Hypnace^.] 148 [Ctenidiuni. 



Amblystegium hispiduhim Kindb. Laubm. Schwed. and Norw. 48 (1883), 

 Hypnum stellulatum Kindb. Op. c. 41. 



Autoicous ; in dense bright green patches, stem procumbent, with 

 tufted radicles, irregularly subpinnate, branches slender, erect or 

 spreading, with subulate paraphyllia at base. Stem-leaves loose, patent 

 or reflexed, from a decurrent deltoid-cordate concave base, suddenly 

 acuminate in a long point, finely serrulate all round, nerves two, very 

 short or none; cells narrow, linear, at basal angles quadrate and 

 rectangular, green. Perich. bracts whitish, oblong, longly acuminate, 

 reflexed at point, sulcate, serrulate ; capsule small, oblong, more or less 

 incurved, castaneous, on a pale seta, lid convex-conic with a curved 

 apiculus, cilia of endostome with lateral appendages. 



Hab. — Stony ground and base of trees in N. America frequent, and also in 

 Norw'ay, Sweden, Lapland and Finland. 



Dr. Best has kindly sent me good American specimens, and I can find no 

 Specific difference between them and our British Somnwrfeltii. The leaves are 

 wider at base and their cells rather shorter and wider. 



Var. yS. Sommerfeltii {Myrin) Lindh. 



Leaves not so wide below, serrulate only above base, and with a longer 

 more subulate acumen, cells narrower and longer and at angles yellowish. 



SyNi — Hypnum sUllatum y, polymorphum Roehl. D. F1. iii, 103 (1813). Brid. Bry. univ. ii, 602. 

 Hypnum affine Sommerf. Suppl. FI. Lapp. 



Hypnum Sommerfeltii Myrin in Vet. Akad. Arsb. Holm. 1831, p. 328, et in Hartm. Handb. 

 - Sk. fl. 5 ed. 331 (1849). Bry. Eur. fasc. 57 — 61, p. 12, t. 2 (1854). Schimp. Synops. 600. 



HusNOT Muse. gall. 364, t. 104. De Not. Epilogo 173 (i86g). Dixon 456. Liufr. 



iii, 348. 



Hypnum stellatum Var. tenellum C. Muell. Synops. ii, 435. 



Hypnum polymorphum (non Hedw.) Bruch MS. WiLS. Bry. Brit. 367. Berk. 

 Handb. 100. 



Campylium hlspidulum R, Sommerfeltii Linob. Muse. Scand. 38. 

 Campylium Sommerfeltii Bryhn Exploi. 61 (1893). 



Hab. — Wsdls and rocks in limestone districts. Fr. 5 — 6. 



Near Bangor (Wilson 1826) ! Kirkham Abbey and Crambeck, near Castle Howard 

 (SpTuce)\ 1 Wall of Cum Hagg wood, Do. (Slater) ! ! Mackershaw wood, Ripon 

 (Brunton). Barrow Field and Haversham head, Westmoreland (Barnes 1868). Barbon 

 Fell (Stabler). Doward hills (Rev. A. Ley). Wolstonbury hill, Sussex (Mitten). 



16. CTENIDIUM {Schimp.) Mitt. 



Journ. Linn, Soc. xii, 21 (1869). 



Plants prostrate or erect, with or without radicles ; the branches and 

 ramuli pectinato-pinnate or subfasciculate ; leaves circinate-secund, 



