Evans : New West Indian Lejeuneae 387 



entire : inflorescence autoicous : 9 inflorescence arising from the 

 stem or from a leading branch ; bracts obliquely to widely spread- 

 ing, complicate, sometimes with a narrow and entire wing along 

 keel, lobe oblong to obovate, 0.75 mm. long, 0.4 mm. wide, 

 rounded at apex, lobule similar to lobe and of about the same 

 size, rounded to obtuse at the apex ; bracteole obovate, 0.7 mm. 

 long, 0.4 mm. wide, rounded to truncate at apex ; perianth about half 

 exserted beyond the bracts, obovate, 1.2 mm. long, 0.85 mm. wide, 

 rounded to truncate at apex with a short beak, lateral keels winged 

 to about the middle, the wings coarsely and irregularly laciniate 

 or lacerate to within from one to three cells of the keels, the lacin- 

 iae straight or variously curved and contorted, rarely branched, 

 j usually from five to ten cells long and two cells wide at base or to 

 beyond the middle, antical surface of perianth smooth, postical 

 surface bearing an indefinite number of scattered laciniae, some of 

 them often arranged in two interrupted longitudinal lines, appar- 

 ently representing the two angles of an obsolete postical keel : cT 

 inflorescence occupying a short lateral branch or terminal on a 

 longer branch, occasionally borne on a subfloral innovation, appar- 

 ently never proliferating ; bracts in from two to six pairs, imbri- 

 cated, subequally bifid, both lobe and lobule somewhat narrowed 

 toward the rounded apex, keel not winged but slightly crenulate 

 from projecting cells ; bracteoles restricted to base of spike, simi- 

 lar to the underleaves but smaller : mature sporophyte not seen. 

 (Plate 28, figures i 5-20.) 



On bark of trees. Hayti : Plaisance to Marmelade, 800 m. 



NasA (6 S4 ) m 



In its autoicous inflorescence 5. laceratum agrees with S. bar- 



bifl { 



or ">n (Lindenb. & Gottsche) Evans, 5. vincentimtm (Gottsche) 

 Irevis.,* and Platylejennea Kroneana Steph.,f the four together con- 

 stituting a group of closely related species. S. barbiflonim and 5. 

 Vl ncentinum are rather widely distributed in tropical America and 

 both 0cci *r in the West Indies. P. Kroneana is known only from 

 the original material, collected by Krone at Santa Caterina, Brazil. 



ls last species is erroneously described as dioicous, but a por- 

 tl0n of the type specimen kindly communicated by its author is. 

 c e *rly autoicous and is so labeled on the packet. In distinguish- 

 ln § these four species from one another the most important char- 

 aCters are drawn from the bracteoles and perianths, but the leaves 

 and ^erleaves sometimes yield a few supplementary differences. 



SeeEv 



-^vans, Bull Torrey Club 34 1 540-543- //• *r. / 

 THcdwigia 35s II? . i8q6> 



1 1- 1 4. i9° 8 - 



