POTTIOIDEAE. ORTHOTRICHUM. 689 
tescenti -viride breviter et parce dichotomum; folia cau- 
lina arcte appressa, madefacta erecto - patentia brevia, e 
basi breviter erecta ubique regulariter parenchymatice 
reticulatà parum recurva, oblongo - ligulata obtusata eva- 
nidinervia, margine erecto subinvolutaceo, apice dein ca- 
nescentia , superne grosse elliptico - areolata diaphana 
grosse papillosa; perich. majora latiora plicata; theca ter- 
minalis brevipedunculata immersa, e collo longo ovalis 
late S-striata, operculo acute cupulato; perist. ext. den- 
tes lanceolati 8 bigeminati rubelli apice saepe pertusi, int. 
cilia 8 breviora e cellul. serieb. 2 composita carinata ru- 
fescentia; calyptra ampla straminea, apice badia, plieata, 
basi sublacerata, ubique scabra. 
Br. Eur. 2 —3. p. 13. t. 1. —  Brid. I. p. 287. —  Weisia ob- 
tusifolia Roth. Tent. Fl. Germ. HI. L p. 218. — Orth. gyinnosto- 
mwm Blytt in sched. pr. Christianiam lectum. 
Patria. Ad trune. arborum campestrium per magnam 
partem Europae, sed raro fertile. — Aprili — Junium. 
Pl. masc. multo gracilior, floribus terminalibus, in- 
novando lateralibus sessilibus gemmaceis; fol. perigon. 
caulinis similia minora convolutacea, intima multo tene- 
rius reticulata fusca obsoletinervia; anth. longe stipitata 
majuscula, paraphys. filiformibus flavidis. Folia fila bre- 
via articulata saepe efficientia. 
2. ©. gymnostomum Bruch (Brid. I. p. 782.) ; dioi- 
cum; praecedenti simillimum, sed laxius pulvinatum, ro- 
bustius, folia caulina margine toto ambitu valde involuto, 
apice igitur. cochleariformi - concava , ubique fere e cellulis 
rhomboidaliter  angulatis  tenuissime | papillosis obscuris 
areolata, majora, latius ligulata; perich. acutiora; theca 
immersa oblonga gymnostoma substriata; calyptra nuda v. 
parce pilosa ubique scabriuscula basi sublacera. 
Br. Europ. 2— 3. p. 8. t. 1. 
Patria. Ad Populum. tremulum sylvae nicae pr. 
Bipontum: Bruch. — Martio et initio Aprilis. 
lufloresc. praecedentis, quocum notis illustratis nun- 
quam confundi potest, pulcherrima species, alibi forsan 
praetervisa. 
€; Müller: Synops. musc, frond, 44 
