46 CRYPTOGAMIA. 



ff Folia plus minus marginata. 



8. Hypnum marginatum, Book. fil. & Wils. 



Hypnum marginatum, Hook. fil. & Wils. Lond. Jour. Bot. 3, p. 554 j Flo. N. Zeal, 

 p. 106, t. 89, f. 2. 



Hab. Bay of Islands, New Zealand. 



9. Hypnum tricostatum, Sulliv, (Tab. 9.) 



H. dioicum, rnajusculum, dendroideo-ramosum ; minis elongatis flexuosis 

 simplicibus compositisve ; foliis confertis erecto-patentibiis ovato-ohlongis 

 acutis continuo-costatis incrassate limbatis (veluti tricostatisj superne 

 grosse serratis subpunctiformi-areolatis ; perichcetiis polypliyllis rami- 

 genis. 



Nechera tricostata, Sulliv. in Proceed. Araer. Acad. Art. Sci. (Jan. 1854.) 

 Hab. Hawaii, Sandwich Islands. 



A striking, showy, dendroid species, with brownish-yellow foliage. 

 Main stem creeping horizontal, throwing up at intervals erect branches, 

 5 to 7 inches high, which below are simple, blackish, shining, and leaf- 

 less ; above, divided into numerous crowded, elongated, flexuose, sim- 

 ple, and compound branchlets. Leaves imbricating, erect-patent, 

 slightly incurved, ovate-oblong, acuminate, with a broad subtruncate 

 base, serrate above, concave, carinate, costate their entire length ; the 

 margins surrounded by a thickened border, similar to the costa ; com- 

 pactly areolated, the cellules minute, subrotund. Perichgetia situated 

 at the base of the branchlets, oblong; the leaves numerous, closely 

 imbricating ; the lower ones broad-ovate, more or less apiculate ; the 

 upper, oblong, convolute, with horizontally reflexed acuminate points ; 

 all ecostate, their margins with a more or less distinct pellucid border. 

 Archegonia numerous, 45-50. Paraphyses copious, longer than the 

 archegonia, formed of about 30 oblong cellules, placed end to end, the 

 base in some composed of several strata of cellules. Probably dioicous. 



