The Ferns of the English Lake Country With a List of Varieties
The Ferns of the English Lake Country With a List of Varieties
W J William James Linton
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The distinguishing characteristics, however, of L. Dilatata in the group of Crested Shield Ferns, of which it forms a very large proportion, are its lance-shaped dark- 56 FERNS OF THE LAKE COUNTRY centred scales and its gland-fringed indusia. The fol- lowing description applies to the more usual or typical form of dilatata. Fronds ovate, lance-shaped in general outline, on a stipes of moderate length much thickened at the base and densely clothed with entire lance-shaped pointed scales very dar...k brown in their centres but nearly transparent at their margins ; bipinnate, with elongate- triangular, or tapering, pinnae, placed nearly opposite, and more or less obliquely, from the larger develop- ment of the lower side. Pinnae pinnate, pinnules near their base often so deeply divided as to be again almost pinnate, the rest pinnatifid or in the upper parts merely deeply serrated, but the margins, whether deeply or shallowly lobed, set with teeth ending in short spinous points. Venation similar to the more compound parts of the allied species.
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