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MEMOIRS OF THE NEW YORK BOTANICAL GARDEN 



VOL. 11 



mediate thickenings developed in the elongate cells of the apical portion. Female 

 branches occasional, the bracts and bracteoles of the innermost series large, ovate, 

 divided to one-sixth their length into two or three erenulate to spinose laciniae, 

 the lateral margins crennlate to ehort-ciliate, the cells to 48 n long, 24 \x wide, 

 with thin walls. Perianth mouth Laeiniate-ciliate. Male branches not seen. Fig. 



30, a-f . 



Habitat : In mats on logs and bases of trees. 



CUBA: Mt. Verde, Wright, Hep. Cubenses (type G, isotypes FH, YU) ; LoJna del Gato, 

 Fr. Clement 351 (NY). 



JAMAICA: Caledonia Peak, M. Farr 1007 (IJ) ; Fairy Glade, M. Farr 771, 788 {13); 

 Hardwar Gap, Baxter 11 (KANU) ; Hardwar Gap to waterfall, M. Farr 866, 867 (IJ) ; 

 Moree's Gap, Evans 48 (YU) ; New Haven Gap, M. Farr 928 (IJ) ; Tweedside, Underwood 

 2042 (NY). 



GUADELOUPE: Galion, Le Gallo 266 (Hb Le Gallo). 

 DOMINICA: Castle Bruce River, Eliott lid (BM). 



The elongate cells with large trigones and knot-like intermediate thickenings 

 are conspicuous just below the upper margin of the underleaves. This together 

 with the size of the leaf-cells serve to distinguish the species from B. jamaicensis. 



31. Bazzania arcuata (Lindenberg & Gottsche) Trevisan. Mem. 1st. Lomb. 13: 



414. 1877. 



Mastigobryum arcuatum Lindenberg & Gottsche in G. L. & N. Syn. Hep. 718. 1847. 

 Mastigobryum martianum Gottsche in Stephani, Hedw. 25: 205. pi. 16. f. 9-12. 1880. Non 



M. martianum Lindberg. 

 Mastigobryum stolonifcrum var. cubense Gottsche ms. 

 Mastigobryum ecuadorense Stephani, Spec. Hep. 6: 461. 1924. 



Plants of medium size to large, olive-green, deeply pigmented with brown ; 

 stems to 5 cm or more in length, with leaves to 3 or 4 mm broad ; lateral branches 

 frequent, diverging at a wide angle. Line of leaf insertion hook-formed in the 

 upper part. Leaves imbricate, spreading and strongly arcuate or falcate from 

 a broad base with a distinct enlarged rectangular ventral auricle, asymmetrically 

 ovate, 2-2.5 mm long, 0.8-1.4 mm broad at the base, narrowed to 0.32-0.48 mm 

 at the tridentate apex; teeth acute, to 5 cells high, to 6 cells wide, the basiscopic 

 tooth often much smaller, the sinuses mostly hmulate; leaf-cells thin-walled, 

 the trigones conspicuous, with bulging sides, the lumina angular-rounded, cuticle 

 slightly verruculose ; cells of the apical region 20-26 X 20-22 /x. Underleaves 

 subrectangular to orbicular, twice as broad as the stem, cordate at the base, 

 0.6-1.4 mm long, 0.7-1.0 mm broad at the base, the apical portion rounded- 

 entire or more rarely straight, undulate, or with a short tooth. Male bracts 

 broadly concave. Female inflorescence occasional, the innermost series of bracts 

 and bracteoles divided to one-fourth or less into three or four segments. Perianth 

 mouth laeiniate-ciliate. Sporophyte not seen. Fig. 31, a-h. 



Habitat : On moist cliff ledges, rocks and trees in elevated regions. 



CUBA: Domo del Gato (as M. stolonifera var. cubense), Wright (G). 



MEXICO: San Pedro Tepinapa, 2000-2500 ft, Liebmann (type G) ; Puebla: uear Villa 

 Juarez, Sharp 3150 (TENN). 



GUATEMALA: Alta Verapaz, Standley 90324, 90635 (F) ; Huehuetenaugp, Steyermarh 

 49949, 49955 (F). 



COSTA RICA: Mt. Hacum, Tonduz (G). 



COLOMBIA: Rio Apaporis, Schultcs 4- Cabrera 11959 (FH). 



