PELTIGERA. 



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quiring a brown colour in herbarium. Apothecium suborbicular, 

 affixed to upper surface of extremities of elongated or produced 

 lobules of th alius, at first covered by a very thin thalline mem- 

 brane or veil, which soon dehisces. (Name from pelta, a target, 

 and gero, to carry.) 



1. Pelttgf/ra venosa {vena, a vein). Thallus erect, 

 small, simple, ovate, becoming sublobate or fan-shaped, dark 

 green above, — below white, variegated with brown, thick, 

 branching veins, which converge into a common pedicle; 

 apothecium reddish or blackish-brown, orbicular or trans- 

 versely oblong, with a thick margin. 



A very elegant, small, not very common subalpine spe- 

 cies, growing on the mud of walls, and on the earth in the 

 chinks of rocks frequently about waterfalls, in various parts 

 of the Highlands, as in the vicinity of Ben Lawers and 

 Blair Atholl; and also to a less extent in the Lowlands, as 

 in Dumfriesshire. The cells of the medullary tubes and of 

 the cortical layer have greatly thickened walls, and are 

 larger and coarser than in any other Feltigera we have ex- 

 amined. The spores (in a specimen from Reikie Linn, Den 

 of Airlie, Forfarshire) are elliptic-oblong, triseptate, much 

 broader, shorter, and more obtuse at the ends than those 

 of any other species of Peltigera ; they more resemble the 



