103. SELAGINELLA. A 1 . MONOSTELICAE. a 4 . ASCENDENTES. 107 



subcompressed or obtusely angular, 3 5 mm. thick, the upper part 

 decompound, branched, suborbicular, broadly oblong or ovate in outline, 

 30 40 cm. long, pinnate downward, copiously dichotomous upward r the 

 main rachis flexuose at least in the upper half; pinnae cuneate-obovate 

 or lanceolate-oblong, pinnate at the base, more or less copiously dichotomous 

 in the upper part, as are the pinnulae, with the rachises flexuose; 

 ultimate branchlets numerous, crowded, 6 16 mm. broad including the 

 lateral leaves. Leaves heteromorphous; of the stipe erect, adpressed; of the 

 lower plane rather triangular, acute, ciliate at the base, the inner base 

 whether or not subproduced ; of the upper plane oblong-ovate, acuminate, 

 the base ciliate, semicordate or cordate, the outer base produced ; leaves 

 of the branched portion crowded; of the lower plane spreading; of the 

 main rachis the largest, linear-falcate, to 10 mm. long, 3 mm. broad near 

 the base, acute, the upper side entire, pellucid-margined, ciliolate towards 

 the rounded base, the lower side entire, provided with 2 ciliae at the 

 rotundate-truncate base; of the ultimate branchlets similar but rather 

 equal-sided, 4 J /2 9 mm. long, 1 2 mm. broad, nearly equally rounded 

 at the base; leaves of the upper plane erect, adpressed, imbricated, 

 oblong or obovate; of the main rachis to 5 mm. long, long-cuspidate- 

 acuminate, entire or obsoletely denticulate on both sides, eiliolate or 

 ciliate, and obliquely cordate at the base, the outer base slightly hamato- 

 incurvate; of the branches growing gradually shorter, with the cusp 

 Vs 1 2 as long as the blade, the edge entire or obsoletely denticulate, the 

 base more or less ciliolate or ciliate, rounded on the inner side, produced 

 and cordate on the outer side. Spikes 1 4 cm. long, 1 3 mm. diam., 

 solitary or 2 4-nate, straight, curved or flexuose; sporophylla isomorphous, 

 ascending, at length spreading, imbricate, triangular-ovate, keeled, acute, 

 very minutely denticulate, the largest 2 mm. long; macrospores yellowish- 

 white, rugulose, the rumples short or elongate, straight or flexuose, simple 

 or branched, free or reticulate-connate, the apical ribs encircled by a 

 ring-shaped crest; microspores yellow or pale-orange, provided with 

 bacilliform or stipitate-capitate projections. 



Forma angustior: Ultimate branchlets short, to 4 cm. long, 6 10 

 mm. broad; spikes terminal. 



Forma latior (typica): Ultimate branchlets elongated, 4 8 cm. long, 

 10 16 mm. broad; spikes partly terminal, partly in the axils of the 

 higher branches, and then often once or twice forked at the base. 



Borneo. 



