alooideae (Asphodelaceae)  114-118
Chapter 8. Review of World of Haworthias, Vol. 2  119-122
Chapter 9. A response to Paul Forster’s review of “Haworthia Revisited”  123-127
Chapter 10. “Rocks of Ages” – Another review  128-131
Chapter 11. Haworthia as a problem genus – 34 years on  132-134
Chapter 12. Plant classification – a sociology of ignorance?  135-139
Chapter 13. Haworthia IS confusing  140-156
Chapter 14. A population of Haworthia heidelbergensis  157-161
Chapter 15. The Super Species Proposal  165-167

 

 


Haworthia Update Vol. 4
.
Card cover. 108 A4 pages.

Introduction 1  
That squadron of Haworthias from Albertinia eastwards 2-28
A glimpse of the super-species H. nortieri 29-60
More new things and ideas in Haworthia 61
Some variation in Haworthia mirabilis var. sublineata 62-77
What did I learn yesterday? 78-79
Credulity stretched 80-82
The brutality of the reality of Haworthia 83-86
Closer to closure 87
Closure 87
Post closure Bruce Bayer 88-91
Appendices (Some relevant older articles which may have escaped the eye.)  
Haworthias – small relatives of aloes 92-97
Variation in Haworthia with particular reference to Haworthia glauca 98-101
Haworthia and Nomenclatural Confusion 102-105
Index of scientific names 106-107
About Alsterworthia International 108
Haworthia Study – journal of the Japanese Haworthia Society 108

 

 


Haworthia Update Vol. 5
.
Card cover. 199 A4 pages.

Part 1  
Chapter 1. Winding down on Haworthia 1-2
Chapter 2. Haworthia Reality Check 3-4
Chapter 3. Haworthia deglamorized. A recapitulation 5-18
Chapter 4. Haworthia retusa 19-38
Chapter 5. Haworthia mirabilis 39-70
Chapter 6. Haworthia floribunda 71-83
Chapter.7. Haworthia minima 84-90
Plant and other colour photographs index 90-91
Part 2  
Chapter 8. An extension of H. rossouwii 92-95
Chapter 9. More on H. floribunda and H. mirabilis 96-101
Chapter 10. Haworthia ‘enigma’ and H.. mutica var. nigra 102-128
Chapter 11. What is Haworthia schoemanii? 129-132
Chapter 12. More on H. venosa ‘granulata’ 133-138
Chapter 13. A February 2009 miscellany 139-166
Chapter 14. Haworthia jakubii – another new species? 167-169
Chapter 15. A view of Haworthia marumiana ‘dimorpha’ 170-181
Chapter 16. New populations of Haworthia chloracantha, H. parksiana and H. kingiana 182-191
Haworthia species list – Bruce Bayer Feb 22nd 2009 192-193
Acknowledgements 194
Plant and other colour photographs index 195-196
Haworthia Study 196
Haworthia Books by Bruce Bayer, Ingo Breuer & Dr. M. Hayashi 197
Alsterworthia International 198-199

 


Haworthia Update Vol. 6
.
Card cover. 104 A4 pages.

Introduction 1
Haworthias and Chameleons 2-9
Towerlands. Haworthia retusa ‘turgida’ 10-13
Still more about Haworthia on Kaboega 14-22
Haworthia emelyae and some of its variants 23-40
Haworthia emelyae ‘major’ and multifolia. New populations 41-53
Die Nekkies and Biomes and Haworthia maculata 54-67
Taking Haworthia cooperi further – Kliprivier 68-73
A fleeting look at H. arachnoidea 74-86
Interesting nursery plants 87-89
Non-pilose “pilosa” 90-95
North and Northwest of the Potberg 96-100
A look at Aloe haworthioides 101-102
Plant index 103-104

 

 

 

Haworthia Update Vol. 7.
A4 size, printed on A3 paper, folded and stapled.
250 pages in 4 parts. Part 1 has over 330 photos, Part 2 over 280, Part 3 over 330 and Part 4. over 160.

Part 1  
Chapter 1 – Haworthia retusa ‘nigra’ – Another grand finale 2-61
Part 2  
Chapter 2 – Further exploration in Haworthia. Further to finale  2-29
Chapter 3 – A field trip to the Potberg area  30-83
Part 3  
Chapter 4 – What is typical Haworthia mutica?  1-4
Chapter 5 – Still more Haworthia mutica and Haworthia mirabilis  5-23
Chapter 6 – Field trip to Van Reenes Crest and Niekerkshek  24-57
Part 4  
Chapter 7 – More on Haworthia mirabilis and H. mutica from east of Bredasdorp  1-29
A rationalization of names in Haworthia, A list of species with new combinations and new synonyms by M.B. Bayer and J.C. Manning.  30-40

 

Haworthia Update Vol. 8.
A4 size, printed on A3 paper, folded and stapled. 68 pages.

Plant Names – a word of warning iii
Haworthia flowers – some comments as a character source 1
Overview 1
1. The Plants 2-18
2. The Raceme 19-21
3. The Bracts 21
4. The Buds 22-23
5. The Flowers 24-43
6. The Capsules 44-46
7. The Seeds 46-47
Discussion and Conclusion 48-49
Appendix 1 – Haworthia flowers – some comments as a character source 50-55
Appendix 2 56-58
Appendix 3 59-61

 

 

Haworthia Update Vol. 9.

A4 size, printed on A3 paper, folded and stapled. 58 pages.

A myth corrected to Haworthia maculata var. livida (Bayer) Bayer  and flowers ignored 1-51
Conclusion & Acknowledgement 52
My view of names 53-54