NO. 29 THREE CLUB-MOSSES FROM PANAMA MAXON 3 



the sporophyls exactly like the foliar leaves; sporangia reniforin, 1.2 

 to 1.3 mm. broad, thus j^rotruding beyond the base of the s])orophyl 

 a distance of about 0.5 iiim. on each side. 



Type in the U. S. National Herbarium, no. 676085 ; collected from 

 a tree trunk in humid forest of the upper Caldera watershed between 

 Camp I and the Divide, Holcomb's trail, above El Boquete, Chiriqui, 

 Panama, altitude about 1750 meters, March 23, 191 1, by William R. 

 Maxon (no. 5636). 



Only three plants of the present species were observed, these grow- 

 ing together ; the largest has served for the description. Presumably 

 the plant attains a greater size than shown by the specimens at hand ; 

 but even this small amount of material is ample to indicate the marked 

 peculiarity and distinctness of the species. The leaves are truly 

 capillary and mark it as the narrowest-leaved species yet discovered 

 in tropical America. It is a member of the section Selago, and is 

 related (though not at all closely) to L. pithy aides Schlecht. and 

 Cham., of Mexico, Guatemala, and Cuba, a species which is equally 

 well marked by its stout woody stems and very much longer, bisul- 

 cate, refiexed leaves about i mm. broad. 



LYCOPODIUM WATSONIANUM Maxon, sp. nov. 



Plate 3 

 A slender pendent epiphyte, 35 cm. long, about 8 times dichotomous, 

 interruptedly sporangiate in the upper third. Stem delicate, 0.5 to 

 0.7 mm. in diameter, yellowish green like the whole plant, the 

 branches slender, unequally developed (perhaps through injury), 

 forked at a slight angle ; leaves numerous but not close, borne in 8 

 ranks, in the dried plant appearing almost whorled, divergent 

 to obliquely ascending, mostly falcate, slender but very rigid, thick, 

 linear-acicular from a slightly broader base, 5 to 8 mm. long, 0.4 to 

 0.5 mm. broad at the base, 0.3 to 0.4 mm. broad below the middle, or 

 much narrower by the curvature of the margins, entire, all twisted at 

 the base, the upper surface slightly convex, the lower surface broadly 

 or sometimes deeply concave, the leaf in drying not infrequently sub- 

 tubulose or irregularly plicate, the costse very slender, concealed, or 

 evident only by transmitted light as a whitish line; sporophyls in 

 alternating zones i to 1.5 cm. long, averaging shorter than the foliar 

 leaves (4 to 5 mm. long), linear-acicular from an irregularly ovate to 

 broadly deltoid base (this 0.7 to i mm. broad), the margins here undu- 

 late to irregularly and bluntly erose-dentate, elsewhere entire ; spor- 

 angia reniform, partially concealed by the expanded bases of the 

 sporophyls. 



