15 
the lower margin ; when detached from the stem both its margins 
are frequently slightly ascending, giving it a subconcayve appear- 
ance. There are frequently 1-2 or 3 caude-like teeth, chiefly to- 
wards the base, on the upper margin. There are usually 3 caud@ 
on each side of the amphigastria towards the base. 
Probably closely related to I. Niesiana, Lindbg., Synop. Hepat., 
P. 271; but that does not appear to be sufficiently described, and it 
el ae = have the lower lobe of the leaf oblong, and the amphigas- 
ria obtuse. 
10, Madotheca Sullivantii, Aust—Caule plerumque simpliciter pin- 
hato siccando apice valde decurvo, foliis madefactis erectioribus, 
margine ventrali stricta multumque involutiori, cellulis majoribus 
punctato-stelliformibus, perianthio ventre late carinato, carina bi- 
angulata, ete., facile ab J. involuta, Hampe, distinguendua.— Aust. 
Hep. Bor. Amer. Exsic. ined., No. 94. 
_ Hab. In the Atleghany Mountains, W. S. Sullivant (1845). 
About the size and with much the general appearance of large 
forms of Radula pallens.—Readily recognized by the very straight 
and strongly involute ventral margin of the leaf, ete. 
_Il, Lejennia Sullivantie, Aust.—L. caule stricto appresso parce di- 
viso vel subsimplice ; foliis subimbricatis oblique obovato-rotundis 
erecto-patentibus margine subrepandis, areolis parviusculis sub- 
obscuris versus marginem sensim decrescentibus, lobulo subeucul- 
to unidentato ; amphigastriis caule duplo vel triplo latioribus 
ovato-orbiculatis sinu angusto bifidis, laciniis semiovatis acutius- 
culis : sterilis—Hepat. Bor. Amer. Exsic. ined. No. 96.—L. serpylli- 
Solia, var., Sulliv. Muse. Alleghan. No. 273. 
Hab. On the bark of trees and on the ground!. in the Southern 
States, Sullivant, (1845); Louisiana, Prof. A. Featherman (1870). 
: About the size of L. serpyllifolia, or a little larger.—Readily dis- _ 
tinguished byits straightish subsimple stems, and by the subopaque 
TO ary cellules, which sensibly diminish towards the margin of 
e leaf. : 
22. Frullania Wrightii, Aust.—F. dioica, di(-tri)-gyna ; caule brevi 
Prostrato subfasciculatim tel vage ramoso ; foliis imbricatis subro- 
tundis obliquis valde convexis oblique decurvis siccatis subconyo- 
lutis apice et margine inferiore subinflexis basi insequaliter cordatis 
margine integerrimis, areolis parvis haud convexis basilaribus parce 
majoribus marginalibus subquadratis ; auriculis mediocribus cucul- 
lato-galeatis rotundis subovatisve basilaribus et apicalibus explana- 
fis cauli subcontiguis vel subdistantibus, lobulo dentiformi interjecto 
Parvo plerumque lineari-lanceolato ; amphigastriis late obovatis ad 
4 emarginato-bidentatis margine repando-dentatis caule sesqui vel => 
duplo latioribus ; ramulo fructifero perbrevi subclavato vel adspec- _ 
tu fere capituliforme arcte foliato; foliis seph open valde — 
Tibus basi sensim angustata sessilibus uno alterove cum amphigas- 
trio coalitis, lobulo dorsali oblongo integerrimo vel subrepando 
_ 8pice cucullato-inflexo, ventrali dimidio breviore ovato-lanceolato 
Spe subfalcato acuto planiusculo vel subcanaliculato margine me- 
* 
