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César Augusto Bianco:

Growth forms, taxonomy, distribution, and uses of the Adesmia species (Leguminosae) in Central Argentina

2002. 157 pages, 120 figures, 5 tables, 14x23cm, 240 g
Language: English

(Dissertationes Botanicae, Band 356)

ISBN 978-3-443-64268-6, paperback, price: 40.00 €

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Keywords

botanyAdesmiaLeguminosaeArgentina

Contents

Synopsis top ↑

This investigation focused on the study of the growth forms, taxonomy, distribution, and uses of the Adesmia species (Leguminosae), which are found in central Argentina (southern part of the province of Córdoba and provinces of San Luis and La Pampa).

In the work area, 17 taxa were analysed. Fifteen are included in the subgenus Adesmia in six series: Bicolores (A. bicolor (Poir.) DC., A. incana Vogel var. incana, A. incana var. grisea ((Hook. f.) Burkart); Hispidulae (A. filipes A. Gray, A. leptobotrys Burkart); Lihuelenses (A. lihuelensis Burkart); Macrostachyae (A. macrostachya Benth.); Muricatae (A. cordobensis Burkart, A. grandiflora Hook. et Arn., A. muricata (Jaq.) DC. var. muricata, A. muricata var. dentata (Lag) Benth., A. muricata var. gillesii (Hook. el Arn.) Burkart, A. retrofracta Hook. et Arn.); and Comechingonae (A. comechingona C. A. Bianco & Weberling); and the remaining taxa are included in the subgenus Acanthadesmia, in three series Microphyllae (A. trijuga Gill. ex Hook. et Arn.); Guttuliferae (A. guttulifera Sandwith); and Candidae (A. patagonica Speg.).

In the annual species, the branching system is determined by the behaviour of the cotyledonary buds and the main axis. In the perennial species, on the other hand, this system varies according to the habitat. On the plains, herbaceous forms with very long paracladia and diplobotryums with more than 20 flowers were observed. In environments with soils of scarce coverage and annual rainfall below 200 mm, ligneous shrubs with systems of highly specialised macroblasts and brachyblasts, branches transformed into thorns, and three-flowered racemes were found.

A description of the species and its iconography, maps of distribution, and observations on the habitat as well as the phenology are presented.

Resumen top ↑

Esta investigacion comprendió el estudio de las formas de crecimiento, taxo— nomia, distribucion y usos de las especies de Adesmia (Leguminosae) que crecen en el centro de la Argentina (Sur de la provincia de Cordoba, provincia de San Luis y provincia de La Pampa).

En el área de trabajo se analizaron l7 taxones, de los cuales 15 se ubican en el subgenero Adesmia en seis series: Bicolores (A. bicolor (Poir.) DC., A. incana Vogel var. incana, A. incana var. grisea ((Hook. f.) Burkart); Hispidulae (A. filipes A. Gray, A. leptobotrys Burkart); Lihuelenses (A. lihuelensis Burkart); Macrostachyae (A. macrostachya Benth.); Muricatae (A. cordobensis Burkart, A. grandiflora Hook. et Arn., A. muricata (Jaq.) DC. var. muricata, A. muricata var. dentata (Lag) Benth., A. muricata var. gillesii (Hook. el Arn.) Burkart, A. retrofracta Hook. et Arn.); y Comechingonae (A. comechingona C. A. Bianco & Weberling); y las restantes en el subgénero Acanthadesmia, en tres series Microphyllae (A. trijuga Gill. ex Hook. et Arn.); Guttuliferae (A. guttulifera Sandwith); y Candidae (A. patagonica Speg.).

En las especies anuales el sistema de ramificación esta determinado por el comportamiento de las yemas cotiledonares y el eje principal. En las especies perennes varia en función de hábitat, encontrándose en la láanuras desde formas herbáceas con paracladios muy largos y dibotrios con mas de 20 flores, hasta arbustos leñosos con sistemas de macroblastos y braquiblastos muy especializados, ramas transformadas en espinas y racimos de tres flores en ambientes con suelos de escasa cobertura y precipitaciones menores a los 200 mm anuales.

Contents top ↑

1 Introduction 1
1.2 General Objective 6

1.3 Specific Objectives 6

2 Growth forms 7
2.1. Historical evolution of the term 7

2.1 Different schools and their concepts 9
2.2 Growth forms in Leguminosae 12

3 Characterisation of the area of study 13
4 Materials and methods 37
5 Results 39
6 Description of the species 45

Adesmia muricata var. muricata 45
var. gilliesii 50
var. dentata 50
Adesmia leptohotlys 52
Adesmia filipes 57
Adesmia ret) of racta 61
Adesmia bicolor 67
Adesmia incana var. incana 73
var. grisea 77
Adesmia macrostachya 78
Adesmia cordobensis 83

Adesmia comechingona 89
Adesmia lihuelensis 96
Adesmia grandiflora 101
Adesmia trijuga 105
Adesmia guttulifera 114
Adesmia patagonica 117
7 Comparative analysis of growth forms the studied Adesmia species 120
8 Discussion 130
9. Conclusions 136
10 Abstract 138
11 Resumen 139
12 Bibliography 140
13 Index ob botanical and common names l53
14. Acknowledgements 157