384 Evans: New West Indian Lejeuneae 



wardly curved to the rounded or obtuse apex, postical margin 

 slightly curved, margin everywhere entire ; lobule ovate-triangular 

 in outline, 0.5 mm. long, 0.25 mm. wide, the inflated portion 

 forming a conical water-sac extending along the keel and about 

 half as long as the lobe, keel straight or slightly arched, distinctly 

 indented in outer part and usually forming a continuous line with 

 postical margin of lobe, free margin rounded or subcordate at 

 base, appressed to lobe for about two thirds its length and then 

 passing by a straight or very shallow sinus into the postical mar- 

 gin of lobe, appressed portion usually with five or six teeth, the 

 innermost rounded, the others (including the outermost or apical) 

 mostly three or four cells long and one or two cells wide at base, 

 often curved toward the surface of lobe, hyaline papilla at proxi- 

 mal base of outermost tooth, slightly displaced from the margin 

 but sometimes borne on the antical surface of a marginal cell ; 

 cells of lobe plane or a little convex, averaging 13/* at the margin, 

 25 x 1 8 fi in the middle and 30 x 23 /; at the base, trigones dis- 

 tinct, triangular but usually with one concave and two convex 

 sides, intermediate thickenings infrequent, oval : underleaves 

 loosely imbricated, plane, broadly orbicular, 0.35 mm. long, 0.4 

 mm. wide, rounded to minutely auriculate at the base, rounded to 

 truncate at the apex, margin entire : inflorescence autoicous : V 

 inflorescence usually borne on a more or less elongated branch,^ 

 more rarely on a very short branch, innovating on both sides, 

 rarely on but one, the innovations widely spreading, sterile or soon 

 again floriferous ; bracts obliquely spreading, sharply complicate 

 with a narrow and entire wing along keel, lobe broadly ovate, 0. 

 mm. long, 0.5 mm. wide, obtusely pointed, irregularly sinuate, 

 lobule oblong, 0.4 mm. long, o. 1 2 mm. wide, adnate for most 

 its length, apex obtuse, acute, or apiculate ; bracteole free or near y 

 so, oval or oblong, 0.7 mm. long, 0.4 mm. wide, rounded to trun- 

 cate at the apex ; perianth about halfexserted, ovoid, 0.9 mm. long, 

 0.5 mm. wide, cuneate toward base, rounded to truncate at apex 

 with a short beak, scarcely compressed, ten-keeled (four antica , 

 four postical, and two lateral), the keels rounded, extending to t e 

 middle or below: <? inflorescence usually on a leading b [ an ^/ 

 terminal or becoming intercalary by proliferation ; bracts im fl- 

 oated, mostly in from three to ten pairs, diandrous, similar to 

 leaves but with more obliquely spreading, shorter lobesan d re ^ 

 tively broader and more inflated lobules, the free margins ot « 

 latter being more irregularly toothed, keel strongly arched ; b ra ^ 

 teoles imbricated, similar to the underleaves : capsule 0.4 mttt ' 

 diameter ; spores minutely verruculose, about 40 /* in diame 



(Plate 28, figures 1-14.) 



