Botanical featur
Botanical features of the Algerian Sahara
作者：Cannon, William Austin, 1870-1958
体例：题 章数：87
字数：231,141 来源：Project Gutenberg
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cache/epub/70581/pg70581.txt（Project Gutenberg）
章节目录
共 87 题- Illustration: Fig. 1. View of the Oasis of Laghouat
- Geographical Characteristics of Algeria 2
- Climate of Algeria 6
- Some Characteristics of the Vegetation of the Tell 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 and Vegetation 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 Southern Algeria 71
- The Soil Relation in Southern Algeria 73
- Root-Characters and Species Distribution in Southern Algeria 76
- The Biotic Factor 77
- 5. Shoot-habit of _Zollikoferia spinosa_. Laghouat.
- 23. Leaves of _Capparis spinosa_ from Ghardaia.
- 25. Shoot-habit of _Salvia ægyptica_. Ghardaia.
- 30. Leaf-habit of _Henophyton deserti_. Ghardaia.
- 54. Looking toward the Ouargla plain (reg).
- 55. Shallow well about 25 km. north of Ouargla.
- 69. Habitat of _Phelyæa violacea_ shown in figure 70.
- BOTANICAL FEATURES OF THE ALGERIAN SAHARA.
- TABLE 1.—_Seasonal distribution of rain._
- TABLE 2.—_Rainfall at Ouargla, in millimeters._
- TABLE 3.—_Seasonal distribution, in percentages, of rain._
- TABLE 4.—_Mean relative humidity, in percentages._
- TABLE 9.—_Absolute daily range in temperature._
- TABLE 10.—_Average maximum temperatures._
- TABLE 11.—_Sums of the daily maximum temperatures._
- THE OASIS OF LAGHOUAT.
- THE PLAIN.
- THE DUNES NEAR LAGHOUAT.
- THE MOUNTAINS ABOUT LAGHOUAT.
- EFFECTS OF GRAZING ON VEGETATION NEAR LAGHOUAT.
- REGION OF THE DAYAS.
- DAYA OF TILREMPT.
- THE CHEBKA.
- THE OASIS OF GHARDAIA.
- THE PLAIN (HAMADA) OF GHARDAIA.
- THE MOUNTAINS ABOUT GHARDAIA.
- THE VALLEY OF THE M’ZAB.
- PROTECTED AREAS NEAR GHARDAIA.
- ROOT-HABITS IN THE GHARDAIA REGION.
- LEAF-HABITS IN THE GHARDAIA REGION.
- GROWTH AND FLOWERING HABITS IN THE GHARDAIA REGION.
- GHARDAIA TO OUARGLA—VEGETATION.
- TOPOGRAPHY.[29]
- PLANT HABITATS OF THE BISKRA REGION.
- VEGETATION OF THE BISKRA REGION.
- THE ENVIRONMENTAL CONDITIONS OF PLANTS IN ARID REGIONS.
- ENVIRONMENTAL FEATURES OF THE FLORA OF ALGERIA.
- SOME EFFECTS OF TEMPERATURE AND RAINFALL IN SOUTHERN ALGERIA.
- THE SOIL RELATION IN SOUTHERN ALGERIA.
- ROOT-CHARACTERS AND SPECIES DISTRIBUTION IN SOUTHERN ALGERIA.
- THE BIOTIC FACTOR.
- Illustration: Fig. 23. Leaves of Capparis spinosa, from Ghardaia.]
- Illustration: Fig. 30. Leaf-habit of Henophyton deserti. Ghardaia.]
- Illustration: Fig. 55. Shallow well about 25km. north of Ouargla.]
- FOOTNOTES: