108 THE JOUliNAL OF BOTANY 



Brotherus in the Musci describes twelve genera o£ Funariacece. 

 Since the publication of that work four new genera (including the 

 two published in this paper) have been added. Several of these are 

 characterized b}'- single and rather elusive generic characters, such as 

 the form of the calyptra and the character of the stomata. I have 

 thought it might be worth while to give a key to the genera, based 

 on that in Brotherus' work, and showing the places occupied by 

 those newly described : — 



Key to Genera of Funariacece. 



Primary stem rhizomatous, creeping. Seta 



short, gymnostomous I. Gigaspermese. 



Minute plants with persistent protonema, 

 almost stemless ; capsule sessile or sub- 

 sessile, mostly cleistocarpous, gymnosto- 

 mous *. II. Ephemereai. 



Stems erect ; protonema not persistent ; seta 

 usually elongate ; capsule always exserted ; 

 peristome often present ; cahq^tra usually 

 large, inflated and split at base III. Funariese. 



I. Gigaspermese. 



, J Leaves nerveless Gigaspermuni. 



[ Leaves nerved 2. 



{Lid not separating, capsule subsessile Lorentziella. 

 Lid separating, capsule exserted, with 



spongy exothecium Chamwhryum. 



IL Ei^hemerese. 



, r Lid not differentiated 2. 



\ Lid differentiated Nanohryum. 



I Calyptra cucuUate, reaching nearly to 

 middle of capsule Fpliemerella. 

 Calyptra mitriform, split at base, usually 

 " very small Ephemerum. 



III. Funariese. 



^ J Lid not separating 2. 



[ Lid separating 4. 



r Calyptra small, mitriform, covering only 



^ J apex of capsule 3. 



I Calyptra large, inflated at base, covering 



I all capsule PJiyscomitrellopsis. 



i Stomata superficial, pore small, elliptic ; 

 calyptra usually entire at base Physcomitrella. 

 Stomata partially immersed, pore an elon- 

 gate slit; calyptra split at base JPhyscomitridium. 



,\ Capsule immersed 5. 



I Capsule exserted 8. 



^ J Calyptra scarcely or not reaching below lid. 6. 



I Calyptra covering nearly half the capsule. 7. 



