332 THE MOSSES OF THE UPPER DOVEY. fragilifolia (Juratz). Found on Bala limestone where it crosses Cwm Dyniewyd and Blaen-y-pennant. — B, subulata L. Frequent on walls and banks. — B. ruralis L. Ceratodon purpureus L. Common on banks, walls, and sandy ground. Encalypta streptocarjm Hedw. Abundant on walls and Bala limestone. Grimmia apocarpa L. Very common on rocks. — Var. rivularis Brid. Abundant on mill-wheel at Aber Cowarch, and on boulders in Dovey. — Var. pumila Schpr. Growing frequently with G. apo- carpa. — G. torguata Grev. On dry alpine rocks. — G. Doniana Sm. Very abundant on rocks and stones. — G. ovata W. & M. Rhacomitrium patens Dicks. Wet granite rocks. — B. elUpticum L. — Var. denticulatiun Wills. — Pi. protensum Braun. On wet rocks. — B. sudeticum Bry. Brit. Wet alpine districts. — R. heterostichum Hedw. Frequent, rocks in subalpine districts. — Var. alopecurum Bry. Brit. {Grimynia affinis Lindb.). Very abundant on wet granite rocks. — Var. gracilescens Bry. Brit. {Grimmia obtusa Lindb.). Abundant on rocks on Aran. — R. fasciculare Schrad. Eocks in subalpine districts. — R. lanuginosum Hedw. Common on rocks, frequently in fruit. — R. canescens Hedw. Very common on sandy ground. — Var. ericoides Schrad. Near the margin of streams. PtycJiomitrium polyphyllum Dicks. Abundant. Amp)horidium Mougeottii Br. & Sch. Moist shady rocks, frequent. Zygodon viridissimus Dicks. On trees, rather rare. Ulota Bruchii Hornsch. On trees. — U. crispa Hedw. Very common. — Var. intermedia Schpr. Orthotrichum rupestre Schleich. On trees. — 0. affine Schrad. On trees, rather plentiful. — 0. stramineum Hornsch. — 0. tenellum Bruch. On poplar trees. — 0. diaphanum Schrad. On trees, rather frequent. — 0. Lyellii H. & T. On old trees, very abundant. — 0. leiocarpwn Br. & Sch. On trees, common. Splachnum sphcericum L. fil. Wet moorlands. FMtosthodon ericetorum Bals. Clay banks, frequent. — E. Temple- toni Hook. Wet rocks and banks, not common. Funaria hygrometrica L. Very common. Bartramia ithyphylla Brid. On banks and crevices of rocks, frequent. — B. ptomiformis L. Banks and clefts of rocks, very common. — B. Ralleriana Hedw. Damp rocks, common. Philonotis fontana L. About springs and streams, abundant. Breutelia arcuata Dicks. Wet rocks and banks, abundant; fruit rather rare. Webera polymorpha Hoppe. — W. elongata Dicks. — W. nutans Schreb. — W. cruda Schreb. Alpine rocks, rather rare. — W. albicans Wahl. Abundant in fields and on clay banks. Zieria julacea Schpr. Crevices of rocks on Bala limestone. Bryum inclinatum Swartz. — B. intermedium W. & M. Walls, not common. — B. bimum Schreb. Bogs, frequent. — B. murale Wils. Walls, not uncommon. — B. alpinum L. Very abundant on most alpine rocks. — B. ccBspiticium L. Walls and rocks, common. — B. argenteitm L. Walls, not common. — B. capillare L. Very
