, T 
112 Rhodora [JUNE 
less acuminate lobes, the bracteole is bifid in much the same way as 
the leaves, and the perianth bears one or more usually broad wings 
along its angles. Additional differential characters taken from the 
sporophyte may be quoted from Schiffner. According to his account 
the spores in L. cuspidata average about 16 u in diameter, and the 
elaters have two spirals throughout their entire length; in L. alata, 
on the other hand, the spores usually measure 19-21 u in diameter, 
and the elaters at one or both ends have very often a single spiral for a 
considerable distance. Unfortunately the Simsbury specimens lack 
capsules, so that these observations could not be confirmed. In their 
gametophytic characters, however, they agree closely with the follow- 
ing English specimens: near Castleton, Derbyshire (H. W. Pearson, 
distributed in Hep. Europ. Exsic. 275); Cuckfield, Sussex (W. E. 
Nicholson, communicated by Miss Lorenz). 
Both L. alata and L. cuspidata are autoicous in their inflorescence 
and on this account frequently bear perianths. In L. bidentata (L.) 
Dumort., which agrees with them in many points, the inflorescence is 
dioicous and perianths are rarely developed. In the form of the 
leaves L. bidentata usually resembles L. alata more closely than it does 
L. cuspidata, but the leaf-cells are smaller than in either of the autoi- 
cous species and measure 25-30 u in the middle of the leaf. The 
distribution of L. bidentata in New England is very incompletely 
known. Although it has been reported from every state except New 
Hampshire, the writer has seen specimens from Massachusetts and 
Connecticut only. It seems to be most at home on moist or wet 
sandstone. 
3. CEPHALOZIA CATENULATA (Hüben.) Spruce, On Cephalozia 33. 
1882. Jungermannia catenulata Hüben. Hep. Germ. 169. 1834. 
J. reclusa Tayl. Jour. Bot. 5:278. 1846 (in part). Cephalozia 
reclusa Dumort. Hep. Eur. 92. 1874. C. serriflora Lindb. Medd. 
Soc. F. et Fl. Fenn. 3:188. 1878. C. virginiana Spruce, On Cepha- 
lozia 37. 1882. 
Hübener's Jungermannia catenulata has been the source of con- 
siderable confusion to students of the Hepaticae. It was based on 
specimens collected in western Germany, the habitat being described 
as “Torfboden in Sümpfen." According to the original description 
the lobes of the perichaetial bracts were entire. Spruce considered 
the species synonymous with Taylor's J. reclusa (in a restricted sense) 
and with Lindberg's Cephalozia serriflora, a species with dentate or 
