354 



MEMOIRS OF THE NEW YORK BOTANICAL GARDEN 



[VOL. 11 



Plate 92 



Fig. 1. Trabacellula tumidula. 1 a. Stem, dorsal view, X 75. 1 b. Stem, ventral view, X 75. 

 1 c. Cells of the upper margin of a leaf, X 200. 1 d. Marginal cell of a leaf showing the bands 

 and rough surface, X 700. 1 e. Transverse section of a stem, X 150. 1 f. Three male bracts and 

 a leaf, dorsal view, X 35. 1 g. Female bract, inner series, X 35. 1 h. Female bracteole, X 35. 

 1 i. Female inflorescence and perianth, X 25. 1 j. Portion of the mouth of a perianth, x 150. 

 After Fulford, 1967. 



or female inflorescence. Stems somewhat flattened, with 2 dorsal rows of large cells 

 between opposite rows of leaves; stem in transverse section brownish, with a layer 

 of about 10 rows of large thin-walled cortical cells (the ventral rows a little smaller), 

 surrounding the medulla of smaller cells with thicker walls, conspicuous trigones, 

 and narrow pits. Rhizoids on the ventral side of the stem. Leaf insertion sublongi- 

 tudinal, the leaves succubous. Leaves subquadrate shortly decurrent, bilobed, the 



