EXPLANATION OF THE PLATES. 89 



Plate X. 



POTTIES. 



Chaeacteeistics op Sdb-Oedee. 



Plants minute, annual or biennial; tufted, on earth and walls. Capsule ovate, 

 erect or slightly oblique. Monoicous, sometimes synoicous. Leaves nerved ; areolae 

 (Pig. 1. a), oblong- quadrate. 



POTTIA. 



Generic Character (Fig. 1, b, c, d) . 



Capsule ih) ovate ; peristome none ; lid conical ; beak oblique ; columella (c) 

 with a broad summit, which fills the mouth of the capsule. Spores [cl) large. 

 Perichsetium none. 



Fig. 2. Pottia caviiolia. 



Oval-leaved Pottia {a) . 

 Colour. Dull green. 



Stems. Very short. 



Leaves. Oval, bristle-pointed, with singular appendages Kke green bags, to 



the upper side of the nerve, {lamellce) , apparently masses of colouring 



matter. 

 Capsule. Ovate; seta short; lid oblique. Spruig. 

 Locality. Earth. 

 Variety. Pottia gracilis, (Fig. 3, a), stems longer; leaves (b) looser (lax); capsule 



on long pedicel. 



Fig. 4. Pottia minutula. 



Smallest PotUa (a) . 

 Colour. Dull green. 

 Stems. Extremely short. 



