M U S C I. 105 



Tufts rough and bristly to the touch, of a bright, reddish-brown 

 color. Stems about three inches high, arising from a dense mat of 

 dark-purple radicles, simple. Leaves patent-divergent, rigid; the 

 lamina elliptical-lanceolate, about one line long, carinate-concave, the 

 margins doubly dentate, or rather bilamellar, each lamella strongly 

 dentate, the costa heavy, subterete, extending 4 or 5 lines beyond the 

 lamina into a stiff awn, dentate on its sides and back ; reticulation of 

 minute, dense, subquadrate cellules. Perichaetia arising from the 

 dense mat of rootlets at the base of the stem, shortly stipitate ; the 

 leaves of a thinner texture, and of a looser reticulation, the exterior, 

 broad-lanceolate, cuspidate, dentate ; the interior oblong, entire, fur- 

 nished with a long excurrent costa, as in the stem-leaves. Arche- 

 gonia numerous (40-60). Paraphysis linear, 7-10-jointed, somewhat 

 longer than the archegonia. 



Plate 26, A. — Rhizogonium pungens: plant, of the natural size. 

 Fig. 1. Portion of stem, with leaves. 2, 3, 4, 5. Leaves. 6, 7. Por- 

 tions of leaf, showing the reticulation. 8. Point of leaf. 9. Cross- 

 section of base of leaf. 10. Perichaetium. 11, 12, 13, 14, 15, 16. 

 Perichaetial leaves. 17. Fertile flower. 18. Archegonium and para- 

 physes. — Details enlarged. 



4. Rhizogonium bifarium, Hook. 



Rhizogonium bifarium, Scliimp. Bot. Zeit. 1844, p. 125. 

 Hypnum bifarium, Hook. Muse. Exot. t. 57. 



Hab. New Zealand. 



27 



