4 ERYTHEA. 
The first three, Lichen petreus latifolius sive Hepatica fon- 
tana, Lichen petreus stellatus, and Lichen petreus wmbel- 
latus, all belong to Marchantia polymorpha. The others 
are the Preissia first described in the Prodromus and the 
three of Columna—Conocephalus, Pellia, and Targionia. 
C. Bauhin’s list of five species is the most complete that we 
have met with up to this point. 
John Parkinson in his “Theatrum Botanicum”™ gives 
nearly two large quarto pages to descriptions and figures of 
“ Liverwort.” He recognized seven species, but, as the first 
two may be reduced to M. polymorpha and as the seventh is 
a lichen used for making purple dye, we have left but the 
five of C. Bauhin. Parkinson repeats Gerard’s error of 
accompanying his first description of Marchantia with the 
figure of a Sticta. In his description of the smaller form of 
Marchantia—Hepatica minor stellaris-—he says that “ there 
is also another sort that beareth not divided leaves and the 
small stalks have round heads, not differing in any other 
thing from the last,’ which recalls Johnson’s treatment of 
the male and female forms in the revision of Gerard’s 
Herball. But, on figuring these forms, Parkinson trans- 
poses the names, calling the one with rays Hepatica minor 
umbellatus (apparently disregardful of grammatical endings) 
and that with “round heads” Hepatica minor stellaris— 
evidently a blunder of inadvertence, especially as others of a 
like nature occur in the work. He states that three of his 
hepatics are taken from Columna and a fourth from Bauhin, 
leaving Marchantia alone of which he had personal knowl- 
edge. Figures of Conocephalus and Pellia are subjoined, 
in addition to those of Marchantia alluded to above. 
In Tomus III of the “ Historia Plantarum Universalis” of 
Johann Bauhin and Johann Heinrich Cherler, a page is 
given up to “ Lichen sive Hepatica fontana.’ The authors 
indulge in a discussion of the Lichen of various predecessors, 
5London, 1640; pp. 1314-1316. 
6Embrun, 1651; p. 750, Tomus III. 
