Orthotrichum.^ D I PL O P ER I S T O M I. 133 



formed of a single row of elongated cellules. We may here 

 observe, that Drs. Mougeot and Nestler, who published in 

 their Stirpes a plant which they consider O. Ludwigii, after- 

 wards on ascertaining that it had no internal peristome, referred 

 it to O. clausum of Hornschuch's MSS. We have quoted the 

 latter plant, with a mark of doubt, though we cannot help 

 believing, from our own experience, that the plant of Mougeot 

 and Hornschuch is the same as ours, agreeing with it in every 

 respect, save in the alleged absence of an inner peristome. 



We have quoted, also dubiously, the figure of Sturm, as it 

 by no means agrees with any of our specimens, whether foreign 

 or British ; the magnified capsule being of a different form and 

 deeply furrowed. It is also our opinion that the Splachnum 

 Wulfenianum, figured in Schwaegrichen's Suppl. is nothing but 

 an injured specimen of this Orthotrichum^ as it very much re- 

 sembles it in the leaves, capsule, and peristome, 

 13. O. crispum; stems erect, leaves lanceolate-subulate much 



crisped when dry, capsule oblongo-clavate furrowed, teeth of 



the peristome eight geminate patent reflexed, calyptra very 



hairy. (TAB. XXI.) 



Orthotrichum crispum. Hedw. St. Cr. v. 2. t. 35. Sp. Muse. t. 



162. Schwaegr. Suppl v. 1. P. II. p. 23. Smith, Fl. Brit. p. 1266. 



Engl. Bot. t. 996. Moug. et Nestl. n. 30. Sturm, Deutschl FL Funck, 



Deutschl Moose, t. 23. / 1. Hook. Fl. Scot. P. II. p. 137. Hobson, 



Brit. Mosses, v. 1. n. 54-. Drummond, Muse. Scot. v. 1. n. 58. Am. 



Disp. Muse. p. 18. Hook, and Grev. in Edin. Journ. of Science, v. 1. 



p. 126. 



Ulota crispa. Mohr Brid. Meth. p. 112. 

 Orthotrichum curvifolium. Wahl. Lapp. p. 365. ? 

 HAB. Abundant on trees ; rarely found upon walls and 

 stones. 



This can scarcely be confounded with any British species, 

 having striking characters in its large size, very crisped foliage, 

 and exserted fruitstalks. The stems form dense, prominent 

 tufts, conspicuous from their rich yellowish, or reddish green 

 colour. The sterile plants have sometimes a creeping habit; 

 leaves exceedingly crisped, fruitstalks long and very numerous. 

 As far as we can judge from the imperfect specimens which we 

 possess of 0. curvifolium, it appears in no respect to differ 

 from 0. crispum. 



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