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MEMOIRS OF THE NEW YORK BOTANICAL GARDEN 



[VOL. 11 



amphigastriis. Folia sublongitudinaliter inserta, succuba, bi-, tri-. vel quadrifida ad 

 medium, segmentis uniseriatis, fragilibus. Amphigastria variabilia, diminuta, plerum- 

 que seriebus 4 cellularum adjacentium, 1-2 uniseriatis segmento male formato. In- 

 florescentiae non visae. 



Type species: O. chimantana Fulford. 



Odontoseries chimantana Fulford, sp. nov. 



Folia brunnea, sublongitudinaliter insertis, bi-, tri-, vel quadrifida ad medium, 

 segmentis uniseriatis, plerumque fragilibus vel caducis: amphigastria ex una serie, 

 4-cellularum adjacentium constata, 1-2 uniseriatis segmento male formato. 



Plants of medium size, brown, over Sphagnum; stems 1-3 cm long, with leaves 

 to 1 mm broad, rarely branched: branches ventral-intercalary, in the axils of the 

 underleaves. leafy or flagelliform; stems somewhat flattened, with 2 (rarely 3) rows 

 of elongate, dorsal cortical cells between the 2 rows of leaves; in transverse section, 

 of a cortical layer of 6-7 rows of large cells (2 + 2 lateral, 2 smaller ventral), sur- 

 rounding the medulla of 6-8 smaller cells. Rhizoids from the underleaves. Line of 

 leaf insertion oblique, sublongitudinal. Leaves rectangular in outline, spreading, 

 decurrent, bi-, tri-, or quadrifid to near the middle, the segments uniseriate from a 

 2-celled base, fragile soon falling: cells of the lamina tending to be in rows, 52-104 X 

 52 ft, the walls uniformly thickened, the cuticle faintly verruculose. Underleaves 

 reduced, of usually 4 adjacent cells across the stem, and one or two poorly formed. 

 1- to 3- celled uniseriate segments from the outer cells. Male and female inflores- 

 cences not seen. 



PI. 98. Fig. 1, a-i. 



Habitat: Damp bluffs of falls. 



VENEZUELA: Bolivar: Chimanta Massif. Torono-tepui. Cano Mojado, 1910-1970 m, 

 Steyermark & Wurdack 970 (type), 971 p.p., 972 p.p., 973 p.p. (NY). 



zoopsidaceae Xakai [A list of Professor Makai's papers . . . science] 199. 1943. 

 Cephaloziaceae auct. p.p. 



Plants leafy, or thallose with unistratose wings: stem or axis somewhat flattened, 

 with 2 rows of cells on the dorsal side, in transverse section with a cortical layer of 

 6-8 large cells surrounding the medulla of small cells; branches lateral, of the 

 Frullania type (infrequent to rare), most commonly ventral-intercalary, axillary, 

 leafy, or thallose in Pteropsiella, or sometimes flagelliform, or short with few leaves 

 and bearing a male or female inflorescence. Rhizoids short, hyaline with enlarged 

 tips, from small cells from the underleaves. Line of leaf insertion oblique, nearly 

 longitudinal, the leaves succubous. Leaves ovate, unequally bifid or subquadrate 

 to rectangular, bearing 2 long, crescent-shaped "slime" papillae aligned parallel to 

 the margin of the thallus. Underleaves of a transverse row of 2-8 cells usually 

 capped with slime papillae. Plants monoicous or dioicous. Male inflorescence termi- 

 nal on the axis or a shorter branch, often becoming intercalary, the bracts in 6-12 

 series, foliaceous, bifid, the bracteoles like the underleaves. Female inflorescence 

 on a short ventral branch, the bracts and bracteoles in 3 or 4 series, foliaceous, the 

 innermost series largest, bifid. Perianth cylindrical below, 3-keeled above, the 

 mouth of usually 6 long laciniae. Shoot-sporophyte relationship a shoot-calyptra. 

 Capsule oval, brown, the wall of 2 layers of cells. Seta in transverse section of 8 

 outer rows and 4 smaller inner rows of cells. 



Type genus: Zoopsis Hooker f. & Taylor, 1844. 



