69S HEPATICiE. (LIVERWORTS.) 



on the back, the keels crested. (F. dilatata, Muse. Alleghan. No. 267, partly.) — 

 Rocks and trees ; common. 



7. F. EaoracensiS, Lchm. Stems creeping, fasciculately branched; 

 stem-leaves loosely disposed (the rameal imbricated), round-ovate; amphigastria 

 ovate, a little wider than the stem ; perianth smooth, pear-shaped, slightly com- 

 pressed and rcpand, beneath obtusely keeled and gibbous near the apex. (F. 

 microscypha, Iceviseypha, & nana, Taylor. ) — - Bark of trees; common. 



8. F. saxatilis, Lindenberg. Near the last, but separated by its pinnate- 

 ly branched and more rigid stems, more crowded leaves, much larger amphigas- 

 tria, and shorter perianth. — Trees, Massachusetts. 



9. F. plana, Sulliv. (in Mem. Amer. Acad. 1. c.) Resembles No. 

 7, but is a somewhat larger species ; the auricle very small, close to the stem, 

 and covered by the plane rotund acutely bifid amphigastria, which are thrice 

 the width of the stem ; perianth oblong-oval, or nearly obovatc, plane above, 

 carinato beneath. — Rocks; East Tennessee. 



10. F. rcolotiS, Necs. Not unlike No. 8; leaves semi-vertical, subsquar- 

 rose, obliquely cordate, the auricle usually expanded into a lanceolate lamina ; 

 perianth unknown. — Grows in spongy masses on decayed logs, stumps, &c. ; 

 common. 



30. LEJEtRlIA, Libert. (Tab. 22.) 



Fructification lateral or terminal, on proper branches. Involucral leaves 2, 

 deeply 2-lobed. Perianth oval or obovate, terete or angular, winged or ciliate- 

 crestcd on the angles, the mouth 3 - 4-lobed ; pistillidium single. Calyptra obo- 

 vate, persistent, rupturing below the apex. Capsule, globose, membranaceous, 

 pate, 4-cleft to the. middle, Elaters persistent, adherent to the tips of the valves, 

 erect, the upper end truncate-dilated, with a single spiral fibre. Spores large, 

 irregular. Inflorescence dioecious. Antheridia on proper branches, lodged in 

 the ventrieose base of imbricated 2-lobed perigonial leaves. Amphigastria present. 

 (Named for Lejeune, a French botanist.) 



* Amphigastria entire. 



1. E. Clypeata, Schweinitz. Stems (7"- 10" long) procumbent, some- 

 what pinnately branched; leaves (whitish-green, of a firm texture) with the 

 upper lobe round-obovatc and detlexed, the lower oblong, quadrate; amphi- 

 gastria orbicular, approximate ; perianth lateral, sessile, obovatc, obtusely 

 keeled on the back, 2-keeled beneath, the margin subcompressed. —Alleghany 

 Mountains. (Tab. 22.) 



2. E. longiflora, Tayl.! Closely resembles the last species, but has 

 leaves of a more membranaceous texture, and a 5-winged perianth.— On trees, 

 Southern Ohio to Florida. 



3. E. calycillata, Tayl. Stems entangled, branched ; leaves patent- 

 recurved, oblong, obtuse, subdeflexed ; the lower lobe involute, lanceolate ; 

 amphigastria rotund ; perianth axillary, rather esserted, obcordate, 4-winged, 

 the wings entire ; involucral leaves narrow, acute. - On iiehens ; Alleghany 

 Mountains. 



