M U S C I. 



Tribe 2. ANCECTANGHLaJ. 



1. ANCECTANGIUM, Schwcegr. 



1. Ancectangium Peruvianum, Sp. Nov. (Tab. 1.) 



A.dioicum; parce radiculosum ; ramis paucis elongatis subclavatis ; 

 foliis rigidis e basiovali lineali-lanceolatis obtusiusculis valido-costatis ; 

 capsula ovali late annulata, pedicello sicco quadrangulari ; antheridiis 

 copiose par aphy satis. 



Hab. High Andes of Peru. 



Grows in compact but easily separable tufts of a dusky yellow. 

 Stems erect, with few radicles, one and a half inches high, sparingly 

 divided: branches few, elongated, slightly clavate. Leaves rigid, 

 crowded, from an erect oblong-ovate clasping base, linear-lanceolate, 

 spreading, canaliculate, of a firm thick texture composed of minute 

 subquadrate cellules : costa heavy, extending to the rather obtuse 

 point. Capsule oval, wide-mouthed after the fall of the acicular- 

 rostrate operculum: annulus broad, compound, persistent: pedicel 

 tender ; when dry, quadrangular in section. Dioicous : the male plant 

 intermixed with the fertile : male buds in fascicles on short branches : 

 paraphyses numerous, linear, as long as the antheridia. 



Approaches A compactum, but is a more robust plant with stems 

 less branched and far less radiculose. It has leaves of a different 

 shape and texture, a broad annulus, a quadrangular pedicel, and 

 numerous paraphyses in the male bud. 



Plate 1, A. — Ancectangium Peruvian™ : one male and three fer- 

 tile plants, of the natural size. Fig. 1. A plant. 2, 3, 4, 5, 6. Stem 

 leaves. 7. Portion of base of leaf showing the reticulation. 8. 

 Upper portion of leaf showing the same. 9, 10. Cross sections of 

 leaf. 11. Perichsetium, pedicel, and capsule. 12, 13. Perichsetial 

 leaves. 14. Cross section of point of a perichastial leaf. 15, 16. 

 Capsules. 17. Operculum. 18. Portion of mouth of capsule. 19. 

 Top of male plant. 20. Male bud. 21, 22, 23, 24. Perigonial leaves. 

 25. Antheridium with a paraphysis. — The details magnified. 



