103. SELAGINELLA. A». PLEIOSTELICAE. 213 



down quite to the base or the lower part simple or provided with reduced 

 branches, the stem 8-stelical, -stramineous, grooved down the face or sides 

 when dry, 2 — 3 mm. thick, the upper part pinnate or forked and pinnate ; 

 pinnae lanceolate in outline, 10 — lYVz cm. long, to 4 cm. broad; pinnulae 

 approximate or crowded, erecto-patent, simple or once to twice forked; 

 branchlets 4 — 6 mm. broad including the lateral leaves. Leaves hetero- 

 morphous, thin; leaves of the stem erect or erecto-patent; of the lower 

 plane often straight, equal-sided, linear-oblong, blunt or rounded at the apex, 

 entire, more or less narrowly pellucid-margined, unequally 2-auriculate- 

 cordate at the base with the auricles hamate-incurvate, the largest leaves 

 5 — 6 mm. long and 2 mm. broad ; of the upper plane subparallel, elongate- 

 triangular or lanceolate-oblong, straight or subfalcate, acute or sub- 

 acuminate, entire, pellucid-margined, 2-auriculate-cordate at the base with 

 the auricles hamate-incurvate, the largest leaves 4 — 5 mm. long and 

 VU — 2 mm. broad; leaves of the branches very heteromorphous ; leaves 

 of the lower plane somewhat remote and subhorizontal on the secondary 

 rachises, crowded and suberecto-patent on the branchlets ; of the secondary 

 rachises subfalcate-oblong, unequal-sided, blunt, entire, distinctly pellucid- 

 margined on the upper side, narrowly so on the lower side, the upper base 

 broadly rounded and auriculate-cordate, the lower base narrowly auriculate- 

 cordate, the largest leaves 4'-2 mm. long and 2V2 mm. broad; of the 

 branchlets similar but smaller, nearly equal-sided, not auriculate at the 

 base, the upper base rounded or rotundate-cuneate, the lower base truncate- 

 subcordate, the largest leaves S'A mm. long and I'A mm. broad; leaves 

 of the upper plane erect; of the secondary rachises lanceolate-oblong, 

 subfalcate, the lowest nearly similar to those of the main rachis but 

 smaller, 3 mm. long, pellucid-margined, with the basal auricles hardly 

 hamate-incurvate, the higher still smaller, more acuminate, rotundate- 

 cuneate and whether or not minutely cordate at the base; of the branch- 

 lets similar to the higher ones of the secondary rachises, rather long- 

 acuminate.- Spikes solitary, square, I—V/2 mm. diam. ; sporophylla 

 elongate-ovate, acuminate, entire, narrowly pellucid-margined, slightly 

 keeled, the largest I'A mm. long; macrospores white, or black and 

 white-pruinose, densely and more or less deciduously verruculose; micro- 

 spores whitish or pale-orange, provided with crowded, more or less 

 irregular, free or connected, verruciform or shortly clavate projections on 

 the basal side. 

 Sumatra. 



