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X.—The Arborescent Senecios of Kilimanjaro: A Study in Ecological Anatomy

Published online by Cambridge University Press:  06 July 2012

C. Leighton Hare
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Extract

The highly specialised features of the Compositæ leave little room for doubt that the family is an advanced one, and it is not without significance that the vast majority of its species should be herbaceous plants; shrubby species are infrequent, while trees are of the rarest occurrence. The markedly herbaceous habit is further emphasised if attention is confined to the large and widespread genus Senecio, comprising over 2000 species, for, although they include plants of very diverse habit, few attain to tree dimensions, or possess a well-developed, perennial, woody trunk. Herbs or shrubs account for 99 per cent, of the species, the former greatly predominating. The remainder comprises a small group of about 20 species, which have assumed the arborescent habit.

Type
Research Article
Information
Earth and Environmental Science Transactions of The Royal Society of Edinburgh , Volume 60 , Issue 2 , 1942 , pp. 355 - 371
Copyright
Copyright © Royal Society of Edinburgh 1942

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References

References to Literature

Brenchley, W. E., and Jackson, V. G., 1921. “Root Development in Barley and Wheat under different conditions of Growth,” Ann. Bot., vol. xxxv, p. 533.CrossRefGoogle Scholar
Burgeff, H., 1936. Samenkeimung der Orchideen, Jena, Gustav Fischer.Google Scholar
Cotton, A. D., 1930. “A Visit to Kilimanjaro,” Kew Bull., no. 3, p. 97.Google Scholar
Cotton, A. D., 1931. “The Arborescent Senecios of the Virunga Mountains,” Kew Bull., no. 6, p. 289.Google Scholar
Cotton, A. D., 1932. “The Arborescent Senecios of Mount Elgon,” Kew Bull., no. 10, p. 465.Google Scholar
Cotton, A. D., 1932. “The Tree Senecios of the African Mountains,” Proc. Linn. Soc., pt. 4, p. 110.Google Scholar
Eames, A. J., and MacDaniels, L. H., 1925. An Introduction to Plant Anatomy, New York.Google Scholar
Frost, F. H., 1930. “Specialization in Secondary Xylem of Dicotyledons. II. Evolution of End Wall of Vessel Segments,” Bot. Gaz., vol. xc, p. 198.CrossRefGoogle Scholar
Hauman, N., 1935. “Les Senecio arborescents du Congo,” Rev. Zool. Bot. Afric., vol. xxvii.Google Scholar
Jackson, V. G., 1922. “Anatomical Structure of the Roots of Barley,” Ann. Bot., vol. xxxvi, p. 21.Google Scholar
Maximov, N. A., 1929. The Plant in Relation to Water (English translation by Yapp, R. H.), London.Google Scholar
McDougal, W. B., 1921. “Thick-walled Root Hairs of Gleditschia and related Genera,” Amer. Journ. Bot., vol. viii, p. 171.Google Scholar
Salisbury, E. J., 1927. “On the Causes and Ecological Significance of Stomatal Frequency, with Special Reference to the Woodland Flora,” Phil. Trans. Roy. Soc. London, vol. ccxvi, B, pp. 1–65.Google Scholar
White, P. R., 1927. “Studies of the Physiological Anatomy of the Strawberry,” Journ. Agri. Res., vol. xxxv, p. 481.Google Scholar
Whittaker, E. S., 1923. “Root Hairs and Secondary Thickening in the Compositæ,” Bot. Gaz., vol. lxxvi, p. 30.CrossRefGoogle Scholar
Yapp, R. H., 1912. “Spiraea ulmaria and its Bearing on the Problem of Xeromorphy in Marsh Plants,” Ann. Bot., vol. xxvi, p. 815.Google Scholar