JUNGERMAXXIACEAE. 



463 



1. Cololejeunea minutissima (Sm.) 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 snbrotiind, about lo" 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 Clififs. 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.) E%^ns. 

 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 !he 

 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. [Lejeunca 

 Jooriana Aust.] 



On trees, Taynter's Hill and Devonshire 

 Marsh. M. A. Hone. North Carolina to 

 Florida and Louisiana ; Bahamas ; Porto Rico. 



