256 



MEMOIRS OF THE NEW YORK BOTANICAL GARDEN 



[VOL. 11 



Habitat: On stems, or in cushions or mats, on moist sandstone rock faces 

 and ledges, especially near waterfalls at elevations above 1500 m. 



VENEZUELA: Estado Bolivar: Chimanta Massif, sw edge Apacara-tepui, 1800-2000 m, 

 Steyermark 74981 p.p. <S (NY) ; Torono-tepui, 2165-2180 m, Steyermark & Wurdack 695 p.p. 

 (NY); nw slopes, Churi-tepui (Muru-tepui), Wurdack 34272 p.p. (NY); Sarven-tepui 1750- 

 2000 m, Wurdack 34106 ? (NY); island in Rio Tirica, above Middle Falls, 1925 m, Steyer- 

 mark A Wurdack 465 p.p., 466 <$ p.p. (NY) ; Cerro Venamo, ss escarpment, 1500 m, Steyermark 

 & Dunsterville 92593 (VEN) ; Auyan-tepui, escarpment over El Pefion, 2200 m, Steyer- 

 mark 94037 ,94039 (NY). 



BRITISH GUIANA: without locality Quelch (type G-10868) [as "Guiana Gallica" 

 — see Reimers, 1933, p. 155]. 



5. Micropterygium carinatum (Grev.) Reimers, Hedwigia 76: 166. 1936. 



Jungermannia carinata Greville, Ann. Lyc. Nat. Hist. N.Y. 1 : 276. PI. 23, j. 1-4- 1825. 

 Jungermannia cymbijolia Hooker in Lehmann, Pug. PI. 6 : 60. 1834. 

 Micropterygium cymbijolium (Hook.) Nees, Lindenberg & Gottsche in G. L. & N. Syn. 

 Hep. 234. 1844. 



Micropterygium portoricense Stephani, Hedwigia 27: 294. 1888; Icon. Hep., Micro- 

 pterygium No. 8. 



Leafy stems numerous, from a branched rhizome system, small yellow-green 

 to yellow-brown, prostrate to ascending, usually forming compact mats; stems 

 1-2 cm long, with leaves 0.8-1 mm broad, flattened, lateral branches frequent, 

 ventral flagelliform branches occasional; stem in transverse section of a cortical 

 layer of 12 large cells, 20-24 p. in diameter surrounding the medulla of many 

 smaller cells. Rhizoids in tufts from the scale-leaves of the rhizome and the 

 flagelliform branches. Leaves closely imbricate, spreading with the outer part 

 erect or decurved, 0.5-0.7 mm long, broadly ovate, concave, obtusely keeled, 

 the wing of two to four rows of cells, extending from the tip to the middle or 

 below, the apex acute, the margins and the wing entire or with an occasional 

 projecting cell; cells of the apical portion quadrate-rounded, 15-20 p., the walls 

 thickened, trigones distinct, the cuticle smooth to roughened, verruculose. Under- 

 leaves small, scarcely as broad as the stem, rounded to rectangular with the apex 

 variously lobed or toothed, usually decreasing in size toward the tip of the stem. 

 Plants dioicous, the short sexual branches ventral, on the lower part of a leafy 

 stem. Male branches catkin-like, hyaline or brownish, the bracts very small, in 

 three to ten pairs, concave, ovate, acute to bifid, the bracteoles small lanceolate. 

 Female branches very short, the bracts and bracteoles keeled, in three series, the 

 innermost bracts to 2 mm long, long ovate, the margin of the upper part with 

 occasional short cilia. Perianth to 3 mm long, three-keeled above, the mouth 

 contracted, ciliate with cilia 0.8-1.2 m long. Spores and sporophytes not seen. 

 PI. 57. Fig. 5, a-e. 



Habitat: On twigs and branches, logs and sometimes on rocks in forests. 



PUERTO RICO: Canovanas, Pagan 372 (Y), 384 (NY); Cano de la Punta, Steere 6436 

 (NY, Hb Fulford) ; Mt. Britton, Steere 4275 (NY, Hb Fulford) ; Sierra Naguabo 465-720 m. 

 Shafer 3751 c? (NY, Y), 3776a (NY, Y); El Yunque, Shajer 3775 p.p. (NY, Y), 3776 p.p. (Y), 

 3776a (NY), Evans 9 (Y), 50 p.p. (NY, Y). 53 (NY, Y, US), 53a (Y), 115 (BM, NY, Y) ; 

 Pagan 616 (NY, Y) ; Steere 4132, 4133 (NY, Hb Fulford); without locality, Schwanecke, 

 type of M. portoricenses (BM) ; without locality, Sintenis (BM). 



GUADELOUPE: Deshayes, Duss 84 (NY); Gabon, P. & V. Allorge (BR. PC, US); 

 Morne Hirondelle, Duss 138, 157 (NY) ; Ravine-Chaude, Dw.ss 297 (NY) ; Matylis, 1200 m, 

 Questel 3831 (Hb. Questel) ; without locality, Dr. Madianna Hb. Greville (type, NY) ; without 

 locality, without collector, as J. cymbijolia, probably a portion of the type of J. cymbijolia 

 (NY); Lamentin, Duss 277 (NY); without locality, Duss 78 (NY), 84 (NY, Y) ; without 

 locality, I'Herminier (BM) ; without locality, Parker (NY). 



