﻿606. DICTYOPTERIS. § 1. ARCYPTERIS. S21 



Vap. eu-irregulariis : Fronds simply pinnate; sori small and very 

 numerous. 



Malaya; — var. eu-irregularis : Philippines. 



$ ± DIGRAMMARIA. 



(19) D. ambigua, ». A. ». R.^ Digrammaria ambigua, Pr., Tent. 

 Pterid., 117, tab. IV, fig. 12; Phegopteris philippinensis, Melt., var. i, Mett., 

 Parng., IV, Phegop. & Aspid., 27; Stenosemia aurita, J. Sm. (not Pr.), Ban. 

 & Hk., Gen. Fil., tab. XCIV, fig. 1 — 4; Aspidium ambiguum, Diels, CopeL, 

 Polypod. Philipp , 39; C. Chr., Ind. Pil. ; Teclaria ambigua, CopeL, Philipp. 

 Journ., II, 415, p. p.; Gymnogramme ambigua, Hk, Hk., Bk., Syn. Fil., 378. 



Stipes slender, nearly naked. Fronds 45 — 60 c.M. long, + 30 c.M. broad, 

 oblong-deltoid, 2-pinnatifid. Pinnae lanceolate, 2'/^ — 4 c.M. broad, the lower 

 ones slightly stalked, cut V2'"^^y down to the costa or more into linear-oblong 

 lobes, the fertile lobes contracted. Texture thinly herbaceous; colour dark- 

 green; rachis and both surfaces thinly clothed with long, jointed hairs; veins 

 of the lobes often forked, the lower ones forming costal areolae. Sori oblong, 

 simple, or confluent when the veins fork. 



Philippines. 



61. r>IE»TEI8,IS, Reinwardt. 



Sori punctiform or round, on the back of united veinlets. Indusium 

 wanting. 



Rhizome creeping. Stipes scattered, not articulate to the rhizome. Fronds 

 flabellato-dichotomous, i.e. divided nearly or quite to the base in 2 halfs, each 

 half once or more times dichotomously divided again with radiating lobes. 

 Primary ribs radiating, dichotomous; secondary ribs (if present) ± parallel to 

 the primary ones; veins anastomosing copiously. Diels, in Engl, k Prant. 

 Nat. Pfl.Fam., I*, fig. 108. 



Tropical Asia and Polynesia. 



m. Sori in i row on each side of the costae. (1) D. Lobbiana, 



a.a. Sori scattered irregularly. 



