116 103. SELAGINELLA. A^ MONOSTELICAE. a*. ASCENDENT^S. 



morphous, ovate-oblong, 1 mm. long, acute or shortly mucronulate, 

 keeled, minutely serrulate, the lower more spreading than the higher; 

 macrospores 2 in a macrosporangium, whitish, verruculose-rugulose, the 

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

 microspores probably wanting. 

 Borneo. 



(63) S. billltonensis, «. ^. r. JI., Bull. Btz., 1914, XVI, 43; 

 S. Grabowskyi, Warb., v. A. v. R., Bull. Btz., 1911, I, 16, p. p. 



Resembles in aspect S. sungemagneana v. A. v. R., but: Pinnulae 

 simple or forked; ultimate branchlets a little broader; lateral leaves a 

 little larger, indistinctly spuriously veined and pellucid-margined, shortly 

 ciliolate towards the base on the upper side, those of the stem rounded 

 on the upper side at the base; macrospores pale-yellow-brown. 



Billiton. 



(64) S. Vanvuureni, ». A. ». k.. Bull. Btz., 1914, XVI, 44. 

 Shoots erect from a decumbent base, 10—20 cm. long, branched down 



nearly to the base, the branching between dichotomous and pinnate, the 

 stem obtusely quadrangular on the upper side, rounded on the lower 

 side, 2 mm. thick, the main rachis 8 — 10 mm. broad including the lateral 

 leaves; pinnae much ascending, suberect, irregularly compound; branchlets 

 very short, 2 — 3 mm. broad. Leaves heteromorphous ; lateral leaves 

 horizontal and remote on the stem, ascending and imbricate on the 

 branchlets; of the stem rather straight, oblong, blunt, unequal-sided at 

 the base, indistinctly spuriously veined, the upper side copiously minutely 

 denticulate, subpellucid-margined, broadly rounded at the base, the lower 

 side entire, mostly provided with a few (1—4) minute teeth at the 

 narrowly rotundate-truncate base, the largest leaves 5 mm. long, nearly 

 2 mm. broad; of the branchlets similar, the largest 3 mm. long, with 

 the upper side more distinctly pellucid-margined, the upper base rotundate- 

 cuneate, the lower base abruptly or gradually cuneate and entire; inter- 

 medial leaves erect, adpressed ; of the stem moderately remote, subfalcate- 

 oblong, cuspidate-acuminate, nearly keeled, the cusp V4 as long as the 

 blade, the sides more or less minutely denticulate, the inner base rotundate- 

 cuneate, the outer base much produced with a rounded, very slightly 

 hamate-incurvate auricle, the largest leaves 2 mm. long; of the branchlets 

 much smaller, imbricate, the outer base slightly rotundate-auriculate, 



