224 Mr S. Grieve on the Flora of Colonsay and Oransay. 



Moss Flora of Colonsay and Oransay {Part II.). 



SECTION I.— ACROCARPI. 

 SPHAGNACEiE. Tribe 1. 



Sphagnum, Dill. 



cuspidatum, Ekrh. 



Weissiace^. Tribe 3. 



Dichodontium, ScJipr. 



pellucidum, L. Ou moist ground 

 near Loch Fada, Colonsay. 

 Dicranella, Schpr. 



heteromalla, Hedw. 

 Dicranum, Hed. 



fuscescens, Turn. 

 Campylopus fragilis, B. & S. 



Do. do. var. deusus, B. & S. 



PoTTiACEiE. Tribe 7. 

 Pottia, Ehrh. 



Heimii, Hedw. Growing in crevices 

 of ]-ocks near Loch Fada, Colon- 

 say. 

 Ditrichum, Timm. (Leptotrichum, 

 Hampe), 

 rtexicaule, Schwg., var. densum. 

 This sub-variety does not appear to 

 have been given in any of the British 

 Moss Catalogues until the second edi- 

 tion of the London Catalogue was pub- 

 lished this spring, where it is noted, 

 and is mentioned as being found in 

 several of the Watsonian districts in 

 Britain, but it does not seem to have 

 been observed in the West Highland 

 district previously. We found it grow- 

 ing in crevices of the rocks near the 

 shore, upon a soil composed of minute 

 fragments of sea shells, but it did not 

 apj)ear to be abundant, and was without 

 fruit. 



Barbula, Hedw. (Tortula. ) 



ruralis, Schwg., var. rupestus. 

 intermedia, Brid. 

 Usually found growing upon lime- 

 stone walls, but here it is growing among 

 the loose sand, which is comjiosed of 

 comminuted sea shells ; and upon this 

 peculiar form of lime it finds the condi- 

 tions that enable it to exist. 

 Ceratodon, Brid. 

 purpureus, L. 



Grimmiace^. Tribe 9. 



Racomitrium, Briil. 



aciculare, L. 



canescens, Hedw. 

 Zygodon, H. <i- T. 



viridissimus, Dicks. 

 This moss is foimd growing in semi- 

 darkness upon the walls of the Crystal 

 Spring Cavern, Colonsay, along with 

 Eurynchium pumiluin. 

 Zygodon viridissimus, var. rupestris, 



Limlb. 

 Found on the wet rocks at the side of 

 waterfalls, on a small stream that runs 

 into Loch Fada (east side). 



Ulota, Mohr. (Ortliotrichum). 

 jjliyllantha, Brid. 

 Is very plentiful, growing upon the 

 bark of ash trees near Colonsay House, 

 but is also found growing on old walls 

 and rocks. Its peculiarity is that its 

 fruit is unknown, and that it propagates 

 its sjiecies by " Gemmoe " that cover the 

 apex of the stems, which are generally 

 exserted ; this gives the appearance of 

 a black speckle on each, its character 

 only being distinguishable to the eye 

 after a very close and careful inspection, 

 but with the aid of a pocket lense the 

 " Gemmae " are easily seen. 



FuNAKiACE^;. Tribe 11. 

 Physcomitrium, Brid. 



jjyriforme, L. 

 Funaria, Schreb. 



hygrometrica, L. 



BRYACEiE. Tribe 13. 

 Bryiim, Dill. 



pendulum, Hornsch. (Cemuum). 

 Growing in crevices of rock near Loch 

 Fada. 

 Br yum alpinum, L. 



This moss is rare in fruit, but we 

 found splendid specimens on Colonsay 

 in fructification. It is common on both 

 islands ; but on wet rocks, near Scala- 

 saig, its velvety masses are so beautiful 

 during spring that even the most 

 unobservant person must remark them. 

 The islanders sometimes use it for dye- 

 ing purjDOses, and they say it gives a 

 most beautiful dark bro'svn colour. 



PoLYTRiCHACE^. Tribe 16. 

 Pogonatum, P. Beauv. 

 nauum, Neck. 

 aloides, Hedw. 

 SECTION III.— CLADOCARPL 

 RiPARiACE^. Tribe 21. 

 Fontinalis, Dill. 

 antipyretica, L. 

 Cryph^ace^. Tribe 22. 

 Hedwigia, Ehrh. 

 ciliata, Dicks. 

 SECTION IV.— PLEUROCARPL 

 HYPNACBiE. Tribe 28. 

 Camptothecium, Schpr. 



lutescens, Hmls. 

 Brachythecium, Schpr, 



velutiuum. L. 

 Eurynchium, Schpr. 

 myosuroides, L. 

 striatum, Schreb. 

 Hypuum, Dill. 



aduncum, Hedw. Non. Bry. Brit. 

 Do. var. Kneittii, Bry. Ewr. 

 molluscum, Hedw. 

 palustre, L. 

 poly,L,'amuni, B. <£• S. 

 stellatum, Schreb. 



