40 MARCHANTIACEAE 
gonium. Pseudoperianth wanting. Peduncle from the apex of the 
thallus-lobe, with a single root- hair furrow, * destitute of assimila- 
tive tissue, surrounded at the base by a few narrow, whitish or 
purple paleae, the receptacle conspicuously involucrate when young 
and sessile. Sporogonium consisting of a subglobose capsule, a 
scarcely perceptible pedicel, апа а large foot. Capsule only par- 
tially filling the involucral cavity, yellowish-green, the apical por- 
tion of its wall falling away in fragments at dehiscence, leaving be- 
hind a subhemispherical urn with an erose-dentate margin, Ше. 
cells without annular or spiral fibers, those in the apical region 
with trigones or sometimes exhibiting] irregular nodulose thicken- 
ings in the lateral walls. Spores yellow or brownish, more or less 
distinctly tetrahedral, all the faces with rather large often irregular 
areolae, the angles pellucid- -margined, membrane - finely granulate. 
Elaters 2-4- (mostly 3-) spiral. 
I. REBOULIA HEMISPHAERICA (L Raddi, 4. c. 
Marchantia hemisphaerica L. Sp. Pl. 1138. 1753. 
Asterella hemisphaerica Pal. de Beauv. Encyc. Meth. Bot. 
Suppl. £: $02. 1810. 
Thallus 6–30 mm. long, rather pale green above, the segments 
emarginate at apex, соса ог obcordate, жыз commonly 
elongated, margins undulate-crenulate: monoicous : peduncle 
mostly 1.5-3 cm. in length, rarely longer : spores 65-80 и 
зи е 300-450 # long, 10-12 и in maximum width, Ше apices 
su 
A cosmo species, but the only Californian station we can 
cite is Folsom (Katharine Brandegee). 
5 GRIMALDIA f Raddi, Opusc. scientif. di Bologna, 2: 356. 
1818.1 
. Thallus somewhat firm and rigid, broadly costate or some- 
times ut carinate, dichotomous and often innovating at the 
egi in m m y^ the Marchantiaceous genera in Engler & Prantl, Nat. 
<“ Wurzelrinne ” to Аедошћа, but we find it always pres- 
25,4 
en, ұш а by Nees, алы. and others, both in European and American forms 
14 
Sehr те ви ро unmindful of the fact that Grimaldia is said to have been used by 
ips in : as a generic name for certain species of phanerogams, which 
“ writers у been almost universally referred to Cassia or to Chamaecrista 
(Breyne, ; » 1794) here can, therefore, be bt that a literal 
2 Ми ene of Article IV. of the Rochester Code would call for the disappearance of 
T " aldia ke on names of genera of Hepaticae, and ind rom al в 
: re e strictly historical, unless, perchance, some one should find grounds 
or recognizing a ain the Grimaldia chrank as agenus. Butuntil кене РӘ actu- 
ally pro oses to revive the older Grimaldia—if that time ever comes—it s 
be conducive to clearness to retain in 
the o 
ally known to botanists for the past e t eight 
| See footnote under Љубо uia желе 
us to 
sgi ** Grimaldia ”’ that he bó resti gener- 
