HEPATICAE 47 



SYNOPSIS OF GENERA*. 



Order I. JUNGERMANIALES. 



A. Acrogynae. 



Plant leafy. Archegonia terminal, i.e. produced from the apical cell of 

 the stem or branches. Sporogone consequently terminal at the end of the 

 stem (acrogenous), or of short lateral branchlets (cladogenous). 



a. Capsule 4-valved to the base. Elaters 2-coiled. 



I. Leaves t entire or bipartite, rarely 3 — 5 lobed, never incubous ; 

 inflorescence mostly acrogenous. 



1. Perianth present. 



x $ inflorescence acrogenous. 

 o Perianth terete. 

 § Leaves entire. 



! Leaves of the involucre as long as the cauline leaves. 

 (Fig. 41, C.) 



(i)J 1. Jungermania 



! ! Leaves of the involucre shorter and smaller than the cauline 

 leaves. 



(2) 2. Jamesoniella 



§§ Leaves 1- or multipartite. 



(1) 3. Anastrophyllum 



00 Perianth flattened, its mouth wide, bilabiate. 



§ Stem without rhizoids. (Plate 5 and Figs. 39 and 41, D.) 



(7) 4. Plagiochila 



§§ Stem creeping, with rhizoids. 



(2) 5. Leioscyphus 



000 Perianth triangular, its mouth trilabiate with laciniate lips. 



(5) 6. Lophocolea 



xx % inflorescence cladogenous, leaves mostly entire. 



(2) 7. Chiloscyphus 



2. Perianth none. 



x Sporogone not enclosed in a bag. 



(2) 8. Notoscyphus 



* By L. Diels (Marburg); the numbers of the S. A. species of the genera by 

 F. Stephani (Leipzig). 



f The leaves of liverworts are said to be "incubous" if the lower leaves overlap the 

 upper on the dorsal side of the stem : when the upper overlap the lower they are said to be 

 "succubous." 



; The figure in brackets denotes the number of species known from South Africa. 



