Fig. 27. LAMINAEIA LONGICRURIS. 
Colour. A beautiful pale- green olive ; the stem yellowish brown. 
Substance. Thin ; tender ; very delicate. 
Character of Frond. A flat, leafy expansion ; ribless ; growing from a stem. Stem, very 
long ; slender at each end ; swollen and hollow above the middle. Expansion, oval ; 
with a wavy curled margin, as if frilled. Root fibrous. 
Measurement. Stem, from 8 to 1 2 feet long. Expansion, from 6 to 8 feet long ; from 2 to 3 
feet wide. 
Fructification. Minute seeds {spores) imbedded here and there in the surface of the frond, 
thickening it, and forming cloudy patches. 
Habitat. Abundant on N. American shores from Greenland to Cape Cod. Occasionally drifted 
to the coasts of Scotland and Ireland by oceanic currents. 
But alas ! only the stems of this fine plant have ever reached us ; the delicate membranous 
leaf being always torn away in the voyage. Nevertheless, it is well to look out carefully, for a 
happy accident may bring us a complete frond some day. The stems are easily knovui from 
all others by their being hollow {tubular). 
Fig. 28. LAMINARIA SACCHARINA. 
Colour. When young, greenish olive ; brownish when old. 
Substance. When young, thin ; more or less delicate ; leathery when old. 
Character of Frond. A flat, leafy expansion; ribless; growing from a stem. Stem, always 
short in proportion to expansion. Expansion, ribbon-like, long, and narrow. Margins 
sometimes wavy and curled, sometimes smooth. Frond sometimes puckered down the 
sides. Root fibrous. 
Measurement. Stem, from a few inches to several feet long. Expansion, from 2 to 12 feet 
long ; from 4 to 16 inches wide. 
Fructification. Minute seeds {spores) imbedded here and there in the surface of the frond, 
thickening it, and forming cloudy patches. 
Habitat. Our coasts generally. On rocks at low- water mark, and in deep water ; common. 
There may be a danger of confounding this plant, when young, with L. Phyllytis. Never- 
theless, it is at all times thicker in substance, darker in colour, and more abrupt in growth at 
the base. Popularly called “ The Devil’s apron.” | 
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