- 27 - 



Leaves ovate acute not recurved, erect when dry; upper cells 

 rhombic, lower oval-oblong, lowest basal subquadrate; costa va- 

 nishing below middle. Capsule small oval-oblong; teeth reddish; 

 segments lower, orange, with longitudinal line and basal mem- 

 brane; lid conic; pedicel short. Tufts dirty green. Branches 

 distant not curved. Monoecious. Habit of Leskea polycarpa 

 but with smaller leaves. — On base of trees, r. on rocks, prin<'. 

 near rivers, r. Eur. Sweden 1853! Norway! Amer, Can.: Macoun. 

 2.M.Dieckii Renauld et Cardot. 



Leaves gen. obtuse, sometimes recurved below, appressed 

 when dry; cells rhomboidal or oval-oblong except the quadrate 

 not well-defined alar; costa subpercurrent or somewhat shorter. 

 Stem leaves ovate-oblong subacute; branch-leaves broad-ovate or 

 Buboval, sometimes indistinctly apiculate. Capsule (not ripe) 

 subcylindric; lid not apiculate; pedicel short smooth. Branches 

 distant not curved. Peristome and male flowers unknown. — 

 Trees r. Amer. Pacif. distr. U. S.: Roell, com. Cardot. 



29. Helicodontium Schwsegrichen. 

 I.H.SUbcapillatuni Hedwig. — Pterygynandrum H.; Helico- 

 dontium Kindb.; Homalothecium Schimp.; Sull. ic. m. 



Leaves serrulate all around or above middle, not striate, re- 

 curved to acumen, very small and not appressed; alar cells 

 hyaline, the others rhomboidal oblong or the inner basal subii- 

 near; costa gen. simple vanishing near or above middle, some- 

 times shorter and double. Stem-leaves ovate abruptly narrowed 

 to a long filiform or subulate point, decurrent; branch-leaves 

 ovate-oblong gen. long-subulate. Perichetial leaves narro^v long- 

 acuminate. Capsule suboblong very small; teeth red, bordered 

 at base (»sometimes also above»: Sull. 1. c.) by the rudimen- 

 tary endostome; lid rostellate; pedicel faintly rough, very short; 

 calyptra sometimes beset with long hairs. Spores large. Bran- 

 ches erect subdistant not or faintly curved. Dioecious. — On 

 bark r. Amer. U. S.: SuUivant, com. C. Mueller; Wolf, com. 

 Macoun. 



Fam. 10. EntodontacesB. 



30. Holmgreuia Lindberg (Orthothecium Schimper). 



A. Tufts loose sparingly radiculose. Leaves more or less 

 striate, reddish at insertion. Endostome not longer than teeth. 



a. Leaves us. large and distinctly striate or plicate, recur- 

 ved. Branches mostly long. 



l.H.chrysea Schwsegrichen. — Hypnum Schw.; Holmgrenia 

 Lindb. 1862; Brachythecium lapponicum (Lindb.) Schimper. 



