20 SPHAGNACE^. [Sphagnum. 



larger stem-leaves narrowed at base and eraarginate at the apex, 



the shorter imbricate and appressed (not secund) branch-leaves, 



the utricles elongated and flexuous, with fewer small pores on 



both sides of the walls, and the narrowly oval ducts free on 



both faces. — Sulliv. Icon. Muse. Supj^l. 17, t. 8 ; Braithw. 



Sphag. 44, t. 7, 8 ; Lindb. Sphag. 25. jS. contortum, var. lari- 



cinum, Wils. 



II AB. Marshes and bogs; Sand Lake, N. Y. (C. H. Peck); Gloucester 

 County, Penn. (E. A. Ran). 



17. S. Mendocinum, Sulliv. & Lesq. Elongated, floating, 

 loosely cespitose, tawny above, yellowish white below ; stems 

 solid, the cortical cells in a simple or double layer ; branches 

 long and flexuous, in fascicles of 2 or 3, mostly oj^en, not pen- 

 dent : stem-leaves oblong-ovate, auricled at base, marginate, 

 fibrillose and porose in the upper part ; branch-leaves loosely 

 imbricate, lanceolate, acuminate, subulate-dentate at the apex, 

 the loner flexuous utricles with close fibrils and numerous minute 

 pores in rows on both sides of the walls ; ducts medial and 

 compressed, or narrowly triangular with the free base on the 

 convex surface : fruit unknown. — Sulliv. Icon. Muse. Suppl. 

 12, t. 3. S. auriculatam, Lesq. in Mem. Calif. Acad. i. 4; 

 Sulliv. & Lesq. Muse. Bor.-Am. Exsicc. (2 ed.) n. 23. S. suh- 



sectmdum^ var. longifoUum.^ Lesq. 1. c. 



Hab. Swamps near Mendocino City, California (Bolander, 1867); 

 bogs near King River, California, at 8-9,000 feet altitude {Brewer). 



The species is allied to S. cuspidatum (to which it is referred by 

 Braithwaite and Lindberg) in its habit and in the disposition of the 

 ducts, to S. subsecundum in the structure of the leaves. 



18. S. tenellum, Ehrh. Dioecious, soft and delicate, rarely 

 cespitose, mostly floating, yellowish green or straw-color ; stems 

 loose, slender, very long and flexuous, the cortical cells distant 

 in a double layer ; branches short, solitary or 2 or 3 together, 

 spreading or one of them reflexed : stem-leaves spreading or 

 erect, large, oblong-ovate, obtuse, entire, densely fibrillose, with 

 a few pores in the upper part ; branch-leaves loosely incumbent, 

 comparatively short, ovate-lanceolate, distinctly margined, erose 

 at the apex, strongly fibrillose, with many small pores on the 

 upper surface ; perichoetial leaves loosely imbricate, oblong- 

 lanceolate or Ungulate, fibrillose in the upper part : capsule 

 small, thin-walled, ochraceous : spores large, yellow : male 

 plants in sej^arate tufts ; aments small, orange-color. — Braithw. 



