186 Evans: Hepaticae from Florida 



irregularly braoched, the branches obhquely to widely spreading, 

 not microphyllous but usually with somewhat smaller leaves than 

 the stem ; rhizoids numerous, springing from the underleaves : 

 leaves contiguous to loosely imbricated, the lobe widely spread- 

 ing, ovate, 0.7 mm. long, 0.5 mm. wide, attached by a long and 

 almost longitudinal Une of insertion, antical margin straight or 

 slightly curved near base, then more strongly curved to apex, 

 postical margin less strongly curved, apex mostly broad and 

 rounded, very rarely obtusely pointed^ margin subentire or 

 slightly and irregularly crenulate from projecting cells ; lobule 

 often obsolete, when well-developed inflated, triangular-ovoid, 

 0.12 mm. long, 0.09 mm. w^ide, keel sHghtly arched, roughened 

 from projecting cells, free margin involute to apex, then passing 

 by a long and shallow sinus to end of keel, apex tipped with a 

 single, very blunt cell bearing a hyaline papilla at its proximal 

 base ; cells of lobe plane or somewhat convex, averaging 20 // at 

 the margin and 33 x 25 /i in the middle and at the base, thin- 

 walled throughout or with very minute trigones : underleaves dis- 

 tant, plane, orbicular, 0.2 mm. long, somewhat narrowed toward 

 the base, bifid about one third with broad, triangular, rounded or ob- 

 tuse lobes and a narrow sinus ; margin very slightly crenulate from 

 projecting cells ; radicelliferous region bounded on each side by a 

 large cell, sometimes developing a rudimentary disc : inflorescence 

 autoicous : Q inflorescence borne on a leading branch or on a 

 short branch, innovating on one side, the Innovation sterile or 

 again floriferous ; bracts obliquely spreading, slightly complicate, 

 the lobe oblong to ovate, 0.8 mm. long, 0.35 mm, wade, rounded 

 to subacute at the apex, margin as in the leaves, lobule narrowly 

 oblong, 0.25 mm. long, 0.04 mm. wide, scarcely projecting beyond 

 end of keel, blunt, entire ; bracteole slightly connate on both sides 

 with bracts, ovate to obovate, 0.45 mm. long, 0.35 mm. wide, 

 bifid about one tenth with broad, rounded or obtuse divisions and 

 an obtuse sinus, margin as In the leaves ; perianth slightly or not 

 at all exserted beyond the bracts, obovoid, 0.7 mm. long, 0.4 mm. 

 in diameter, narrowed toward the base, broad at the apex and 

 with a distinct ciliolate beak, terete below, sharply five-keeled in 

 upper third, the keels crenulate from projecting cells and extend- 

 ing upward as short rounded processes, surface otherwise smooth 

 or nearly so : J^ inflorescence occupying a short branch ; bracts 

 in two to ten pairs, imbricated and strongly inflated, 0.17 mm. 

 long, o. I mm. wide, shortly bifid with obtuse divisions, the lobule 

 slightly smaller than the lobe ; antheridia solitary or in pairs ; 

 bracteoles at base of spike only, rotund and shortly' bifid : mature 

 sporophyte not seen. (Plate 5, figures 15-21.) 



In hammocks near the homestead trail, between Cutler and 



