1962] 



LEAFY HEPATICAE OF LATIN AMERICA — PART I 



71 



long to orbicular, often reflexed above, bifid to one-third of their length, the 

 sinus U-shaped, the margins with one to several coarse teeth above, usually on 

 the outer margins of the segments, the cells as in the leaf. Plants dioieous. 

 Male inflorescence terminal but becoming intercalary in position, the bracts and 

 bracteoles in 10-15 series, similar to the leaves and underleaves, slightly larger, 

 the bracts concave, the bracteoles plane; antherida large, globose, in pairs in 

 the axils of the bracts. Female inflorescence terminal on the stem, the bracts 

 and bracteoles similar to the leaves and underleaves, larger, obovate, the sinus 

 broad, shallow, rounded, the outer margins toothed in the upper half. Perigy- 

 nium conic-cylindric, to 6 mm long, straight to arcuate, long-ciliate at the top. 

 Sporophyte not seen. Fig. 5, a-e. 



Habitat : On soil. 



JAMAICA: S.I., Swartz (isotypes SPA, BM); s.l., Schweinitz, (as I. swartziana) 

 (PHIL) ; near Cinchona, Harris, 11024 (as I. guadeloupensis) (G, NY) ; s.l., Wilds 7 (NY) ; 

 s.l., Hansen, isotype of 7. urbani (FH) ; s.l., Weber 25 (S PA). 



GUADELOUPE: Soufriere, Duss ISO (as I. guadeloupensis) (NY, G), Le Gallo 226 

 (Hb. Le Gallo) ; s.l., Duss 1209 (as I. guadeloupensis) (G) ; foret de Baines Jaunes, Le 

 Gallo 225 p.p., 2S2 p.p. (Hb. Le Gallo) ; s.l., I'Herminicr (as I. serrulata var. procera (FH) ; 

 8.1., Husnot 230, isotype of I. husnoti (FH). 



MARTINIQUE: Mt. Pelee, Duss 294, (as I. mascula) (NY), Duss, (as I. quadeloupen- 

 sis) (G), Duss 370 (as /. serrulata var. swartziana) (NY); s.l., Duss 605 (as I. hahnii) (G, 

 FH) ; s.l., Husnot 228, type of J. swartziana (type G, isotypes FH, NY) ; s.l., Husnot 278 

 (as I. serrulata var. swartziana) (S-PA) ; Bois de Colson, Duss 1209 (as /. mascula) (NY) ; 

 s.l., Duss 605 (as I. multiceps) (NY) ; s.l., Hahn 1445, type of I. hahnii (type G, isotype BM). 



GUATEMALA: Alta Verapaz, Turckheim (as I. mascula) (NY, BM). 



COLOMBIA: Bogota, Weir (NY); Territoria del Caqueta, Woronow 96, type of I. 

 woronowii (Hb. Herzog), Woronow 113, type of I. pilifiora (Hb. Herzog) ; Comisaria del 

 Caqueta, Cuatrecasas 8788c (US) ; Antioquia, Bischler 67 (?) (COL) ; Cundinamarco, 

 Bischler 93 (COL); Cauca: Paramo de Las Papas, Bischler 739, 789, 793 (COL); Huila- 

 Cauea: Paramo de Las Papas, Bischler 786, 843 (COL). 



BOLIVIA: Sillar, Herzog, type of I. paucidens (type G, isotype Hb. Herzog); Un- 

 duavi, Busby 3038 (BM) ; Yungas, Busby 3037 (NY). 



The species has also been reported in the literature from the following areas: Jamaica 

 (Boswell, 1887; Swartz, 1806), Antilles of France (Bescherelle, 1893); Guadeloupe (Gottsehe, 

 1875; Pagan, 1942; Stephani, 1904); Dominica (Spruce, 1895); Martinique (Arnell, 1959; 

 Stephani (1904); Brazil (W. J. Hooker & Wilson, 1844; Massalongo, 1911; Spruce, 1888; 

 Stephani, 1893b); and Bolivia (Spruce, 1890). 



6. Isotachis haematodes (Lehman & Lindenberg) Gottsehe, Ann. Sci. Nat. V. 

 1: 122. 1864. 



Jungermannia haematodes Lehmann & Lindenberg, in Lehmann, Pug. PI. 4: 42. 1832. 

 Isotachis ecuadoriensis Stephani, Spec. Hep. 6: 351. 1924. 



Plants large, reddish-green to dark red or reddish-brown, erect or ascend- 

 ing, in tufts or deep cushions ; stems stout, 4—12 cm long, with leaves 2-4 mm 

 wide, irregularly branched; stems in transverse section 16-18 cells across, the 

 cortical cells in one or two layers, small, the walls very thick, the cells of the 

 medulla large, with thinner walls. Rhizoids not seen. Leaves imbricate, tending 

 to be concave, asymmetric, ovate, 1.3-3.0 mm long, 0.9-2.6 mm wide, bifid to one- 

 third or one-half of their length; segments typically narrowly triangular, blunt, 

 the sinus narrow, V-shaped; leaf margins including the sinus more or less 

 dentate to ciliate-dentate ; cells of the median portion of the leaf 40-82 X 24- 

 36 p., the walls with intermediate thickenings tending to coalesce with the tri- 

 gones, the cuticle striolate-papillose ; cells of the segments and the leaf margins 



