30 MUSCI. [Orthotrichum. 



patent, straight and rigid when dry ; capsule nearly sessile, fur- 

 rowed ; peristome single ; calyptra at length quite glabrous. 

 Hoff. Germ. v. 2, p. 26. Muse. Brit. ed. 2, p. 125, t. 21. 

 On rocks, especially limestone ; not uncommon. 



2. O. anomalum, Hedw. Leaves ovato-lanceolate, erecto- 

 patent, straight when dry ; peristome single ; calyptra somewhat 

 hairy. Hedw. St. Cr. v. 2, t. 37. Muse. Brit. ed. 2, p. 125, t. 21. 



On rocks, especially limestone ; not uncommon. The ridges on 

 the capsule are most evident near its mouth, where they are reddish 

 and prominent ; in some varieties the capsule is not evidently tuber- 

 culated. 



3. O. affine, Schrader. Leaves broadly lanceolate ; capsule 

 deeply furrowed, nearly sessile ; teeth of the peristome eight, 

 geminate, cilia eight, filiform ; calyptra hirsute. Schrad. spicil. 

 p. 67. Muse. Brit. ed. 2, p. 127, t. 21. 



On trees ; not uncommon : varies in size. 



4. O. diaphanum, Schrader. Stems very short; leaves lan- 

 ceolate acuminate, their points diaphanous ; teeth of the peris- 

 tome equidistant ; cilia 16 ; calyptra slightly hirsute. Schrad. 

 spic. p. 69. Muse. Brit. ed. 2, p. 128, t. 21. 



On trees, common ; more rare on stones, as at Killiney on granite. 



5. O. rivulare, Smith. Stems procumbent ; leaves broadly 

 lanceolate, obtuse; cilia 16, setaceous; calyptra glabrous. Sm. 

 Flor. Brit. p. 1266. Muse. Brit. ed. 2, p. 128, t. 21. 



On stones in streams ; not uncommon. 



6. O. striatum, Hedw. Leaves lanceolate, patent, straight 

 when dry; capsule slightly striated; cilia 16, moniliform ; 

 calyptra slightly hairy. Hedw. St. Cr. v. 2, t. 3. Muse. Brit, 

 ed. 2, p. 1 28, t. 21. 



On stones and trees. 



7. O. Hutchinsice, Smith. Leaves lanceolate, erect, rigid; 

 capsule clavate, furrowed ; cilia 8, calyptra very hairy. Eng. 

 Bot. t. 2523. Muse. Brit. ed. 2, p. 131, t. 21. 



On large stones, near Bantry, Miss Hatchins ; in similar places in 

 the counties of Wieklow and Kerry ; not uncommon. The stems 

 are remarkably dark, almost black below, their tops of a brownish- 

 yellow. 



8. O. crispum, Hedw. Leaves lanceolato-subulate, much 

 crisped when dry ; oblongo-clavate, furrowed; teeth of the pe- 

 ristome 8 geminate ; cilia S ; calyptra very hairy. Hedw. St. 

 Cr. v. 2, t. 35. Muse. Brit. ed. 2, p. 133, t. 21. 



On trees, common ; sometimes on stones. A variety occurs at 

 Askew wood, near Sneem, County Kerry, ripening on the same trees 

 a month or two earlier than the common kind, and with the calyptra 

 nearly glabrous, the few hairs never overtopping it ; the peristome 

 larger ; each of the eight geminate teeth split nearly half-way down ; 

 the lid short. 



