1962] 



LEAFY H EPATICAE OF LATIN AM ERICA — PART I 



25 



Plants of medium, size, tending to be radially symmetric, deep reddish-brown 

 to black, in erect tufts or amon<; other bryophytes; stems slender, 3-6 cm high, 

 with leaves to 2 mm wide, sparingly branched, the lateral branches of the 

 Frull<mia type, more rarely of the Microlcpidozia type, or occasionally inter- 

 calary in the axils of the leaves, the ventral branches rare, axillary-intercalary; 

 stem in transverse section with a nnistratose cortex of mostly smaller cells than 

 those of the medulla. Rhizoids occasional, brown, from the base of an underleaf. 

 Line of leaf insertion transverse. Leaves distant to approximate, patent-diver- 

 gent, bisbifid to three-fifths of their length ; segments lanceolate, the base mostly 

 six to eight cells broad, the tip ending in a row of two or three cells little longer 

 than broad ; lamina cuneate, the area just below each sinus often thickened with 

 a few additional bulging, variously oriented superficial cells ; leaf-cells at the 

 base of the segment 18-36X18-24 /x, the walls thin, the cuticle faintly roughened. 

 Male inflorescence terminal but becoming intercalary through growth of the 

 stem, the bracts and bracteoles in three to ten series, the bracts concave, with 

 segments shorter than those of the leaves, the bracteoles plane, scarcely smaller 

 than the underleaves. Female inflorescence and sporophyte not seen. Fig. 2, a-h. 



Habitat : Along streams, on wet glacial detritus and in wet alpine meadows. 



PATAGONIA— TIERRA DEL FUEGO ; Puerto Bueno, Dusen. [no. 33] coll. 25. 1. 1896, 

 (as L. guadrilaciniata (NY) ; same locality, Dusrn, ex Upsala Bot Mus. (G) ; 



SOUTH GEORGIA: Cumberland Bay, Skottxberg 156, coll. 18. 4. 1909, (type S-PA), 

 Skottsberg 157 (as L. quadrilaciniata) (S-PA); Georgia antarctica: without locality, Skotts- 

 berg, coll. 1909, "portion of the original" (type G). 



herzogiariaceae Fulford, Nova Hedwigia 1: 399. 1960. 



Plants erect, more or less radially symmetric, deep brown to black, irregu- 

 larly branched, the branches intercalary, axillary above half a leaf or underleaf; 

 stem in transverse section with the single layer of cortical cells only slightly 

 smaller than those of the medulla, all the cells very thick-walled. Leaves bisbifid 

 to one-half or more, pluristratose, the thick lamina with an enlarged multicellular 

 pore- or knot-like protuberance at the base of each sinus, the cell walls very 

 thick. Underleaves like the leaves. Male inflorescence terminal, becoming inter- 

 calary on the stem or branch ; bracts and bracteoles like the leaves, the bracteoles 

 plane, without antheridia. Female inflorescence terminal on a stem or branch, 

 the inner series of bracts and bracteoles very different from the leaves. Perianth 

 present. 



The plants of this monotypie family from southern South America are aber- 

 rant but also show certain primitive characteristics. 



Fig. 1. Pseudolepicolea quadrilaciniata. 1 a. Stem with leaves and underleaves, X 30; 

 U, underleaf. 1 b. Bisbifid leaf, X 80; A, the middle sinus. 1 c. Portion of a leaf segment, 

 X 350. 1 d. Leaf cells at the base of the sinus on the lamina, X 350; from A in Pig. 1 b. 

 1 e. Portion of a transverse section of a stem, X 180. 1 f. One series of female bracts and 

 bracteole. 1 g. Perianth with the innermost series of bracts. 1 h. Cells of the perianth mouth. 



Fig. 2. P. georgica. 2 a. Stem, dorsal view, X 30; F, branch of the Frullania type; 

 L, half-leaf with this branch. 2 b, Stem, ventral view, X 40 ; U, underleaf ; F, branch of 

 the Fridlania type; M, branch of the Microlepidozia type; L, half -leaf with this branch. 2 c. 

 Leaf, X 80. 2 d. Portion of a leaf segment, X 350. 2 e. Accessory leaf cells at the base 

 of the sinus of a leaf, X 300. 2 f. Portion of a male inflorescence, X 40; B, concave male 

 bracts; U, plane bracteoles. 2 g. Male bract, X 40. 2 h. Portion of a transverse section 

 of a stem, X 180. 



Figs. 1 f-h after Schiffner, 1911; others after Fulford & Taylor, 1960. 



