— 25 — 



projecting cell separated from the apical tooth by a single cell, sinus shallow 

 and only one or two cells long; cells of lobe averaginT; about I4m along the margin 

 and 24 X 22m in the middle and at the base, slightly convex, trigones small but 

 distinct, sometimes coalescent, triangular, with straight or rounded sides, inter- 

 mediate thickenings occasionally present, oval; stylus reduced to a hyaline 

 impilla: inflorescence autoicous: 9 inflorescence borne on a more or less abbrevi- 

 ated branch, innovating on one side, the innovation more or less elongated, 

 usually sterile but sometimes with a second 9 flower; bracts obliquely spreading, 

 complicate, vaguely crenulate along the keel but not winged, the lobe ovate to 

 obovate, 0.45-0.5 mm. long, 0.25-0.3 mm. wide, rounded to acute, margin as in 

 the leaves, lobule ovate, 0.2-0.3 rnr"- lo"g' 0.12-0.2 mm. wide, the broad apex 

 varying from acute to rounded, often shortly indented, margin irregularly crenu- 

 late; perianth obovoid, about 0.75 mm. long and 0.45 mm. wide, rounded to 

 truncate at the apex with a short but distinct beak, sharply five-keeled, the keels 

 extending below the middle, vaguely and irregularly cristate, the crests sometime 

 double, usually interrupted, rarely more than one cell wide, irregularly crenulate 

 or denticulate from projecting cells, surface of perianth otherwise smooth: S 

 inflorescence ("so far as knowm) terminal on a more or less elongated branch, 

 not proliferating; bracts in three to five pairs, imbricated, similar to the leaves 

 but with smaller lobes and larger lobules, apparently monandrous: capsule about 

 0.15 mm. in diameter: gemmae broadly orbicular, about 0.04x0.035 mm. com- 

 posed of sixteen cells, each apical quadrant cutting off two segments, margin 

 subentire, organs of attachment not present. [Figs. 5-14.] 



The genus Cololejeunea is now represented in Florida by six distinct species, 

 while the related genera Leptocolea and Aphanolejeiinea, are represented by one 

 species apiece. Since all three genera include species which are exceedingly 

 minute and inconspicuous, it would not be surprising if these numbers were 

 substantially increased in the future. In C. siibcristata the characteristic features 

 are the following: the ovate leaf-lobes, longer than broad, with the apex varying 

 from acute to rounded; the inflated lobules, with rudimentary proximal teeth; 

 the leaf-cells with distinct trigones but without surface-papillae of any sort; 

 and the five-keeled perianth with rudimentary crests on the keels. The crests 

 are very variable and sometimes scarcely distinguishable; when well developed 

 they are sometimes doubled and may show a width of two cells. This increased 

 width, however, is usually localized and may involve a single cell only, in which 

 case a larger tooth than the ordinary marginal crenulations is present. The 

 gemmae belong to the simplest type known in the genus and are comparable 

 with those found in C. myriocarpa (Nees & Mont.) Evans, C. tiiherculata Evans 

 and the various species of Aphanolejeunea} In their lack of marginal projections 

 and organs of attachment they come especially close to the gemmae of C. myrio- 

 carpa, where, however, the marginal crenulations are much more pronounced. 



Among the Florida species of Cololejeunea, C. subcristata is perhaps most 

 closely related to C. minutissima (Sm.) Schiffn, and C. setiloha Evans,^ but in 



iSee Evans. Bull. Torrey Club 38: 281. 1911; also Bryologist 18: 68. 1915- 

 ! Bryologist 16: 51. 1913. 



