104 



MEMOIRS OF THE NEW YORK BOTANICAL GARDEN 



[VOL. 11 



9. Herberta bivittata Spruce, Trans. Proc. Bot. Soc. Edinb. 15: 343. 1885. 

 Schisma bivittatum (Spruce) Stephani, Spec. Hep. 4: 11. 1909. 



Plants of medium size, julaeeous, greenish-brown tinged with red, in tufts ; 

 leafy stems coarse, 5 cm or more long, with leaves to 2 mm wide (when dry), 

 occasionally branched, the branches leafy. Line of leaf insertion transverse. 

 Leaves erect-spreading, imbricate, symmetric, concave, broadly ovate, subquad- 

 rate, 2.5-3 mm long, 2 mm wide, bifid to one-third or one-half of their length ; 

 segments short, broadly triangular-acute to short-acuminate, the margins entire 

 or with an occasional coarse tooth, the vitta one-eighth the width of the base of 

 the segment, ending well below the apex; lamina broad, the margins strongly 

 convex from a narrow base, entire, or with an occasional appendage near the 

 base, the vitta bifurcate from the base. Underleaves like the leaves. Plants 

 dioicous. Female inflorescence terminal on the stem, the bracts and bracteoles 

 in four to six series, like the leaves but with more marginal teeth, the innermost 

 series largest, the segments and margins incised with coarse teeth, the base with 

 many cilia and appendages. Perianth (immature) 3-parted to one-half of its 

 length, the divisions bilobed, the segments incised. Male inflorescence and sporo- 

 phyte not seen. Fig. 9, a-f. 



Habitat : On trees in forests. 



PERU: Campana, 1200 m, Spruce, Hep. Sprue., type (isotypes NY, G). 

 The species is also reported in the literature from Costa Rica (Herzog, 1938a, = H. 

 limbata). 



10. Herberta subdentata (Stephani) Fulford, comb, now 



Schisma subdentatum Stephani, Trans. Linn. Soc. Bot. II. 6: 99. 1901. 

 Schisma striolatum Stephani, Spec. Hep. 4: 13. 1909. 

 Schisma lcarstenii Stephani Spec. Hep. 4: 14. 1909. 



Herberta durandii var. dissecta Herzog, Revue Bryol. Liehenol. 11 : 25. 1938. 



Plants of small to medium size, yellowish to reddish-brown or black, in tufts ; 

 leafy stems 3 to 10 em long, with leaves 1 mm wide, irregularly branched, some- 

 times pinnate ; the branches lateral, leafy, of the Frullania type with the lance- 

 olate half-leaf dorsal, or ventral and usually flagelliform. Rhizoids from the scale- 

 like leaves of the flagelliform branches. Leaves imbricate, erect-spreading, tend- 

 ing to be falcate, subrectangular, 2-3 mm long, 1.0-1.5 mm wide, bifid to one- 

 half of their length; segments triangular from a broad base, tapering to the 

 acuminate apex of three to eight cells, the margins entire, the vitta one-fourth 

 or less of the width of the base of the segment, ending below the apex, the sinus 

 V-shaped, broad; lamina broadly ovate, the margins convex, with a few coarse 

 appendages, the vitta bifurcate just above the base ; leaf -cells with very large 

 trigones and thickenings and thin-walled pits, the cuticle roughened. Under- 

 leaves slightly smaller, not so wide as the leaves, the segments usually erect 

 spreading. Male and female inflorescences and sporophyte not seen. Fig. 10 a-d. 



Habitat : On trees and rocks. 

 MEXICO: Orizaba, Karsten, type of S. lcarstenii (G). 



COSTA RICA: Heredia: Cerros de Zurqui, 2000-2400 m, Standley # Valeric- 50338, 

 type of H. durandii var. dissecta (Hb. Herzog) ; Volcan Barba, 3000 m, Yalerio 1, 5 (Hb. 

 Herzog). 



COLOMBIA: Antigua: Paramo de Sonson, 10,000 ft, G. Wallis, type. of S. striolatum (G). 

 BRITISH GUIANA: Mt. Roraima, Quelch (type G). 

 BRAZIL: "Roraima," Vie 650 (G). 



