103. SELAGIXELLA. A 1 . MOXOSTELICAE. a*. RADICANTES. 75 



on the inner side at the base. Spikes solitary or double, IV* 2 mm. 

 diam. ; sporophylla ovate-oblong, acute or acuminate, minutely denticulate, 

 ascending, at length spreading; macrospores 2 in a macrosporangium, 

 whitish, more or less rugulose on the basal side, the apex flattened, 

 without radiating ribs, encircled by a ring-shaped crest; microspores 

 probably wanting. 

 Borneo. 



(17) S. langirensis. c. A. . K., Bull. Btz., 1913, XI, 26; S. 

 longaristata, v. A. v. R. (not Hieron.), Bull. Btz., 1911, I, 16. 



Shoots ascending from a decumbent base, 15 20 cm. long, rather 

 copiously pinnate, the stem 1 2 mm. thick, sulcate or convex on the 

 face, convex on the back, 6 7 mm. broad including the lateral leaves; 

 pinnae to 10 cm. long, pinnately compound; ultimate branchlets 3 mm. 

 broad. Leaves of the lower plane spaced on the stem, subcontiguous on 

 the branchlets; of the stem spreading or deflexed, very unequal-sided, 

 oblong, bluntish, indistinctly spuriously veined, the upper side serrulate, 

 obsoletely denticulate towards the apex, gradually spinuloso-ciliolate towards 

 the broadly cordate base, the lower side entire, obsoletely denticulate 

 towards the apex, rotundate or subcordate at the base, the upper surface 

 sparingly minutely spinulose towards the lower edge, the largest leaves 

 3 4 mm. long and Va as broad ; of the secondary rachises similar but 

 the ciliae longer; of the ultimate branchlets nearly equal-sided, blunt, 

 more distinctly spuriously veined, for the rest similar to those of the 

 stem but the upper side rather spuriously margined, rotundate-cuneate at 

 the base, the lower side rather rounded at the base, the upper surface 

 not invariably spinulose near the lower edge, the largest leaves 2 mm. 

 long; leaves of the upper plane erect, spaced on the stem, imbricate on 

 the ultimate branchlets; of the stem oblong, cuspidate-acuminate, remotely 

 spinuloso-serrulate, obliquely rotundate-truncate at the base, the largest 

 leaves 2Y mm. long, the cusp V* as long as the blade; of the ultimate 

 branchlets similar but much smaller, with the cusp proportionally longer, 

 the edges remotely serrulate, the outer base narrowly rounded, the inner 

 base rotundate-cuneate. Spikes short, 1 V 2 2 mm. diam. ; sporophylla sub- 

 isomorphous, ovate, acute, keeled, minutely denticulate, the ventral ones 

 somewhat larger than the others, to 2 mm. long; macrospores white, 

 only 2 in a macrosporangium, finely and densely rugulose, the apex 

 flattened, without radiating ribs, encircled by a ring-shaped crest; mi- 



