1968] 



LEAFY HEPATICAE OF LATIN AMERICA PART III 



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verrucosa. Amphigastria squamata. Bracteae bracteolaeque feminae patentes, serie- 

 bus intimis bifidis ad medium, segmentis longis, anguste triangularibus. Perianthii 

 os longe ciliatum, cilia cellularum quadratarum. 



Plants slender, fragile, whitish-green, in dense mats on tree trunks; stems 1-2.5 

 cm long, with leaves 0.8-1.0 mm wide, prostrate; branches occasional, ventral-inter- 

 calary, leafy or small-leaved, or short sexual; stem in transverse section 5-8 cells 

 across, the cortical layer of about 12 rows, scarcely smaller than the cells of the 

 medulla, the walls thickened, with pits. Rhizoids hyaline, long, from the ventral 

 side of the stem or from all around the stolons. Line of leaf insertion oblique. Leaves 

 widely spreading, rectangular, 0.4-0.6 mm long, 0.3 mm wide, plane, the margins 

 straight or irregular, the cells quadrate to rectangular in outline, of the apical 

 margin 15-20 of the upper part of the leaf 20-26 X 20-24 n, the walls uniformly 

 thickened, the small trigones with concave sides, the cuticle rough-warty. Under- 

 leaves scale-like, few-celled. Plants dioicous. Female inflorescence on a short ventral 

 sexual branch, the bracts and bracteoles in 3 or 4 series, spreading, narrowly sub- 

 rectangular, the outer series oblong, slit by a few cells above, the intermediate series 

 bifid to one-third, the segments broad, triangular, the innermost series bifid to more 

 than one-half, the segments long, slender. Perianth mouth [immature] long-ciliate, 

 the cells quadrate in outline. Male inflorescence and perianth not seen. 



PI. 87. Fig. 4, a-i. 



Habitat: In dense light green mats on tree trunks. 



COLOMBIA: Amazonas-Vaupes: Rio Apaporis, Soratama, 250 m, Schultes & Cabrera 12883 

 (type FH). 



5. Odontoschisma variabile (Lindenberg & Gottsche) Stephani, Spec. Hep. 3: 

 372. 1908. 



Sphagnoecetis variabilis Lindenberg & Gottsche in G. L. & N. Syn. Hep. 688. 1847. 



Plants of small to medium size, yellow-green to yellow-brown, sometimes becom- 

 ing reddish, in mats or among other bryophytes; stems to 2 cm long, with leaves to 

 1.5 mm wide, sometimes becoming flagelliform at the tip, or erect, small-leaved 

 and gemmiparous; branches frequent, ventral-intercalary, leafy, flagelliform (stolon- 

 like) or short sexual. Rhizoids colorless, short, on the ventral side of the stem. 

 Line of leaf insertion oblique. Leaves approximate to imbricate, spreading but 

 slightly ascendant, oblong to broadly ovate with a rounded apex, plane to concave, 

 bordered by one to several rows of thicker-walled cells, the margin curved upward; 

 cells of the border at the tip, 20-24 n, the walls thickened, cells of the upper part 

 of the leaf mostly 24-30 X 24-30 fi, the walls thin, the trigones small with concave 

 sides, or knot-like, the cuticle verruculose. Underleaves small, scale-like, few-celled. 

 Plants dioicous. Female inflorescence on a short ventral branch, the bracts and 

 bracteoles in 3 or 4 series, bifid to one-fourth, hyaline, the cells large. Perianth 

 long, cylindrical below, 3-keeled becoming plicate above, the mouth ciliate. Male 

 inflorescence not seen. 



PI. 88. Fig. 5, a-f. 



Habitat: On logs. 



MEXICO: Chiapas: Montebello, 5500 ft, Sharp 3589 (TENN) ; Oaxaca: Distr. Chinantla, 

 S. Pedro Tepinapa, 2000-2300 ft, Liebmann, PI. Mex. 315a (type C) ; si, Liebmann (BM). 



GUATEMALA: Baja Verapaz: Civija, 4100 ft, Sharp 5177, 5184, 5185 p.p. (TENN); Alta 

 Verapaz: Cerro Chinaja, Steyermark 45634 (F). 



HONDURAS: Morazan: Cerro de Uyuca, 1500 m, Standley 683 p.p., 734 p.p. (F) ; the 

 same, 1620-1800 m, Standley, Williams & Molina R 8023 p.p. (F). 



