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Yale University Herbarium

YU.180183

67. Riccia tumida, Ldg. — Fronds minute, crowded, thick and fleshy, oblong-pyriform, obtuse, remarkably narrowed at the base, margins tumid, covered with purple scales, and fringed with a double row of lanceolate cilia; capsules immersed, spores small, papillose.

From *R. ciliata* this is distinguished at once by the form of frond, purple scales, and double row of cilia.

In *R. ciliata* the segments are regularly furcate, more densely ciliated, linear-cuneiform, texture thinner, and both surfaces pale dirty green; whilst *R. glaucescens* may be known by the larger size, acute edges of the fronds, and less crowded ramification.

According to Lindberg, this is the *Riccia minima*
*glauca*, *segmentis augustioribus*, *ad margines pilosis-*
*simis*, *Nov. Gen. Pl.*, p. 107, n. 3, t. 57, f. 6.

First collected in Britain by Wm. Joshua, Esq., near Monmouth, May, 1877.—B.C.