Vol. VI, No. 3.] Buttetin or THE TorREY Boranicat Cuus. [New York, Mch., 1875. 
§ 15.—NEW HEPATICA, by C. F. Austin. 
1. Riccia Frostii, ». sp. Fronde parva orbiculari solidiuscula 
(subcavernosa ?) tenui plana cineraceo-viridi subpalmatim radia- 
timve divisa fibroso-reticulata minuteque foveolata subtus esqua- 
mosa haud carinata radiculis intus fere tota levibus instructa, mar- 
gine nuda angustissime membranacea nonnumquam obsolete pur- 
purea, laciniis subsphathulato linearibus subdichotomis, lobis apice 
leniter dilatatis subtruncatis indistincte emarginatis, sporangiis per- 
multisin medio frondis dispersis subtus valde prominentibus, sporis 
parvis (vix 1-500 unc. metientibus) fuscis obscure angularibus 
biconvexis in circuitu subrotundis minute granuloso-papillosis ob- 
scure minute reticulatis opacis subnigro-marginatis in statu siccato 
lateribus undique valde depresso-concavis. 
Nevada, S. Watson ; communicated by C. C. Frost, Esq. 
Colorado, Wolf and Rothrock ; communicated by Dr. James. (As- 
sociated with W. crystallina.) 
Fronds, 5—7 lines, and lobes $—% of a line broad. Resembles 
R. crystallina in some respects; but that has the larger, thicker, and 
vesiculose frond much more coarsely pitted in the upper surface, 
with the divisions much broader, rootlets strongly papillose within, 
spores twice the diameter, coarsely tuberculated, the sides not con- 
cave when dry, &c. 
R. glauca has a larger frond of a different texture above, and more 
broadly membranaceous on the margin; spores x, of an inch in 
diameter, coarsely réticulated, the sides not depressed when dry ; 
rootlets as in Z?. erystallina, &c. 
I have recently received a single specimen of this species from 
Dr. H. C. Beardslee, collected on alluvial soil near Painesville, 
Ohio, which differs from the Rocky Mountain specimens above de- 
scribed as follows: 
Frond solid, orbicular, its divisions somewhat papulose-squamulose 
and frequently slightly tinged with purple along the margins, about 
an inch in diameter, divided to the centre into numerous narrow 
lacinie which are concave-canaliculate above (both in the dry and 
in the moist state), lobes almost linear, sporangia much less 
numerous, 
2. Riccia Watsoni, ». sp.—Fronde parva fusco-purpurea orbicu- 
lari profunde pluries divisa crassiuscula solidiuscula superne late 
foveolata papuloso-et fibroso-reticulata glandis magnis subclavatis 
obsita, laciniis angusiis dichotomis supra planis (vel in siccis late 
canaliculatis) subtus carinato-incrassatis concoloribus esquamosis 
valde radiculosis radiculis intus levibus, lobis sublinearibus apice 
valde obtusis anguste emarginatis subincrassatis intus tuberis 
magnis farctis (ut fronde valde vesciculosa videatur): fructu ignoto. 
It is barely possible that this may prove to be the male plant of 
R. Frostii, It is distinguished by the purplish color of the very 
small frond, with large gland-like bodies on its surface, and large 
tuber-like bodies situated in its substance; also by the rootlets be- 
ing entirely smooth within. There are no cavities in the frond ex- 
cepting those containing the tuber-like bodies (or which have con- 
tained them at some former time). These bodies are solid and 
