103. SELAGINELLA. A 1 . MONOSTELICAE. a 5 . CAULESCENTES. 137 



subequilateral, rounded on the upper side, truncate on the lower side at 

 the base, copiously ciliated on the upper edge in the lower half, otherwise 

 entire, the largest 2 mm. long and 3 A mm. broad, provided with scattered 

 sclerotic cells ; leaves of the upper plane falcate-ovate, equal-sided, shortly 

 acuminate, entire or sparingly piloso-denticulate, sparingly pellucid-dotted, 

 rounded on the inner side, subcordate-ovate, hardly produced and provided 

 with 1 2 ciliae on the outer side at the base, the largest 1 mm. long 

 and Y mm. broad. 

 Borneo. 



(89) S. caiileseens. Spring, Mon., II, 158; Bk., Fern All., 94, 

 p. p.; AS. circinalis, Pr., Abh. Boehm. Ges., Ill, 583; S. involvens, Hieron. 

 (not Spring), Hedwi., L, 2 ; Lycopodium involvens, Sic., Syn. Fil., 182 ; 

 L. circinale, Thb., Flor. Jap., 341; L. caulescens, Wall, Cat., No. 137; - 

 var. brachypoda, Bk., 1. c., 95; var. bellula, Hieron., 1. c., 4; S. bellula, 

 Ces., Fel. di Bor., 36. 



Shoots erect from a creeping or scandent base, generally 15 45 cm. 

 long or longer, the lower part unbranched, the upper part compound, 

 the stem varying from relatively short to long, terete or nearly so, not 

 angular, with isomorphous, erected, adpressed, spaced, ovate-lanceolate 

 leaves; pinnae close or approximate, deltoid, ovate-lanceolate or linear; 

 pinnulae more or less copiously pinnate with ascending, often contiguous, 

 simple, forked or pinnate tertiary branches; final branchlets 5 35 mm. 

 long, 2Y 2 4 mm. broad including the lateral leaves, those of the most 

 compound forms often the narrowest, and vice-versa, liable to curl up in 

 drought. Leaves of the branches heteromorphous; leaves of the lower plane 

 subcontiguous to imbricated, oblong, 1V 2Va mm. long, rather ascending, 

 bluntish to acuminate, bright-green, firm in texture, rather unequal-sided, 

 spuriously nerved, rounded or cordate at the base, the upper side 

 ciliolate or minutely denticulate at least towards the base, the upper 

 base more or less imbricated over the rachis, the lower side entire, or 

 denticulate to ciliolate or plicated and lacerato-denticulate at the base; 

 leaves of the upper plane V 4 Ys as long, erected, adpressed, entire or 

 denticulate, acuminate or subcuspidate, straight or curved, imbricated, 

 the base more or less truncate or semicordate, produced on the outer 

 side. Spikes square, 540 mm. long, I 1 4 mm. diam.; sporophylla ovate- 

 acuminate, entire or serrulate, keeled; macrospores white, yellow or brown, 

 compressed, lentiform, encircled by an equatorial wing; microspores 



