LOPHOZIA 108 
surrounds immature archegonia, when the contraction would natur- 
ally be less than at a little later period in the development of the 
perianth ; however, we suspect that there may be some difference 
inthis regard between Jungermannia Danicola and J. amplexicaulis. 
From Jungermannia sphaerocarpa Hook. (including J. lurida 
Dumort. and J. nana Nees), Jungermannia Danicola appears to be 
distinct in the transversely inserted, proportionally broader, more 
concave, more clasping, and more spreading leaves. 
21. LOPHOZIA Dumort. р. р. max. Кес. d'Obs. Jung. 17. 
1835. Schiffn.; Engler & Prantl, Nat. Pflanzenfam. 1°: 
84. 1305. 
Gymnocolea Dumort. р. p., Ё c. 
Diplophyllum Dumort. р. p., 1. c., 15. 
Jungermannia $ Lophozia Dumort. р. р. max. Syll. Jung. 53. 
1831. 
Jungermannia Dumort. Hep. Eur. 68. 1874. And of nearly 
all authors. 
_ Plants small to very robust. Stems creeping or ascending, 
simple, dichotomous, or with а few latero-ventral branches, often 
innovating from near the base of the perianth ; root-hairs. usually 
numerous. Leaves alternate, succubous, or transversely inserted, 
with 2-5 (commonly acute) teeth or lobes, plane or more often 
dorsally concave, sometimes complicate-bilobed but never acutely 
carinate ; walls of the leaf-cells thin or with trigones at the angles, 
never pitted or nodulose. Underleaves wanting or when present 
mostly small, lanceolate-subulate and entire, or bifid, or ciliate- 
ringed. Androecium terminal or median; 4 bracts sometimes 
with an additional tooth or lobe on the dorsal margin near the 
