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MEMOIRS OF THE NEW YORK BOTANICAL GARDEN 



[VOL. 11 



triangular from a 4-6-celled base, ending in a tip of one or two cells; leaf-cells at 

 the base of the segments 40-50x27 p., the walls thickened, the cuticle smooth. 

 Underleaves scarcely smaller than the leaves, trifid (rarely bifid) to one-third of 

 their length. Male and female inflorescences and sporophyte not seen. PI. 39. 

 Fig. 1, a-f. 



Habitat: Swampy ground. 



PATAGONIA— TIERRA DEL FUEGO: Guaitecas I.: Melinca, Halle [1908] (type 

 G-376). 



Bonneria Fulford & J. Taylor, Brittonia 13: 334. 1961. 



Lepidozia auctt. p.p. 



Plants of small to medium size, brownish-green; stems irregularly branched, 

 the lateral branches of one side of the stem of the Frullania type, with a dorsal 

 lanceolate half-leaf, and on the other side of the Microlepidozia type, with a 

 ventral unequally bifid half-leaf; ventral branches leafy, of the Acromastigum 

 type, with a lanceolate half-underleaf adjacent to the branch, or axillary inter- 

 calary and long, leafy or flagelliform, or short sexual ; stems in transverse section 

 of a unistratose layer of 12 large, thin-walled cells similar to those of the medulla. 

 Rhizoids in tufts on the scale-leaves of the flagelliform branches. Line of leaf 

 insertion transverse to slightly oblique, the leaves tending to be succubous. Leaves 

 spreading, cuneate, unequally bifid or trifid to one-third of their length, the 

 leaf-segments triangular, acute, the leaf-cells quadrate to rectangular in outline. 

 Underleaves similar to the leaves, smaller. Plants dioicous (?) . Male inflorescence 

 on a short ventral sexual branch, the bracts and bracteoles in 25 or more series. 

 Female inflorescence and sporophyte not seen. 



Type species: Lepidozia granatensis Gottsche. 



This monotypic genus is unique in that three types of terminal branching, 

 the Frullania, Microlepidozia, and Acromastigum types, occur on one stem along 

 with the ventral-intercalary branches in the axils of the underleaves. The latter 

 may be leafy, flagelliform, or sexual. This situation represents an extremely 

 primitive condition not known in any other genus of Hepaticae. Although the 

 Acromastigum type of branching also occurs in both Acromastigum and Para- 

 cromastigum, these latter genera do not possess branches of the Microlepidozia 

 type. 



1. Bonneria granatensis (Gottsche) Fulford & J. Taylor, Brittonia 13: 334. 

 /. 42-51. 1961. 



Lepidozia granatensis Gottsche, Ann. Sci. Nat. V. 1 : 139. 1864. 



Plate 39 



Paracrumastigum subsimplex. 1 a. Stem, dorsal view, X40; F, branch of the Frullania 

 type, FL, half-leaf with this branch. 1 b. Stem, ventral view, X45; A, branch of the 

 Acromastigum type; AL, the half-underleaf with this branch; F, branch of the Frullania 

 type; FL, dorsal half-leaf with this branch. 1 c. Leaves, X 57. 1 d. Segment of a leaf, X 375. 

 1 e. Underleaf, X 57. 1 f. Transverse section of the stem, X 185. 



Bonneria granatensis. 1 a. Stem, ventral view, X40; A, branch of the Acromastigum 

 type; AL, half-underleaf with this branch; F, branch of the Frullania type; FL, dorsal 

 half-leaf with this branch, lb. Another stem, ventral view, X40; M, branch of the 

 Microlepidozia type; ML, ventral half-leaf with this branch. 1 c. Leaf, X 57. 1 d. Segment of a 

 leaf, X 375. 1 e. Underleaf, X 57. 1 f. Transverse section of the stem, X 185. 



Drawings after Fulford and J. Taylor, 1959. 



