Botanical features of the Algerian Sahara

by William Austin Cannon

CONTENTS.

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Introduction		[1]
Geographical Characteristics of Algeria		[2]
Climate of Algeria		[6]
Some Characteristics of the Vegetation of theTell		[15]
The Forests of Algeria		[18]
The High Plateau		[20]
Boghari to Laghouat		[20]
Djelfa to Laghouat		[22]
Laghouat		[23]
	The Oasis of Laghouat	[24]
	The Plain	[25]
	The Dunes near Laghouat	[27]
	The Mountains about Laghouat	[28]
	Effects of Grazing on Vegetation near Laghouat	[29]
From Laghouat to Ghardaia		[31]
	Region of the Dayas	[31]
	Daya of Tilrempt	[32]
	The Chebka	[34]
Ghardaia		[36]
	The Oasis of Ghardaia	[38]
	The Plain (Hamada) of Ghardaia	[39]
	The Mountains about Ghardaia	[41]
	The Valley of the M’Zab	[41]
	Protected Areas near Ghardaia	[42]
	Root-Habits in the Ghardaia Region	[44]
	Leaf-Habits in the Ghardaia Region	[49]
	Growth and Flowering Habits in the Ghardaia Region	[49]
Ghardaia to Touggourt		[50]
Ghardaia to Ouargla—Vegetation		[53]
Ouargla to Touggourt—Vegetation		[56]
Touggourt to Biskra—Physical Features andVegetation		[58]
The Biskra Region		[59]
	Topography	[59]
	Plant Habitats of the Biskra Region	[60]
	Vegetation of the Biskra Region	[61]
General Summary and Conclusions		[66]
	The Environmental Conditions of Plants in Arid Regions	[66]
	Environmental Features of the Flora of Algeria	[69]
	Some Effects of Temperature and Rainfall in SouthernAlgeria	[71]
	The Soil Relation in Southern Algeria	[73]
	Root-Characters and Species Distribution in SouthernAlgeria	[76]
	The Biotic Factor	[77]
	Comparison of Some General Features of the Vegetation ofSouthern Algeria and of Southern Arizona	[79]

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