A Synopsis of the British Mosses / Containing Descriptions of All the Genera and Species, (With Localities of the Rarer Ones) Found in Great Britain and Ireland, Based Upon Wilson's "Bryologia Britannica," Schimper's "Synopsis," Etc.

by Charles C. P. Hobkirk

413. H. Notarisii. Schpr. (Pterogonium perpusillum, De Not.) St. creeping, irregularly branched; l. spreading squarrose opaque, imbricate and shining when dry, from an ovate base longly acuminate, nerveless, entire; per. l. internal with erose margins; caps. oval-oblong erect, slightly striate, and contracted at mouth when dry; lid conical erose. [Supp. Bry. Eur. fasc. III. IV.]

Trunks of elm and white thorn. Spring.

Windermere and Devon (J. Nowell); Killin, Perthshire (A. McKinlay), July, 1865; Ben Lawers (Hunt).

78. PTEROGONIUM. Swartz.

414. Pt. filiforme. Hedw. St. creeping, with incurved fasciculate branches; l. imbricate or secund, elliptical, concave, papillose at back, serrulate at pointed apex, margin recurved; nerved half way, or shortly two-nerved at base; caps. elliptical erect; lid conical, obliquely rostrate.

Mountainous rocks and tree trunks. S. I. Spring.

415. Pt. gracile. Sw. Rhizome creeping, with arcuate stems, and incurved fasciculate branches; l. spreading, (appressed when dry) ovate, concave, acute, serrate near apex, margin not recurved, slightly two-nerved at base; caps. oblong, longer and thicker than last; lid conical, shorter, not rostrate.

Shady sub-alpine rocks and walls, and trees. XI.

79. ISOTHECIUM. Brid.

416. I. myurum. Dill. St. 1–2in. from a creeping stoloniferous rhizome, with fasciculate branches; l. elliptical concave, not tapering but serrulate at apex, nerved half way, singly or forked; per. l. erect; caps. ovate, erect, with a long rostrate lid: dioicous.