IOONKS MUSCUIUIjM. 



55 



ORTHOTRICIIUM EXIGUUM, Suttiv. 



Tab. 35. 



PlanT/E perpusillae, pulvinulos laxos saturate virides efTor- 

 mantes. 



Caulis 2-3 lineas altus, simplex vel fastigiato-ramosus, laxius 

 foliosus. 



Folta elongato-oblonga, obtuse acuminata, erecto-patentia, 

 margine leniter recurva, ad apicem fere carinato-costata, superne 

 punctiformi-areolata, minutissime papillosa, basi e cellulis ob- 

 longis laxius texta. 



Flores dioici : masculi gemmiformes, in plantis femineis mi- 

 noribus terminales ; perigonialibus orbiculari-ovatis ; paraphysi- 

 bus subnullis. 



Capsula subimmersa, oblongo-ovalis, brevicolla, macrostoma, 

 sicca lenissime lato-costata ; tube- vaginali conspicuo ; peristomio 

 duplici, dentibus 16 geminatis, ciliis 8 lanceolatis dentes latitu- 

 dine superantibus obtusis albidis punctulatis e cellularum duplici 

 serie exstructis; operculo hemisphaerico apiculato ; calyptranuda 

 vel pilis rarissimis adspersa. 



Orthotrichum exiguum, Sulliv. Mosses U. States, p. 33. 



Hab. On the base of trees, near the Santee Canal, South Car- 

 olina, Ravenel. 



One of the smallest of the genus, approaching closely in many 

 of its characters O. obtusifolium, Schrad. ; which, however, is a 

 much larger species, with a longer-necked capsule, strongly ribbed 

 when dry ; the leaves subelliptical, more obtuse, plane on their 

 margins; the teeth of the peristome 8 bigeminate ; and the cilia 

 much narrower and yellowish. 



