222 



MEMOIRS OF THE NEW YORK BOTANICAL GARDEN 



[VOL. 11 



Plants small, dark brown with greenish to light brown tips, in tufts or among 

 other bryophytes; stems slender, more or less erect, radial, 2-4 cm long, with 

 leaves 0.6-0.9 mm broad, irregularly branched and bearing long brown to 

 colorless stolons; lateral branches long, leafy, the ventral branches intercalary, 

 long leafy or flagelliform, or long brown or colorless stolon-like, or enlarged 

 turgid, lighter in color and bearing a female inflorescence, or short sexual; stem 

 in transverse section of a single layer of 12 larger, thick-walled cortical cells, 

 surrounding the medulla of smaller cells. Line of leaf insertion transverse. Leaves 

 and underleaves alike, distant to approximate erect-spreading, 0.42-0.48 mm long, 

 0.36 mm wide at the middle, the margins of the lamina entire, quadrifid to one-half 

 or two-thirds of their length; segments straight, long, divergent, lanceolate, 

 four cells wide at the base ; cells at the base of the segments 27-36 x 18-22 p., 

 the walls uniformly thickened the trigones inconspicuous, the cuticle faintly 

 verruculose. Plants dioicous. Male inflorescence on a short ventral sexual branch, 

 the bracts and bracteoles in five or more series, the bracts concave, the bracteoles 

 plane; antheridia one or two in the axils of the bracts. Female inflorescence 

 terminal on a long flagelliform branch ending in an enlarged turgid tip, the bracts 

 in three series, quadrate to broadly orbicular in outline, the apical portion 

 variously incised, with an occasional marginal tooth. Perianth mouth (immature) 

 undivided, entire. Sporophyte not seen. PI. 48. Fig. 3, a-g. 



Habitat: Decayed logs, over rocks and mixed with other bryophytes in 

 woods. 



PATAGONIA— TIERRA DEL FUEGO: Pto Bueno, Dusen (type G-96), Dusen 43 

 (G, S-PA), Dusen, s.n., (K, NY); si, ex Hb Bescherelle (G) ; Rio Azopardo, Dusen (G-97) ; 

 Hoste I., Spegazzini 201 (as L. capillaris) (G) ; Basket I., Spegazzini (G-98). 



4. Micrisophylla cucullifolia (Stephani) Fulford, Brittonia 14: 133. /. 115- 

 131. 1962. 



Lepidozia cucullifolia Stephani, Bihang, Sv. Vet.-akad. Handl. III. 26°: 51. 1900; Icon. 



Hep., Lepidozia No. 138. 

 Isotachis symmetrica Stephani, Spec. Hep. 3: 661. 1909; Icon. Hep., Isotachis No. 28. 



Plants long, flaccid, whitish-green to greenish brown or dark brown, in 

 tufts or mats or among other bryophytes; stems slender, more or less erect, 

 radial, to 3 cm or more long, with leaves 0.32-0.48 mm broad, irregularly sparingly 

 to abundantly branched and with long light or dark colored stolons; lateral 

 branches leafy, long, scarce, ventral branches intercalary, numerous, long, 

 leafy or flagelliform, or long, light or dark colored, stolon-like, or short-sexual; 

 stem in transverse section with a cortical layer of 20-24 larger cells with thicker 

 walls and deeper pigmentation surrounding the medulla, the cortical cells smaller 

 in lighter colored, spongy stems. Line of leaf insertion transverse. Leaves 

 and underleaves alike, distant to imbricate, spreading-concave, incurved above, 

 subquadrate in outline, averaging 0.5 mm long, 0.56 mm wide, the base curved, 



Plate 48 



Fig. 3. Micrisophylla mollis. 3 a. Stem, ventral view, X 80. 3 b. Leaf, X 80. 3 c. Leaf 

 segment, X 350. 3 d. Small leaf from a turgid axis, X 80. 3 e. Transverse section of a stem, 

 X 200. 3f. Female bracts of the outer, intermediate, and inner series, X 40. 3g. Portion of 

 the mouth of an undeveloped perianth, X 80. 



Fig. 4. M. cucullifolia. 4 a. Stem, ventral view, X 85. 4 b. Leaves, X 80. 4 c. Leaf segment, 

 X 350. 4 d. Very slender stem, ventral view, X 85. 4 e. Transverse section of a stem, X 200. 

 4 f. Female bracts of the outer, intermediate and inner series, X 50. 4 g. Cells of the mouth of 

 the perianth, X 350. Drawings after Fulford, 1962. 



