BOTANY 



MUSCI 



The mosses of Derbyshire have been to a large extent investigated, 

 and results published by Mr. Whitehead in the Journal of Botany for 

 1896 (p. 193), and the Rev. A. Ley contributed a MS. list : these have 

 been combined with some other records and published in the Naturalist 

 (1899) by the Rev. W. H. Painter. Professor T. Barker, who has given 

 me valuable assistance in the drawing up of this article, has added a list 

 of his findings, and these, together with a few more from other sources 

 or discovered by myself, bring up the total number of species to 324. 

 There are a few which are of exceptional interest from their extreme 

 rarity, notably Porotricbum angustifolium, Dixon, for which the locality 

 in Cressbrook still remains the only known station. Other species of 

 great rarity are : Seligeria tristicha, B. & S. ; Ditricbum tenuifolium, 

 Lindb. ; Campylopus setifo/ius, Wils. ; Grimmia Stirtoni, Schimp. ; Pottia 

 latifolia, C. M. ; Tortula brevirostris, B. & S. ; Weissia squarrosa, 

 C. M. ; Pleurochcete squarrosa, Lindb. ; Zygodon Stirtoni, Schimp. ; Dis- 

 celium nudum, Brid. ; Pbyscomitrella patens, B. & S., var. Lucasiana, 

 Schimp. ; Physcomitrium spharicum, Brid. ; Amblyodon dealbatus, P.Beauv. ; 

 Bryum uliginosum, B. & S. ; B. ajfine, Lindb. ; B, capillare, L., var. 

 Fercbelii, B. & S. ; Fontinalis Dixoni, Cardot ; Eurhyncbium circinatum, 

 B. & S. ; Amblystegium Sprucei, B. & S., and confervoides, B. & S. ; Hypnum 

 cuspidatum, L., var. ccespiticium, Whiteh. There are some others which 

 are notable as being rare in Derbyshire, though not so much so 

 elsewhere, such as Andrecea petropbila, Ehrh. ; A. crassinervia, Bruch. ; 

 Tetraphis Bro'wniana, Grev. ; Catharinea cra/w, James ; Diphysciumfoliosum, 

 Mohr. ; Cynodontium Bruntoni, B. & S. ; Blindia acuta, B. & S. ; Dicrano- 

 dontium longirostre, B. & S. ; Fissidens crassipes, Wils. ; Hedivigia ciliata, 

 Ehrh. ; Pottia Starkeana, C. M. ; Tortula lamellata, Lindb. ; T. mutica, 

 Lindb. ; Weissia tenuis, Schrad. ; Tricbostomum tenuirostre, Lindb. ; Ulota 

 Drummondii, Brid. ; Orthotrichum Sprucei, Mont. ; O. tenellum, Bruch. ; 

 Webera polymorpha, Schimp. ; Bryum murale, Wils. ; Mnium serratum, 

 Schrad. ; Neckera pumila, Hedw. ; Antitrichia curtipendula, Brid. ; Cylin- 

 drothecium concinnum, Schimp. ; Pylaisia polyantha, B. & S. ; Bracbythecium 

 albicans, Neck. ; B. illecebrum, Schwgr. ; Eurbyncbium striatulum, Spruce ; 

 E. megapo/itanum, Bland. ; Plagiotbecium pulcbellum, B. & S. ; Amblystegium 

 varium, Lindb. ; A. irriguum, B. & S. ; Hypnum vernicosutn, Lindb. ; H. 

 incurvatum, Schrad. It should be added that Webera cucullata, Schimp., 

 published in the Handbook of British Mosses, is now considered by Messrs. 

 Dixon and Barker to be only a form of W. nutans. Andreeea alpina and 

 Webera polymorpha must also be withdrawn from the list, both records 

 being probably erroneous. Limitation of habitat as a feature is more 

 pronounced in the moss-flora than in the phanerogams of Derbyshire. 

 Thus as many as 49 species are found on the limestone alone, 1 8 species 

 on both limestone and Permian, one on Permian only, yielding a total of 

 68 limestone mosses, though it must be mentioned that some of these 

 species are by no means restricted to limestone in England generally. 



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