ICONBS MU8CORUM. 1 53 



1IYPNUM PYGMiEUM, Schimp. 



Tab. 98. 



Plant.e minutulas, dcprcsso- et implexo-ca3spitantes, colore 

 viridi in luteo-variegatum vcrgcntc. 



Caulis uncialis et ultra, parce divisus, valde papillosus, 

 breviter bipinnato-ramulosus ; ramis ramulisque tenuissimis. 



Folia hcteromorpha, caulina niulto majora, distantia, late 

 deltoidea, subdecurrentia, longius capillari-acuminata, paten- 

 tissima, ramorum et ramulorum ovato-lanceolata vel elongato- 

 ovata, acutata, erecto-patentia, laxe incumbentia, crassiuscula, 

 opaca, utraque pagina dense papillosa, margine toto papilloso- 

 crenulata ; costa valida pellucida infra apicem desinente; rete 

 uniformi e cellulis minutissimis liexagono-rotundis granuloso- 

 chlorophyllosis exstructo ; paraphylliis subnullis : perichsetialia 

 subla3via, laxius longiusque areolata, interiora vaginantia, elon- 

 gato-lanceolata, tenuiter acuminata, costata, superne leniter 

 serrulata. 



Flores monoici, cauligeni : masculi gemmacei ; perigonialibus 

 ecostatis. 



Capsula altius pedicellata, brevi-oblonga, arcuata, ina3qui- 

 lateralis, macrostoma ; peristomio hypnoideo, dentibus apice 

 flexuoso-filescentibus, ciliolis ternatis brevibus ; annulo perfecto 

 conspicuo ; opercnlo e basi conica subulirostro ; calyptra ma- 

 juscula. 



Thuidium pygm.eum, Schimp. Bryol. Europ. 



Hypnum pygm.eum (Schimp.), Sulliv. Mosses U. States, p. 67; Sulliv. & 

 Lesqx. Muse. Bor.-Amer. Exsicc. (ed. 1), No. 275. 



Hab. Grows in thin close mats, on limestone rocks, in shaded 

 ravines, Central Ohio. Rare. 



Very near H. minutulum: distinguished however by its smaller 



