114 103. SELAGINELLA. A'. MONOSTELICAE. a*. ASCENDENTES. 



4-angular, the upper part pinnately branched, ovate in outline ; highest 

 pinnae simple or forked; following pinnate, with the pinnulae simple or 

 forked; lower pinnate; lower pinnulae pinnate, central one or more times 

 forked, higher simple; terminal branchlets flagellate and rooting at the 

 apex. Lateral leaves very unequal-sided; those of the stipe probably 

 suberect, obliquely ovate, acuminate, truncate-rotundate on the lower side 

 and broadly rounded on the upper side at the base, very minutely and 

 sparingly denticulate on the lower edge at the base, distinctly so on the 

 upper edge throughout, the largest 4 mm. long and 2 mm. broad, with 

 the midrib gradually clavate at the apex; those of the branches growing 

 gradually smaller, spreading, close, pellucid-margined on the upper side; 

 of the ultimate branchlets hardly IV2 mm. long, Vs mm. broad, unequally 

 cuneate at the base; leaves of the upper plane erect, hardly unequal- 

 sided ; those of the stipe acuminate, pellucid-margined and piloso-denticulate 

 on both sides, subcordate-rotundate at the base and hardly produced on 

 the outer side, the largest S'A mm. long and VU mm. broad; of the 

 branches growing gradually smaller, cuspidate, sparingly pellucid-dotted, 

 keeled in the upper part, otherwise similar to the others; those of the 

 ultimate branchlets narrowed at the base, at best 1 mm. long and 'A mm. 

 broad. Spikes solitary, 5 — 7 mm. long, VI2 mm. diam. ; sporophylla ovate, 

 shortly aristate-acuminate, minutely piloso-denticulate and pellucid-margined 

 on both sides, keeled, those of the posterior side somewhat larger, to 

 I'A mm. long and V4 mm. broad ; macrospores yellowish-white, deciduously 

 verruculose, 1 — 4 in a macrosporangium, the solitary ones the largest, 

 nearly without apical ribs; microspores reddish, provided with short, 

 bacilliform or capitate projections on the basal side. 

 Borneo. 



(61) S. cavernicola, Hieron., Hedwi., LI, 247. 



Shoots ascending from a rooting base, the lower part simple, 1 mm. 

 diam., stramineous-olivaceous, obtusely quadrangular (subterete), angular 

 and grooved when dry, the upper part repeatedly dichotomous, flabellate- 

 rotundate in outline, the branches often flagellate. Lateral leaves of the 

 stipe suberect, very unequal-sided, obliquely subfalcate-ovate, shortly 

 rotundate-cuneate on the lower side, produced, broadly rotundate-subcordate 

 and imbricated over the rachis on the upper side at the base, with the 

 lower edge entire towards the base, very minutely denticulate towards 

 the apex, the upper side piloso-denticulate and narrowly pellucid-margined, 



