The Succulent Euphorbieae (Southern Africa).
Author: Alain Campbell White
Publisher:
Published: 1941
Total Pages: 0
ISBN-13:
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Author: Alain Campbell White
Publisher:
Published: 1941
Total Pages: 0
ISBN-13:
DOWNLOAD EBOOKAuthor:
Publisher:
Published: 1941
Total Pages:
ISBN-13:
DOWNLOAD EBOOKAuthor: Alain C. White
Publisher:
Published: 1941
Total Pages:
ISBN-13:
DOWNLOAD EBOOKAuthor: Peter V. Bruyns
Publisher: Springer Nature
Published: 2022-07-18
Total Pages: 481
ISBN-13: 3030494020
DOWNLOAD EBOOKThis book presents a new account of Euphorbia in southern Africa. Euphorbia is the second largest genus of plants in the world. Southern Africa enjoys a high diversity in Euphorbia and 170 species occur here naturally. Of these 170 species, 128 or 74% are endemic. Where most species of Euphorbia in the northern hemisphere are herbs or shrubs, most of those in southern African are succulent. These succulents range from small, almost geophytic forms where the tuber is larger than the above-ground parts to huge trees 6 to 15 m or more in height. Many of them are spiny. There are also small numbers of herbaceous species in southern Africa and many of these are also dealt with here. The last account of the succulent species for southern Africa was published in 1941 and much new data has accumulated since then. Our understanding of the relationships of the species in Euphorbia has also been greatly enhanced by recent analyses of DNA-data, which led to new and unexpected results. From this new information an entirely new classification was developed, in which Euphorbia was divided into four subgenera. This provides the taxonomic framework for the presentation of our species here. Around ten new species have been described and these are presented in detail for the first time. This monograph is made up of two volumes. Volume 1 contains an extensive introductory chapter with an overview of the genus in the region, emphasizing many of its important and distinctive features. This is followed by Chapter 2, which deals with subgenus Athymalus. Of the four subgenera, this one is by far the most diverse in southern Africa, with 80 species. Volume 2 contains Chapters 3 (subg. Chamaesyce, 34 species), 4 (subg. Esula, 11 species) and 5 (subg. Euphorbia, 45 species), as well as an additional Chapter 6 covering the remarkable diversity of subg. Euphorbia in Moçambique. Each of Chapters 2 to 5 includes a key to all the species, followed by an account of each of them. This account includes synonymy, a description, data on distribution and habitat, line-drawings of floral features and other diagnostic details, notes on how the species is distinguished from its closest relatives and a brief history of its discovery. Several colour photographs are included for each species, illustrating its habitat, vegetative habit and flowering features, demonstrating key points distinguishing it from others and often showing its variability. Euphorbia is an important component of the vegetation in many of the drier parts of southern Africa. This book is based on a thorough evaluation of the vast herbarium record for southern African members of Euphorbia, on the extensive field-work conducted in the region and the wide taxonomic experience of the author. It is believed that both the professional botanist and the layman will find much that is new and informative in this monograph.
Author: Peter V. Bruyns
Publisher: Springer Nature
Published: 2022-07-14
Total Pages: 515
ISBN-13: 3030493997
DOWNLOAD EBOOKThis book presents a new account of Euphorbia in southern Africa. Euphorbia is the second largest genus of plants in the world. Southern Africa enjoys a high diversity in Euphorbia and 170 species occur here naturally. Of these 170 species, 128 or 74% are endemic. Where most species of Euphorbia in the northern hemisphere are herbs or shrubs, most of those in southern African are succulent. These succulents range from small, almost geophytic forms where the tuber is larger than the above-ground parts to huge trees 6 to 15 m or more in height. Many of them are spiny. There are also small numbers of herbaceous species in southern Africa and many of these are also dealt with here. The last account of the succulent species for southern Africa was published in 1941 and much new data has accumulated since then. Our understanding of the relationships of the species in Euphorbia has also been greatly enhanced by recent analyses of DNA-data, which led to new and unexpected results. From this new information an entirely new classification was developed, in which Euphorbiawas divided into four subgenera. This provides the taxonomic framework for the presentation of our species here. Around ten new species have been described and these are presented in detail for the first time. This monograph is made up of two volumes. Volume 1 contains an extensive introductory chapter with an overview of the genus in the region, emphasizing many of its important and distinctive features. This is followed by Chapter 2, which deals with subgenus Athymalus. Of the four subgenera, this one is by far the most diverse in southern Africa, with 80 species. Volume 2 contains Chapters 3 (subg. Chamaesyce, 34 species), 4 (subg. Esula, 11 species) and 5 (subg. Euphorbia, 45 species), as well as an additional Chapter 6 covering the remarkable diversity of subg. Euphorbia in Moçambique. Each of Chapters 2 to 5 includes a key to all the species, followed by an account of each of them. This account includes synonymy, a description, data on distribution and habitat, line-drawings of floral features and other diagnostic details, notes on how the species is distinguished from its closest relatives and a brief history of its discovery. Several colour photographs are included for each species, illustrating its habitat, vegetative habit and flowering features, demonstrating key points distinguishing it from others and often showing its variability. Euphorbia is an important component of the vegetation in many of the drier parts of southern Africa. This book is based on a thorough evaluation of the vast herbarium record for southern African members of Euphorbia, on the extensive field-work conducted in the region and the wide taxonomic experience of the author. It is believed that both the professional botanist and the layman will find much that is new and informative in this monograph.
Author: Alain White
Publisher:
Published: 1941
Total Pages:
ISBN-13:
DOWNLOAD EBOOKAuthor: Alain Campbell White
Publisher:
Published: 1941
Total Pages: 552
ISBN-13:
DOWNLOAD EBOOKAuthor: Gideon Smith
Publisher: Penguin Random House South Africa
Published: 2011-11-05
Total Pages: 325
ISBN-13: 1920544186
DOWNLOAD EBOOKFeaturing 250 of the region’s most common and interesting succulents, this is an accessible, user-friendly guide to identifying these increasingly popular plants. Colour photographs vividly portray all the species covered. Authoritative text describes key identification features, and distribution maps show the occurrence of each species in southern Africa. This guide will have wide appeal both to naturalists and to the gardening public who, increasingly, are on the lookout for indigenous, low-maintenance and waterwise plants.
Author: Doreen Court
Publisher: CRC Press
Published: 2000-06-01
Total Pages: 318
ISBN-13: 9789058093233
DOWNLOAD EBOOKThis practical guide describes the stage by stage development of a new method for predicting the penetration rate (PR) and the advance rate (AR) for tunnel boring machines based on an expanded version of the Q-value, Qtbm.The book also looks at logging methods and tunnel support design.
Author: Gideon Smith
Publisher: Penguin Random House South Africa
Published: 2017-08-11
Total Pages: 1559
ISBN-13: 1775843688
DOWNLOAD EBOOKSouthern Africa is the natural home of the richest and most diverse succulent flora in the world. These plants come in all shapes and sizes, from trees such as the baobab at more than 20 m tall, to miniature soil huggers, just a few millimetres high, which mimic their pebble-desert surroundings. This user-friendly, richly illustrated field guide features more than 700 southern African succulents, focusing on the most interesting and commonly encountered species. An introduction to families and their key features will help readers identify the relevant plant group, while concise accounts describing the plants’ diagnostic features, along with distribution maps, will enable quick ID of species. More than just an ID guide for plant lovers, this book will inspire gardeners who are turning to indigenous, low-maintenance and waterwise plants for cultivation.