— 79 — 



middle cells suboblong. Branch-leaves diBtant narrower. Capsule 

 subsymmetrio or faintly curved; lid not apiculate. Tufts green. 

 — Earth and trees r. Eur. Switzerl. near Lugano and in Grau- 

 buendenl 



II. Ptycholoma Kindb. 

 16.A.adnatiini Hedwig. — Hypnum H.; Sulliv. icon, m.; Am- 

 blystegium Kindb. 



Leaves entire gen. subovate obtusate; alar cells subquadrate 

 on a narrow space, the others chlorophyllose gen. suboval. Cap- 

 sule often arcuate; teeth yellowish; cilia often long; lid apicu- 

 late or obtuse. Perichetial leaves serrulate at the short acumen. 

 Tufts green or dark green. — Stones and trees. Amer. not r. 

 Can.: Macoun; Moser. U. S.: Sullivant, com. C. Mueller. 



54. Platyloma Kindberg, new genus*). 

 l.P.Lescnrii Sullivant. — ■ Hypnum Sull. icon. m. 



Leaves distant chlorophyllose opake, minutely denticulate all 

 around, not decurrent; costa thick subpercurrent. Stem-leaves 

 broadly round-ovate, abruptly short-acuminate; inner cells lan- 

 ceolate-linear, alar obsolete. Branch-leaves ovate subobtuse or 

 acute; cells oval-oblong. Perichetial leaves ovate-lanceolate; costa 

 excurrent. Capsule suboblong or arcuate; teeth golden yellow, 

 connate at base; segments as high, split in middle; cilia long 

 not appendiculate; annulus large compound; lid obtuse mamil- 

 late; pedicel 2 — 3 centim. long. Stem irregularly branching. 

 Tufts dark green. Monoecious. — Moist rocks r. Amer. U. S.: 

 Roell; Lesquereux, com. Renauld. 



55. Calliergon Kindberg, new genus. 



(Hypnum, subsp. Calhergon et Limnobium, Sullivant.) 



A. Capsule not annulate. Leaves entire. 



I. Eu-Calliergoii. Leaves not falcate; alar cells large; costa long 

 gen. subpercurrent. Pedicel of capsule long. Stem not cree- 

 ping but sometimes radiculose below, often pinnate. Dioecious 

 or (C cordifolium) monoecious. 



II Limnobion. Leaves of stem not falcate, those of branches 

 often falcate; alar cells not large; costa abbreviate sometimes 

 double or indistinct. Pedicel of capsule shortish. Stem cree- 

 ping not pinnate. Monoecious. 



B. Capsule annulate. Leaves sometimes denticulate. 



a. Stem pinnate eradiculose. Leaves entire; costa double 

 very short or indistinct. Dioecious. 



•) This peculiar genus is nearly similar to Limhella 0. M. in sched., 

 found in S. Amer. only in barren state, 



