How to know grasses by the leaves.

  • McAlpine, Archibald N., 1855-1924.
Date:
[1890?]
Catalogue details

Licence: Public Domain Mark

Credit: How to know grasses by the leaves. Source: Wellcome Collection.

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    Group XII. Ribless-bladed Grasses Median Lines. with Soft or Succulent Beaded Meadow never Hairy—Poa. Thick-bladed Poas.~SY\,t sheaths Grasses, edges 1 1 j ,, — with rounded blades parallel-edged and round-pointed : hard rather than succulent. Sheath Ligule Nodes Growth Figures Poa Poa Poa pratensis, L. (Smooth-stalked meadow grass.) I Elliptical in section | Vpy short and thick !!!| Light coloured i Creeping underground... i 1. Rounded apex of blade.! 2. Rounded base of blade! and parallel edges. ! 3. Theshort ligulespread' out (magnified). I 4. Transverse section of I the relatively thick I blade (magnified). ‘ After Lund. I 5. Portion of blade as it' appears by trans- 1 mitter! light (mag- nified). 1' Poa compressa, L. (Flat-stemmed meadow grass.) Flatter. Longer and thin. Dark coloured. Before flowering the shoots bend down, run along the ground, and strike root. nmntnna, Htids. {See Group VIII.) occurs here.— Blade bnstle-like, or concave; succulent. The absence of a keel on the blade distinguishes this from all other Poas. alpina, Z.—Blade flat, almost succulent ; base of tuft almost bulbous. See Group III.
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