1968] 



LEAFY HEPATICAE OF LATIN AMERICA — PART III 



279 



calypogeiaceae H. Arnell, Skand. Fl. 2A: 189. 1928. 



Trigonantheae subfam. Calypogeieae K. Miiller in Rabenhorst, Krypt.-Fl. 6 2 : 226. 1913. 



Sporeling of the Nardia type, i.e., the protonema an irregular mass of cells 

 developed outside the exospore; in Calypogeia the stem with primary leaves radially 

 symmetric, the stem with juvenile or the adult type leaves dorsiventral. Branches 

 ventral-intercalary, axillary, leafy or rarely flagelliform, or short sexual. Stem in 

 transverse section of many similar cells, the cortical layer often slightly larger or 

 smaller than the cells of the medulla. Rhizoids from small cells of the lower part 

 of the underleaf. Line of leaf insertion oblique, the leaves incubous. Leaves undi- 

 vided, acute or bifid. Underleaves ovate to orbicular, rounded, acute, bifid with or 

 without a lateral tooth, or bisbifid. Male inflorescence ventral, catkin-like. Female 

 inflorescence ventral, short, the bracts and bracteoles scale-like, the archegonia at 

 the bottom of a long, pendant perigynium of the Calypogeia type. Perianth absent. 

 Capsule wall 2-layered, at maturity divided into 4 erect, spirally twisted valves. 



Type genus: Calypogeia Raddi corr. Corda, Opiz, Beitr. Naturg. 653. 1829. 



Calypogeia Raddi corr. Corda, Opiz, Beitr. Naturg. 653. 1829. 

 Cincinnulus Dumortier, Comm. Bot. 113. 1822. 



Kantia S.F. Gray corr. Carrington, Trans. Proc. Bot. Soc. Edinb. 10: 308. 1870. 



Plants prostrate, green to whitish, in mats or scattered among other bryophytes; 

 stems irregularly branched, the branches ventral-intercalary, axillary, leafy, or 

 rarely flagelliform, or short, male or female; stem in transverse section of many 

 more or less similar cells, the single cortical layer often in part slightly larger or 

 smaller or with thicker walls than the medulla. Rhizoids long, in tufts from small 

 cells of the lower part of some underleaves. Line of leaf insertion oblique, often 

 nearly longitudinal, the leaves incubous. Leaves symmetric or asymmetric, widely 

 spreading to ascendant or falcate, often long decurrent, often bordered, the apex 

 broad-rounded, acute, apiculate or shortly bifid; leaf cells subquadrate, rectangular 

 or hexangular, the walls uniformly thickened or with conspicuous trigones. Under- 

 leaves large, broader than the stem, or very small, ovate to orbicular or reniform, 

 entire or bifid, bifid with a lateral tooth or bisbifid. Plants dioicous. Male inflores- 

 cence a short ventral branch, solitary or in pairs or threes, catkin-like, pale to 

 hyaline, the bracts small, bifid, concave. Female inflorescence a short ventral 

 branch, the bracts and bracteoles scale-like. Perigynium fleshy, pendant, cylin- 

 drical, of the Calypogeia type with scales at the mouth. Sporophyte within the 

 perigynium until maturity, the capsule cylindrical, the valves slender, spirally 

 twisted, the seta (where known) in transverse section of 16 outer cells surrounding 

 about 16 similar cells. Gemmae on erect, radial, small-leaved shoots, green to hyaline, 

 1- or 2-celled. 



Type species: Calypogeia jissa (L.) Raddi. [Northern Hemisphere] 



Key to the Species 



1. Underleaves broadly ovate to orbicular, undivided, retuse or rarely cleft; leaves subrec- 

 tangular, undivided (subquadrate-retuse in C. retusa, broadly triangular, long decurrent 

 in C. boliviano) . 



2. Leaves broadly triangular, long decurrent. 10. C. boliviano. 



2. Leaves subquadrate oblong to long subrectangular. 



3. Leaves strongly asymmetric, bordered by several rows of narrow, elongate cells 

 obliquely overlapping. 1. C. rhynchophylla. 



3. Leaves more or less symmetric. 



