64 



145. Floating in water. Branches thread-like and naked. Leaves 

 having a keel. Capsule nearly sessile. Outer peristome of six- 

 teen very long teeth, which are red and point inwards. Inner 

 peristome of sixteen interlacing threads. FONTINALACE.E. 

 Growing 6n land. Leaves more or less concave, with no keel. 

 Capsule having a pedicel. Peristome toothed, with or without 

 threads. 



Leaves arranged in two opposite ranks, with a third, stipule-like, 

 intermediate series on the lower side of the stem. Plants grow- 

 ing in equatorial or southern latitudes. HYPOPTERYGIACK i:. 



Leaves arranged spirally, or in many ranks. 



Capsule curved. Pedicel long and bent. 146 

 Capsule straight. Pedicel of moderate length, fleshy. 



Stem fleshy. Calyptra conical and mitre-form, lobed at base. 



Pedicel thick. Capsule black. HOOKERIACEJ:. 

 Stem slender. Calyptra hood-like. Pedicel slender. Capsule 



brown. NECKERACE.E. 



146. Calyptra mitre-form. Pedicel very short. NECKERACKE. 

 Calyptra hood-form. 



Inner peristome composed of divisions with keels, and having a 



common membrane at base. 147 

 Inner peristome made up of threads, without a common membrane 



at base. 



Outer teeth of the peristome lanceolate; inner hairs remote, shorter 

 than the teeth. Cellular tissue loose. FABRONIACE.K 



Outer teeth of the peristome awl-shaped, having keels; inner hairs 

 of about the same length as the teeth. Cellular tissue firm. 



NECKERACE.E. 



147. Leaves with a roughened surface, deep green or black. 



LESKEACE.K. 

 Leaves not roughened, green or yellow, often silky. HYPNACE.E. 



