EUROPE AND NORTH AMERICA. 



33 



ii 



internally on the wall where united to the chlorophyllose cells, all 

 fibrillose, with several large pores at the margin ; chlorophyllose 

 cells triangular in section, interposed between the hyaline on the 

 concave surface of the leaf. Fruit unknown. 



Hab. — Swamps in mountain districts. N. America: Manchester ponds, Ocean 

 County, New Jersey (Austin). First found by Schwanecke in Porto Rico. 



This fine and rare species worthily heads the genus, and with 

 the two following and Sph. Herminieri, Schimp., from Guadaloupe, 

 constitute a small natural group having the internal lateral wall of 

 the hyaline cells variously covered with crests or papillae. The 

 present may be at once distinguished by the beautifully fringed 

 margin of the branch leaves, and by the curious downward pro- 

 longation of the transverse wall of the cuticular cells of the 

 branches, which may be readily observed in the series of cells at 

 each lateral margin. 



2. Sphagnum Austini, Sullivant. 



Pl. III. 



Dioicous, green above, ochraceous or brown below, the stem 

 with four layers of cuticular cells. Stem leaves Ungulate, obtuse. 

 Divergent branches two, attenuated, the cuticular cells spirally 

 fibrillose. Branch leaves closely imbricated, ovate-oblong, some- 

 what cucullate, squamose at back ; chlorophylk .ie cells obtusely 

 trigonous, placed between the hyaline on inner surface of leaf, and 

 transversely crested with papillae where united to them. 



Synon. — Sph. Austini, Sull. in Aust. Musci Appal, p. 3, n. 2 (1870), et Ic. 

 Muse. Suppl. t. I, p. 9 (1875). LiNDB. in Act. Soc. Sc. Fenn. x. p. 280, in addend. 

 (1872), in Bot. Not. 1873, p. 45, et in Not. ur Sallsk. pro Fn. et Fl. Fenn. Forh. 

 xiii. p. 391 (1874). Braithw. in Monthl. Micr. Joum. May 1873, p. 215, t. 17, et 

 Sphag. Brit. Exsic. n. i (1877). Cooke, Grevillea, ii. p. 61 (1873). Schimp. 

 Synops. ed. 2, p. 849 (1876). 



Dioicous, in elevated densely-cushioned tufts ; soft, robust, pale 

 green above, fusco-ochraceous below. Stems 4-8 in. high, fre- 

 quently dichotomous, dark brown ; cells of the peripheral layers 

 strongly incrassate, red brown ; cuticular cells in four strata, the 

 outer quadrato-hexagonal, without fibres, the inner with very fine 

 fibres and large pores. Stem leaves erect. Ungulate, obtuse, 

 minutely fringed at apex ; the hyaline cells empty above, fibrose 

 and porose below. Branches closely placed, three in a fascicle, 

 two divergent, arcuate, attenuated towards point, one pendent, 



