marked extension of its known range to the southward. The specimens bear 

 both gemmae and mature capsules and are in unusually good condition. Out- 

 side of North America Riccardia palmata is widely distributed in Europe and 

 northern Asia. 



4. Gololejeunea setiloba sp. nov. 



Collected at Sanford, Florida, by S. Rapp. The material consists of three 

 specimens, namely: No. 12, on trunk of myrtle near the base, January 28, 1906; 

 No. 27, on trunk of Ilex glabra, May 10, 1912; No. 59, May 16, 1912. No. 27 

 may be designated the type. The specimens are all preserved in the herbarium 

 of the writer at New Haven, Connecticut 



Yellowish or dark green, growing in depressed mats; stems about 0.05 mm. 

 in diameter, appressed to the substratum, at first simple, but afterwards becom- 

 ing irregularly and often copiously branched, the branches widely spreading, 

 rarely elongated and similar to the stem, usually very short and bearing sexual 

 organs; rhizoids mostly sparingly produced; leaves distant to subimbricated, 

 the lobe obliquely to widely spreading, plane or slightly convex, ovate from a 

 narrow base, gradually narrowed toward the obtuse or rounded apex, maximum 

 size about 0.4 X 0.3 mm., but often considerably smaller, margin crenulate 

 from projecting cells; lobule in the form of a narrow basal fold with a straight 

 or slightly arched keel, the free margin bearing a single tooth usually consisting 

 of from two to four cells in a row, occasionally two cells wide at the base, hyaline 

 papilla at the tip of the tooth; stylus reduced to a hyaline papilla at the 

 base of the lobule; leaf cells averaging about 15^ along the margin and i8/x in 

 the median and basal portions of the lobe, convex, thin-walled throughout: 

 inflorescence autoicous: 9 inflorescence sometimes borne on an elongated 

 branch, sometimes on a more or less abbreviated branch, innovating on one 

 side, the innovation usually short and sterile, but sometimes floriferous; bracts 

 obliquely spreading, distinctly complicate but not winged along the keel, the 

 lobe much as in the leaves but usually smaller than the lobes on robust primary 

 shoots, averaging about 0.35 X 0.15 mm., margin crenulate, lobule oblong or 

 obovate, the free portion variable in extent, rounded to subacute, averaging 

 about 0.2 X 0.09 mm.; perianth obovoid, about 0.45 mm. long and 0.35 mm. 

 in diameter, sharply five-keeled to about the middle, the keels roughened from 

 projecting cells, rarely narrowly winged, apex rounded to truncate with a short 

 beak, basal stipe (formed after fertilization) usually short: <? inflorescence 

 sometimes terminal on a leading branch, sometimes on a very short branch, 

 the bracts mostly in from one to six pairs, complicate-bilobed with subequal 

 lobes or with the dorsal lobe slightly larger than the ventral, both lobes rounded 

 to subacute at. the apex; antheridia mostly in pairs: gemmae without organs of 

 attachment, broadly orbicular, averaging about 0.075 X 0.09 mm., margin 

 crenulate from projecting cells: capsule about 0.15 mm. in diameter; spores 

 greenish, minutely verruculose, about 15^ in short diameter; elaters about 5m 

 wide. (Figures 1-7.) 



