46 W IE I S S 1 A. 



The curious peristome of this plant in an early stage re- 

 presents only a membranous ring lying horizontally within 

 the edge of the month of the capsule : this however as ma- 

 turity advances splits into 16 equal, short, and very obtuse 

 teeth, which become erect and afterwards reflex ed over the 

 mouth of the capsule. In this state Mohr seems to have 

 examined it, and consequently ranged it under his Gymno- 

 sloma* Schwaegrichen, taking into consideration the situa- 

 tion of the male flowers, has classed it under his Anictan- 

 gium. An evident annulus is present. The minute plants 

 most nearly resembling this, and only to be distinguished 

 from it by a close inspection; are IV. pusilla and Gymno- 

 stomum ienuc. 



10. W. cirrata', leaves broadly subulate, crisped when dry, their 



margins recurved; capsule ovate; lid rostrate. (TAB. XV.) 

 W. cirrata. Hedw. Sp. Muse. t. 12. /. 7. Moug. et Nestl n. 406. 

 Mniumcirratum, Linn. Grimmia cirrata. EngL Bot. .2356. Gr.Dick- 

 soni. EngL Bot. t. J420. Dill. Muse. t. 48. / 42. 

 HAB. On posts and rails, rarely on banks. 

 It will require a very attentive examination of the leaves of 

 this moss to distinguish it from IV. Crispula. In our plant 

 the leaves are shorter, wider, carinate, and have their mar- 

 gins recurved; while in IV. crispula they are truly, subulate; 

 rather canaliculate, and have no recurvation whatever of" 

 the margin. The capsules are alike in both. 



11. W. curvirostra ; leaves linear-subulate ; capsule ovato-cyiin- 



draceous ; lid rostrate. (TAB. XIV.) 



Bryum curvirostrum. Dicks. W. recurvirostra. Hedw. St. Cr. 

 v. 1. 1. 7- Grimmia recurvirostra. Turn. Muse* Hlb.p. 29. EngL Bot. 

 1. 1438. D?7/. Muse. t. 48./. 45. 



HAB. On sandy or gravelly moist banks. 



The stems of this plant vary exceedingly in length; and 

 its whole habit, as Mr. Turner judiciously observes, much 

 resembles that of the Tortulte, in company with several spe- 

 cies of which genus it may often be found growing. The 

 nerve is dark and strong, and gives the leaves a peculiar 

 rigidity. 



12. W. crispula] stems divided; leaves from a broad base, lan- 



ceolato-subulate, crisped when dry, their margins incurved; 

 capsule ovato-elliptical ; lid rostrate. .(TAB. XV.) 



W. crispula. Hedw. Sp. Muse. 1. 12. f. 1-6. Grimmia crispula. Turn. 

 Muse. Mb. p. 28. EngL Bot. t. 2203. 



HAB. On rocks. 



In addition to what we have said under W* cirrata, we 



