10. LYGODIUM. § 1. EULYGODIUM. 115 



(1) li. seiuihastatuni, neav., Hk. Bk., Syn. FiL, 437; L. flexu- 

 osum, Sio.^ C. Chr., Ind. FiL, p.p. ; Hydroglossum auriculatum, Willd. 

 Spec, V, 84; Ugena semihastata., CaiK, Icon. Descr. PL, VI, 74, tab. 

 594, fig. 1. 



Primary petioles short or obsolete, secondary to about 2'/-^ cm. long. 

 Fertile pinnae petiolulate, geminate. Pinnulae shortly petiolulate, simple 

 or forked, or geminate again. Final segments lanceolate or ligulate, to 

 about 20 cm. long and 2'/j cm. broad, serrulate-crenulate, cordate- 

 auriculate on the outer side (or on both sides) at the base, the auricles 

 rounded or more commonly conspicuously arcuate-decurvate. Spikes in 

 close rows along the edge, to about '/, cm. long; spores verruculose. — 

 The sterile pinnae are described as palmate or 2-partito-palmate. — See 

 my information under L. dimorphum C'opeZ. 



Philippine and Marianne Isles. 



(2) Ij. Teysmanuii, v. A. v. JR. 



Pinnae irregularly forked (as described), geminate or sparingly 

 (sub-)pinnate with 1 pinnula on each side below the terminal one; 

 pinnulae once or twice forked, the lateral ones alternate, the lowest 

 (posterior) + horizontal; ultimate segments free or connected, truncate- 

 cuneate or subcordate on the outer side (the free ones cuneate on the 

 inner side) at the base. 



(3) li. circinatum, Sw.s Ugena dichotoma S macrostachya, Cav., 

 Icon. Descr. PL, VI, 74-75, tab. 594, fig. 2—3. 



Adult plants with the ultimate fertile segments not rarely free and 

 incised at the base, with the lower spikes arranged in groups of 2 — 6 

 on the lobules, as in L. trifurcatum Bk., but the spores not coarsely 

 verrucose. 



Var. monstruosum: Omit this, it is an abnormal form of the 

 type only. (Forma monstruosa). 



{3a) tu. borneense, ». Ji. ». n., in Bull. Btz., 1915, XX, 29. 



Primary petioles short or obsolete, secondary ones '/i — 1 '/j cm. long, 

 margined, provided with deciduous, short hairs. Pinnae geminate. 

 Leaflets simple, uniform, or the fertile ones somewhat contracted, long- 

 elUptical, acuminate, serrulate-crenulate, cuneate at the base, petiolulate, 



