TORTULACE.E.] 230 [Mollia. 



(ScmMP.)pallidiseta (H. MUELL.), undata (ScniMP.), all near M.crispula, and 

 cuspidata (ScniMP.), and Bambergeri (ScniMP.), near brachydontia ; in Tortella, 

 M. humilis (HEDW.), B. caspitosa (SCHWAEG.) near flavo-virens, and inflexa 

 (BRUCH), near inclinata. 



It is very probable that several of these, on careful examination, will 

 not be able to hold their ground as species. 



CLAVIS TO THE SPECIES. 



Sect. i. HYMF.NOSTOMUM. Plants small, nearly simple; leaves linear or lanceolate; 

 caps, with a persistent lid, or closed by an epiphragm, or gymnostomous, or with a peristome of 

 16 small teeth. 



Capsules immersed, lid not falling off. 



Leaves lanceolate-subulate, with involute margins. crispa. 



Leaves lanceolate acute, with plane margins. 



Leaves recurved, perich. bracts long erect. multicapsularis. 



Leaves patent, perich. bracts shorter spreading. Mittenii. 



Capsule exserted, lid falling off. 

 Leaves with plane margins. 



Capsule not elevated above perich. bracts. rostellata. 



Capsule elevated on a longer seta. 



Gymnostomous, leaves squarrose. squarrosa. 



Peristomate, leaves erecto-patent. rutilans. 



Leaves with involute margins. 



Gymnostomous, slightly branched, lax leaved. inicrostoma. 



repeatedly branched, dense leaved. tortilis. 



Peristomate, leaves linear-lanceolate. viridula. 



Sect. 2. EUCLADIUM. Plants larger, dichotomously branched ; leaves accrescent upward 

 and comant, fragile, thick nerved ; peristome O, or of 16 slender papillose teeth. 

 Nerve vanishing below apex. 



Stem short, leaves lingulate obtuse. 



Loosely matted, lid conical. tenuis. 



Densely pulvinate, lid rostrate. calcarea. 



Stem elongated, leaves linear-lanceolate, rather obtuse. ceruginosa. 



Nerve excurrent. 



Leaf with basal margin serrate. verticillata. 



Leaf with basal margin entire. 



Apex cucullate, boat shaped. crispula. 



flat, obtuse mucronate. litoralis. 



flat, acute acuminate. brachydonila. 



Sect. 3. TORTELLA. Plants robust, dense-leaved ; leaves long, cirrhato-crispate when 

 dry, hyaline at base. Peristome of longer teeth, sometimes twisted. 



Basal hyaline cells not extending higher up the margin than at the nerve. 



Leaves long linear undulate, base equal, margin coarsely crenulate. tenuirostris. 

 Leaves shorter lanceolate subulate, not undulate, base wider upward, 



margin entire. hibernica. 



Basal hyaline cells ascending higher at the margin. 



Apex of leaf obtuse, cucullate. flavo-mrens. 



Apex of leaf acute. 



Leaves short with short points. 



Leaves rigid, with reddish nerve, arcuato-incurved when dry. nitida. 

 Leaves soft, with green nerve, cirrhato-crispate when dry. inclinata. 

 Leaves long with lanceolate-subulate points. 



Leaves flexuose, flaccid, undulate. tortuosa. 



Leaves erect rigid, straight. fragilis. 



Sect. i. HYMENOSTOMUM (Brown). Plants small, simple or with 

 a few innovations ; leaves linear or lanceolate. Capsule phascoid with a 

 persistent lid, or exserted and gymnostomous with or without an epiphragm, 

 or with a peristome of 16 more or less perfect lanceolate teeth. 



