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MEMOIRS OF THE NEW YORK BOTANICAL GARDEN 



[VOL. 11 



ovate, long laciniate-ciliate above. Perianth to 3.5 mm long, the mouth laeiniate- 

 ciliate with very long cilia. Sporophyte not seen. PI. 58. Fig. 7, a-c. 



Habitat: On moist cliffs, rocks and banks, in spray of waterfalls, and on 

 trees, forests. 



VENEZUELA: Estado Amazonas: Rio Orinoco, Cerro Yapacana, Cumbre, 1200 m, 

 Maguire, Cowan & Wurdack 3(1701 (NY); Serrania Paru, Rio Parii, Cano Asisa, 1800 m, 

 Cowan & Wurdack 31316, 31430 (NY), Estado Bolivar: Chimanta Massif, Abacapa-tepui, 

 1200-1600 m, Steyermark 75150 (NY) ; between S. Teresita de Kavanayen and Kavanayen, 

 1200 m, Steyermark 60478 (F) ; Perion, Oriyarn-tepui, 1800 m, Vareschi 4803 (VEN). 



BRAZIL: Bahia: Rio das Contas, 600 m, Lutzelburg 1913 (type, Hb Herzog). 



8. Micropterygium Ieiophyllum Spruce, Trans. Proc. Bot. Soc. Edinb. 15: 

 386. 1885. 



Jungermannia ptcrygophyllum Nees p.p. in Martius, FI. Bras. 1(1): 377. 1833; in 

 Martius, Icon, plant, brasil. p. 34 [excl. t. 19] 1828-1834. 



Herpetium pterygophyllum Nees ms. 



Micropterygium vulgare Nees, Lindcnberg, Gottscho var. a p.p. in G. L. & N. Svn. Hop. 

 234. 1844. 



Micropterygium ptcrygophyllum (Nees) Trevisan p.p., Mem. 1st. Lomb. III. 4: 413. 

 1877. 



Leafy stems of medium size, yellowish green, ascendent from a branched 

 rhizome, in loose tufts or mats; stems 3-4 cm long, with leaves, to 1.5 mm broad, 

 simple to bipinnately branched, sometimes becoming flagclliform above, ventral 

 flagelliform branches frequent. Rhizoids brown, in tufts from scale-leaves of 

 the flagelliform branches and the rhizome. Leaves spreading, imbricate, often 

 undulate when dry, more or less open-plane below, ovate-truncate to rectangular 

 in outline, to 0.8 mm long, 0.4 mm broad at the middle, concave and with a broad 

 keel and a wide, conspicuous wing above, the dorsal lobe twice as broad as the 

 ventral, the apex open, broad, truncate, the margins and wing coarsely dentate- 

 serrate; cells of the upper part mostly quadrate, 18-20 p. across, the walls equally 

 thickened, trigones inconspicuous, the cuticle smooth to faintly verruculose. 

 Underleaves large, conspicuous, mostly broader than the stem, longer than broad, 

 ovate to rectangular, the apex with two to four triangular teeth three to seven 

 cells long, the margins entire. Plants dioicous, the short sexual branches near the 

 base of a leafy stem. Male branches long, flaccid, slender, catkin-like, hyaline 

 or tinged with brown, the bracts in to 16 pairs, short-ovate, concave, squarrose 

 above, the apex of two long cells, the bracteoles plane, like the underleaves, 

 smaller. Female branches very short, the bracts and bracteoles long, keeled 

 below, in three or four series, the innermost series to 1.5 mm long, ovate, the 

 upper part divided into two or three, toothed segments. Perianth to 4 mm long, 

 three-keeled with additional folds above, the mouth contracted, long laciniate- 

 ciliate, the cells long. Spores red-brown, 10-12 p., faintly verruculose. PI. 58. 

 Fig. 8, a-d. 



Habitat: On logs, trunks of trees, rocks, rarely over soil, in forests at 

 elevations usually below 500 m. 



Plate 58 



Fig. 7. Micropterygium reimersianum. 7 a. Stem, dorsal view, X 75. 7 b. Stem, ventral 

 view, X 75. 7 c. Cells of the dorsal margin of a leaf near the apex, X 700. 



Fig. 8. M. Ieiophyllum. 8 a. Stem, ventral view, X 75. 8 b. Cells of the dorsal margin 

 of a leaf near the apex, X 700. 8 c. Portion of a female bract, innermost series, X 75. 8d. One 

 of the laciniae of the perianth mouth, X 300. 



Figure 7 drawn from the type. 



