72 



MEMOIRS OF THE NEW YORK BOTANICAL GARDEN 



(VOL. 11 



smaller. Underleaves smaller than the leaves, ovate to orbicular, 0.9-2.4 mm 

 long, 0.6-1.8 mm wide, bifid to one-fourth or one-half of their length, the seg- 

 ments erect, obtuse to acute, the sinus narrow, the margin entire, dentate to 

 ciliate-dcntate. Male and female inflorescences and sporophyte not seen. Fig. 



6, a-d. 



Habitat : ( )n soil. 



DOMINICAN REPUBLIC: s.l., Eggen (BM). 

 PUERTO RICO: s.l., Sintenia (BM;. 



GUADELIUPE: Grande Citerne, Duss 106, 227 (NY); Morne l'Echelle, Duss 216 (NY, 

 G) ; Mt. Pelee, Duss 91a, 125, 243 (NY) ; Soufriere, Duss 371 (as I. serrulata var. brasili- 

 ana) (NY); Husnot 227 (as I. serrulata var. brasiliana) (NY, G), Husnot (as /. serrulata) 

 (BM), Jung (BM), VHerminier (G) ; s.l., VHerminier (G, BM) ; s.l., Marie (BM) ; s.l., 

 without collector's name, ex Hb. Lehmann (isotypes BM, G). 



DOMINICA: Grand Soufriere, Elliott 810, 811 (as I. serrulata) (BM), Elliott 813 

 <as I. serrulata var. purpurea) (BM), Elliott 1829, 1830 (as I. madida) (BM), Elliott 830, 

 JL831a (BM). 



MARTINIQUE: s.l., Duss 92 (G). 



COLOMBIA: Antioquia, Bischler 16 (COL); Cauca: Paramo de Las Papas, Bischler 

 .'899, 904 p.p. (COL). 



ECUADOR: Azuay: Gualaquiza, Allioni 6540, type of I. ecuadoriensis (G); s.l., Allioni 

 .717 (G); s.l., Eraser 2 (BM). 



BOLIVIA: Unduavi, Rusby 3038 (as 7. serrulata) (NY); s.l., Herzog 4736 (as 7. 

 ■ ecuadoriensis) (G). 



In addition to the above there are reports in the literature from the French Antilles 

 (Bescherelle, 1893); Guadeloupe (Stephani, 1904); and Martinique (Pagan, 1942; Stehle, 

 1957). 



7. Isotachis auberti (Schwaegrichen) Stephani, Spec. Hep. 3: 688. 1909. 



Jungcrmattnia auberti Schwaegrichen, Hist. Muse. Hep. Prodr. 19. 1814. 

 Jungermannia serrulata W. J. Hooker, Muse. Exot. 1: pi. 88. 1818. Non J. serrulata 

 Swartz 1788. 



Isotachis gordoni Stephani, Hedwigia 34: 49. 1895. 



Plants very large, reddish-green, magenta, or dark red, ascending to erect, 

 in deep cushions; stems robust, to 10 cm long, with leaves to 4 mm wide, occa- 

 sionally branched near the base ; stems in transverse section to 14 cells across, 

 the cortical band of one or two layers, thick-walled, the cells of the medulla 

 larger, with thinner walls. Rhizoids not seen. Leaves spreading, asymmetric, 

 broadly ovate to subquadrate, 0.8-2.3 mm long, 0.7-2.0 mm wide, bifid to one- 

 fourth of their length ; segments short, triangular, acute to acuminate, the 

 sinus mostly U-shaped ; leaf margins including the segments with one to several 

 usually long teeth ; cells of the median portion of the lamina averaging 73 X 28 fi, 

 the walls with elongate intermediate thickenings, the trigones very small or ab- 

 sent, the cuticle minutely striolate-papillose. Underleaves smaller than the 

 leaves, orbicular to subquadrate, 0.7-1.9 mm long, 0.8-1.9 mm wide, bifid to one- 

 fifth of their length, the segments short, narrowly triangular, spreading, often 

 acuminate, the margins of the underleaf long-ciliate-dentate. Female inflor- 

 escence terminal, the bracts and bracteoles in several series, larger than the 

 leaves and underleaves, the bracts ovate-truncate, the bracteoles oblong, ciliate- 

 dentate. Perigynium 5-6 mm long, arcuate. Elaters 350^400 p. long, reddish- 

 brown; spores pale reddish-brown, smooth. Male inflorescence not seen. Fig. 

 7, a-d. 



Habitat: On soil. 



