352 



MEMOIRS OF THE NEW YORK BOTANICAL GARDEN 



[VOL. 11 



tiny, the cuticle faintly verruculose. Underleaves of 1 or 2 cells on vegetative stems, 

 becoming larger, ovate to retuse near the tips of female branches. Plants dioicous. 

 Male inflorescence terminal becoming intercalary on the stem or leafy branch, the 

 bracts in 4 to 8 series, leaf-like, ovate, folded, monandrous, bracteoles tiny. Female 

 inflorescence terminal on a leafy axis, the bracts and bracteoles in several series, 

 somewhat larger than the leaves, broadly ovate, retuse or bifid, the bracteoles broad- 

 ovate to shortly bifid. Perianth short, cylindrical below, obscurely 3-keeled above, 

 the mouth irregularly torn, lobed, crenulate (?). Gemmae 2-celled, green or reddish, 

 in clusters at the tips of the stems. 



PI. 91. Fig. 2, a-i. 



Habitat: In depressions on moist clay soil. 



PUERTO RICO: Pico del Oeste, 1020 m, Fulford, Crandall & Stotler 402, 412 (Hb Fulford) ; 

 Indiero Baja, n of Yauco, 800-900 m, Britton & Britton 7240 (NY). 



DOMINICA: Laudat, Valley Roseau, Elliott 68, 81 (type MANCH), 82 (BM); Laudat, 

 Lloyd 277 p.p. (NY). 



MARTINIQUE: Bois de la Medaille, Duss 1181 (NY). 



TRINIDAD: s.l., Fendler (NY). 



trabacellulaceae Fulford in Steyermark, Acta Bot. Venezuelica 2: 85. 1967. 



Leafy stems flattened, prostrate, pigmented with brown, suggesting a coarse 

 brownish Cephalozia or Odontoschisma, the branches ventral-intercalary, leafy or 

 occasionally short, male or female; stems with 2-5 rows of large cells on the dorsal 

 side between the rows of leaves; in transverse section the cortical layer a row of 

 10-12 large cells (those of the ventral side sometimes smaller), surrounding a 

 medulla of many small cells with thickened walls. Rhizoids scattered on the ventral 

 side of the stem. Line of leaf insertion oblique, sublongitudinal. Leaves succubous, 

 subquadrate, retuse to bifid, broadly ovate-truncate, the cells large, with or without 

 conspicuous bands of thickening on the walls. Underleaves none. Male inflorescence 

 terminal becoming intercalary on the stem or occasionally on a short ventral branch, 

 the bracts large, the bracteoles absent. Female inflorescence on a short ventral 

 branch, the bracts and bracteoles in 4-6 series, the outer series bifid, the inner 

 series larger, bi-, tri- or quadrifid. Perianth long, 3-keeled above, the third keel 

 ventral, of 1 or 2 layers of cells below, 1 layer above, the mouth contracted, setulose 

 to short-ciliate. Sporeling or sporophyte not seen. 



Type genus: Trabacellula Fulford, 1968. 



Key to the Genera 



Leaves subquadrate to rounded, undivided or scarcely retuse; leaf cells with conspicu- 

 ous bands of thickening, even in dried material. Trabacellula. 

 Leaves subquadrate, bifid; leaf cells with occasional very weak bands of thickening. 



Fuscocephaloziopsis. 



Trabacellula Fulford in Steyermark, Acta Bot. Venezuelica 2: 86. 1967. 



Plants coarse, of the habit of a large Odontoschisma, pigmented with brown, 

 irregularly branched; branches ventral-intercalary, leafy or more rarely bearing a 

 male or female inflorescence; stem flattened, with several dorsal rows of cells 

 between the 2 rows of leaves; in transverse section of 10-12 rows of similar, large 

 cortical cells surrounding the medulla of many smaller cells with thickened brown 

 walls. Rhizoids from the ventral side of the stem, short, the tips branched. Line 

 of leaf insertion almost longitudinal. Leaves subquadrate, slightly retuse, the upper 

 (postical) base conspicuously cordate by a few cells, leaf cells as well as those of 



