NEW HEPATIC^B. 371 



Patches wide, whitish-green. Stems 1 inch long; the 



lower branches short, the upper frequently elongated into 



flagelliform terminations. Leaves and stipules remarkably 



concave, so that when dry they appear as corrugated sacks, by 



which character and by its more distant branches the plant 



may be distinguished from its nearest ally, L. reptans, Nees. 



8. L. chordulifera, Tayl. ; caule implexo, adscendente, pin- 



nato ; ramis apice attenuatis, decurvis ; foliis obliquis, sti- 



pulisque arete imbricatis, erecto-patentibus, quadratis, 



quadrifidis, basi utrinque subdentatis, segmentis lanceo- 



latis ; calyce ventrali, cylindraceo, acuminato, subplicato, 



incurvo. 



Hab. Chonos Archipelago, n. 461 ; Darwin, Hook. Herb. 



Tufts loose, whitish olive. Stems nearly 2 inches long, 

 regularly pinnate, the branches attenuated, deflexed. Leaves 

 concave, their bases wide and furnished at each side with 

 one or two distinct teeth ; segments of leaves and stipules 

 unequal. Perichsetial leaves erect, their segments dentate. 

 Nearly allied to L. cupressina, Lindbg., but distinct by the 

 dentate bases of the leaves, by their closer imbrication, and 

 by their cellules being much more minute, although the spe- 

 cies is far larger. 



9. Mastigobryum, Nees. 



1. M. pycnophyllum, Tayl. ; caule laxe ceespitoso, procum- 

 bente, ramoso ; ramis basi subdenudatis ; foliis arete im- 

 bricatis, subsecundis, patentibus, subrecurvis, lineari-ob- 

 longis, apice subrotundatis, subtridenticulatis, medio grosse 

 cellulosis ; stipulis minutis late quadrato-rotundatis eroso- 

 denticulatis. 

 Hab. With Jung, stolonifera, Sw. Jamaica; Swartz, Hook. 

 Herb. 



Patches pale but dusky olive-green. Shoots about 3 lines 

 long, usually divested of leaves at the bases ; towards the 

 middle having flagelliform branches. Leaves closely imbri- 

 cated, at right angles to the stem, their tops slightly recurved ; 

 they have large cells along their awes. This is related to M. 



