JUNGERMANNIACEAE. 



463 



1. Cololejeunea minutissima (Sin.) Schiffn. 

 MINUTE COLOLEJEUNEA. (Fig. 510.) Plants 

 yellowish green, varying to dark green, loosely 

 tufted or scattered. Leaves distant to subim- 

 bricated, the dorsal lobe spreading, convex, 

 ovate to subrotund, about T V' long, crenu- 

 late, rounded to very obtuse at the apex ; lobule 

 almost as long as the lobe, inflated, with two 

 teeth in the apical region when well developed 

 but often rudimentary; leaf -cells thin-walled 

 throughout; inflorescence autoecious; perianth 

 obovoid, sharply 5-keeled in upper part, trun- 

 cate or rounded at the apex with a short beak. 

 [Jungermannia minutissima Sm.] 



On trees, Devonshire Marsh, Walsingham 

 Caves, and Abbot's Cliffs. Western and southern 

 Europe ; South Carolina to Florida and Texas. 



9. LEPTOCOLEA [Spruce] Evans. 



Distinguished primarily from Cololejeunea 

 by its strongly flattened perianth with sharp 

 lateral keels. Dorsal lobe of the leaves usually 

 rounded at apex; leaf-cells more variable than in Cololejeunea, sometimes with 

 thickened walls and distinct trigones, sometimes differentiated as ocelli or as 

 empty and hyaline cells. In other respects agreeing with Cololejeunea. [Greek, 

 slender sheath.] About 30 species, mostly tropical. Type species: L. micran- 

 droecia (Spruce) Evans. 



1. Leptocolea Jooriana (Aust.) Evans. 

 JOOR'S LEPTOCOLEA. (Fig. 511.) Yellowish 

 green or whitish, loosely tufted or scattered. 

 Leaves imbricated, the dorsal lobe widely 

 spreading, plane, ovate, about \" long, 

 gradually narrowed to the apex, usually bear- 

 ing from one to ten hyaline cells with free 

 extremities; lobule about half as long as the 

 lobe, with two teeth in the apical region; 

 leaf-cells with slightly thickened walls and 

 indistinct trigones; inflorescence paroecious 

 or synoecious; perianth ovate to obovate in 

 outline, truncate to very slightly retuse at 

 the apex with a very short beak. [Lejeunea 

 Jooriana Aust.] 



On trees, Paynter's Hill and Devonshire 

 Marsh, M. A. Howe. North Carolina to 

 Florida and Louisiana ; Bahamas ; Porto Rico. 



