100 HYPNUM, 



purple colour. In Britain we believe the fruit to be very rarey 

 but it is common among calcareous rocks on the Swiss alps* 



22. H. sericeum ; leaves erecto-patent, lanceolate, acuminated^ 

 entire, striated, nerve running to three-fourths of the lengthy : 

 capsule ovato-cylindrical, erect ; lid conical. (TAB. XXV.) 



H. sericeum. Linn. Sp. PL p. 1596. Turn. Musc<Hib.p. 138. Engl 

 Hot. t. 1445. Leskea sericea. Hedw. St. Cr. v. 4. t. 17- Moug. et \ 

 ffestl. n. 2'25.Dill. Muse. t. 42./.59. 



HAB. On trunks of trees, walls and rocks* 

 Stems creeping ; branches numerous, erect* 



23. H. lutescens $ leaves erecto-patent, lanceolate, acuminated^ j 

 entire, striated, nerve disappearing below the point ; cap- 

 sule ovate, cernuous ; fruitstalks rough; lid conico-acumi--! 

 Tiated. (TAB. XXV.) 



H. lutescens. Huds. Angl. ed. 1. pA2\, Hedw. St< Cr. v. 4. 1. 16.1 

 Turn. Muse. Hlb. p< 174. Engl, Bot, t. 1301. Moug. et Nestl. n. 334. j 



HAB. Banks and stems of trees and bushes near the 

 ground, common. 



Stems much branched, branches spreading. Leaves 

 sometimes slightly serrulated under a microscope, of a bright; 

 yellow green colour. We have already observed how' nearly; 

 this species is allied to H. salelrosum of Mohr, (H. plu- 

 mosum HedwJ in so much that they who have considered; 

 them to be distinct can discover no other character by whichj 

 they can be known, except the smooth fruitstalk and some^ 

 what shorter lid of the latter. The inner peristome has* 

 been figured by Mr. Sowerby as that of a Leskea ; but in 

 all the specimens that we ha've examined there may be ob- 

 served short^ filiform processes between each segment of the* 

 inner peristome which constitute it a true Hypnum. We 

 have received a specimen from Mr. Hobson of Manchester, 

 unfortunately destitute of lids to the capsules, without which? 

 we can find no discriminating character but the smooth 

 fruitstalks to keep it distinct from our plant* This is surely 

 the H. salelrosum of Mohr, and plumosum of Hedw. ; anc 

 it appears to be a closely connecting link between H< lutes-' 

 cens and H. nilens* 



24. H.nitens; leaves erecto-patent, narrow, lanceolate, acumi- 

 nated, nearly entire, striated, nerve running nearly to thi 

 summit; capsule oblongo-ovate, curved, cernuous; fruit 

 stalks smooth ; lid conical. (TAB. XXV.) 



H. nitens. Schreb. Fl Lips. p. 92. Hedw. Engl. Bot. t. 1646.-S 

 Dill. Muse. t. 39./.S7. 



HAB. Bogs in Scotland. Mr. Dickson< Near Acle ; Nori^ 



