4^6 53. DIPtAZlDM. § 2; ANISOGONIIIM. 



Caudex erect, lo 15 c.M. high, densely clothed with narrow, lanceolate 

 scales. Stipes 15 — 60 c.M. long, strong, erect, tufted. Fronds 60 — 180 c.M. 

 long or longer, 2-pinnate, deltoid or broadly lanceolate. Lower pinnae 30 — 

 45 c.M. long, 15—20 c.M. broad. Pinnulae 7—15 c.M. long, I'/j— ^Vi c.M. 

 broad, short-stalked, the point acuminate, the edge crenate to shallowly lobed, 

 the lobes entire or serrate, the base truncate and often auricled on both sides. 

 Texture subcoriaceous ; rachis often pubescent; main veins distinct, copiously 

 pinnate with 6 — 10 veins "On each side in each lobe, which are beginning to 

 unite a short distance from the midrib, the higher ones often free. Sori 

 copious, occupying nearly all the veins, reaching ± the margin. — Lowest 

 pinnae sometimes simple.^^^- ..^ ^^ . 



Trap. Asia 6f Polynesia. 



S4. :A.TH:YI8,IU]M, Jtofh. 



Characters of Diplazium, except that the sori and indusia are oblong, often 

 strongly recurved, sometimes horseshoe-shaped or + reniform and then some- 

 times hardly different from those of Lastraea, the lower of the same group 

 rarely, the higher never double. Fronds at least simply pinnate; veins free. 

 Hk. Bk , Syn. Fil , tab. IV, fig. 38, e; Diels, in Engl. & Prantl, Nat. Pfl. Fam., 

 IS fig. 120. 



a. Fronds simply pinnate. Pinnae entire or slightly lobed, at best ike lower 

 ones pinnatifid. 



$. Rachis winged throughout. (la) A. nanum. 



$.$. Rachis not tvinged, or only winged in the upper half. 

 •{•. Fronds herbaceous, + 7^1^ — 45 c.M. long. 



*. Fronds ± i~2 c.M. broad. (16) A. pusillum. 



ifi.if^. Fronds ± 2—2% c.M. broad. (Ic) A. Toppingianum. 



f .f . Fronds coriaceous, ± 15^50 c.M. long. (2) A. gedeanum. 



a.a. Fronds more copiously 2-pinnatifid lo 3-pinnate. 



b. Pinnae pinnatifid, sometimes pinnate at the base. 

 •f . Lower pinnae not reduced. 



:^. Fronds small, to + 9 c.M. broad. 



X. Indusium reniform. [Za) A. anisopterum. 



(36) A. benguetense. 



