KEY TO THE GENERA AND SPECIES OF BRITISH HEPATICli 155 



Stephani in his Species Hepaticanim, in preference to what has been 

 generally named Mdrckla or DilcBna. Ricciorarpu^ natans has been 

 inchided witli lUcria for the purposes of the key. Jnnf/t^nnmia 

 crenubita Sm. will be found under ?Jucah/x. Maraupdla comerta 

 and M. idpina are placed under Acolca. M. rnuiluta is omitted, as 

 the evidence for its occurrence in the British Isles is considered 

 insufficient. I have also followed Stephani in considering our 

 lUccia nup-ella to be different from De Candolle's plant, and have 

 employed the name B. Pearsoni given to it in Species Hepaticarum. 

 The following contractions have been used : — 



ant. . antical. post. . jwsticaL 



int. . internal. occ. . occasionally. 



m.orl. more or less. stips. . stipules. 



per. . perianth. usu. . nsualiy. 



GENEEA. 



. f Plant foliose 2 



^{Plantfrondose 48 



n J Leaves and stips. equal, or nearly equal, in size and shape 3 



1 Leaves and stips. (if present) not resembling each other 12 



o (Leaves entire or repand dentate Scalia Hoolisri 



(Leaves lobed 4 



. f Leaves 2-lobed 5 



JLeaves 3-4-lobed 9 



- (Lobes entire or slightly dentate 6 



I Lobes spinous-dentate or lacininte-ciliate 8 



{Leaves usu. falcate-secund with long subulate acuminate segments ... 

 Herherta adunca 

 Leaves erect or slightly secund, segments not subulate 7 



„ (Leaves § bilobed, usu. closely imbricate, rarely distant Anthelia 



^^ Leaves ^-| bilobed, distant, plant smaller Hijgrohiella laxi folia 



Leaves spinous-dentate, plant red Mastigojjhora Woodsii 



Leaf-segments with long hair-like processes, plant cream-coloured or 



pale green Tricliocolea tomentella 



qj Leaves divided to base into setaceous segments 10 



(Leaves not divided to base into setaceous segments 11 



[Segments incurved, mostly 2 cells broad at base Lejndozia setacea: 



10 \ Segments spreading, 1 cell broad throughout... J5Ze/>7Mro.s^om(X tricho- 

 \ pi I y Hum 



Leaves erect, segments entire or spinous-dentate Cliandonanthus 



11-1 st'tiformis 



Leaves almost transverse, segments longly ciliate BleijJiarozia 



12 



f Capsules opening irregularly Fossomhronia 



(Capsules opening with four entire valves 1.3 



, q f Leaves complicato-bilobed 14 



( Leaves not complicato-bilobed 27 



, , j Post, lobe smaller than ant. lobe 15 



(Post, lobe equal to or larger than ant. lobe 20 



M 2 



