492 INTRODUCTION TO CRYPTOGAMIC BOTANY. 



inner peristome arises, deeply divided into sixteen narrow 

 keeled processes; Dij^locomiuni longisetum is a very doubtful 

 native ; all may be considered as European forms. 



22. FuNARiEi, Br. & Sc, Mont. 



Sporangium pyriform, straight or oblique, smooth or striate; 

 peristome variable ; calyptra inflated below, subulate above, 

 vesicular, split at the base. Sub -biennial, monoecious ; reticula- 

 tion loose. 



546. This tribe consists of three genera — Physcomitrium, 

 Entosthodon, and Funaria, all agreeing in the vesicular in- 

 flated calyptra, and annual or sub-biennial habit, but in 

 Physcomitrium there is no peristome ; in Entosthodon the 

 peristome is single, and in Funaria double. Valentine has 

 carefully analysed the young fruit of Funaria hygrometrica, 

 Linn. Tr., vol. 17, and has shown that the base of the young 

 fruitstalk burrows down into the receptacle.* Physcomitrium 

 is a European or N. American genus, with representatives in 

 India, South America, and New Zealand, where P. pyri- 

 forme appears under a dwarfed form with the Indian P. Per- 

 rottetii. P. pusilluTYi has the calyptra but slightly inflated. 

 Entosthodon has but one European species. New Zealand 

 has one, and Peru three species, while two appear in Algiers. 

 The species of Funaria are widely spread. F. hygrometrica 

 is cosmopolite, and the other species have mostly a wdde dis- 

 tribution, though New Zealand produces two distinct sj)ecies. 



23. Bartramiei, Br. & Sc, Mont. 



Sporangium spherical, mostly striated ; peristome variable, 

 but resembling that of Bryei ; leaves rigid, lanceolate, keeled, 

 denticulate. Perennial. 



547. These mosses have a peculiar habit, which, in conjunc- 

 tion with their spherical and mostly striated fruit, distinguishes 

 them at once from Bryei, with which they are connected by 



* An analysis will also be found in Scliimjier's Recherches sur les 

 Mousses. Compare also remarks on Funaria, in Wilson's Introduction 

 to Bryologia Britannica. One peculiarity of structure consists in the 

 columella not arising at once from the axis of the peduncle, but being 

 merely connected with it by a few loose threads. A different structure 

 is figured by Payer. 



