File:The natural history of plants, their forms, growth, reproduction, and distribution; (1902) (14781136004).jpg

Identifier: naturalhistoryof01kern (find matches)
Title: The natural history of plants, their forms, growth, reproduction, and distribution;
Year: 1902 (1900s)
Authors: Kerner von Marilaun, Anton, 1831-1898 Oliver, Francis Wall, 1864- Macdonald, Mary Frances Ewart Busk, Marian Balfour, Lady
Subjects: Botany
Publisher: London, Blackie
Contributing Library: NCSU Libraries
Digitizing Sponsor: NCSU Libraries

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The following equipment appears particularly often in severalpines, many grasses, sedges, and rushes, in species of the genus Yucca, in severalcaryophyllaceous plants (Drypis and Acanthophyllum), in Acantholimon,belonging to the order PlumbaginesB, and in some saltworts and succulent plants(Umbilicus spinosus, Sempervivum acuminatum). The green leaves arenumerous, usually crowded thickly together to form a tuft, and project fromthe axis in all the directions of the compass; they are rigid, undivided, linear,round or triangular in cross section, and terminate in a sharp, strong, piercing spine.This form of leaf may be termed acicular (or needle-shaped). In many cases, at allevents, such leaves have exactly the form of needles, and in regions where theunaltered products of nature are still preferably used as tools and utensils, theyactually serve as needles. That plants possessing leaves with these needle-like PROTECTION OF GREEN LEAVES AGAINST ATTACKS OF ANIMALS. 435 % ^. f if (I W If
Text Appearing After Image:
\^\V \\\ VI W\\\^ ;; 436 PROTECTION OF GREEN LEAVES AGAINST ATTACKS OF ANIMALS. points are excellently protected against the attacks of animals, scarcely requires tobe proved more in detail; however, it might be indicated by special mention of twointeresting examples. In the Southern Alps, in the neighbourhood of Monte Baldo„and on the opposite mountains behind Vallarsa, a species of grass (Feduca alpestris^see fig. 8G ^), is found here and there, whose rigid leaves, projecting in all directions,.

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