﻿45rt. PTERIS. § 3, LITOBROGHIA. . 375 



into linear-oblong, falcate lobes 1 — 2 c.M. long, ± 5 m.M. broad, lowest pinnae 

 15 — 25 c.M. long, ^'/j — 4 c.M. broad, with a single, similar, but smaller 

 pinnula at the base on the lower side. Texture herbaceous ; rachis and surfaces 

 naked; veins anastomosing copiously. Sori not reaching the subentire apices. — 

 The form found in Batjan has the veins only slightly anastomosing. 

 Batjan; Polynesia, Trop. Australia. 



*,(44) Pt. tripartia, Sw., HL, Spec. Fil., 11, 225 (excl. /3 & y); 

 Pi. marginala, Bory, Kac, Flor. Btz., I, 158; Litohroclna marginala, Pr., Bedd., 

 Ilandb. Ind. Ferns, 122; L. iriparlita, Pr., Bedd., Ferns S.I., tab. CCXX. 



Stipes 30 — 150 c.M. long, strong, erect, naked, polished, stramineous or 

 brownish. Fronds deltoid, ± 50 — 150 c.M. each way. Central branch with 

 a terminal pinnula 7 — 25 c.M. long, 8 — 25 m.M. broad, cut down nearly to 

 the costa into numerous closely placed, linear, straight or falcale, spreading 

 or erecto-patent lobes on each side, which are entire or slightly toothed when bar- 

 ren: below Ibis many closely placed, similar lateral pinnulae on each side. Lateral 

 branches similar to the central one, but a little smaller, unbranched or branched 

 again at the base on the lower side. Texture commonly herbaceous; rachises 

 and surfaces naked: veins fine, anastomosing principally in arches against the 

 midribs and costulae. Sori falling rather short of the apex of the segments. 



Paleotropical. 



Species of an indefinite systematical place. 



(45) l»t. merteiisioides, wnid.. Spec, V, 394. 



Fronds 60 c.M. or more long, 2-pinnate. Lowest pinnae 15 — 17^2 c.M. 

 long, highest 7^/, c.M. long. Pinnulae linear-lanceolate, sessile, subacute, 

 entire, subconfluent, 1 — 1 '/j c.M. long. Texture thinly membranaceous. Sori 

 narrow. — Pinnae resembling the leafy branches of Mertensia. 



Java, Borneo, Amboyna. 



4.5b, HEM:IF»TEK,1S, Rosenstock. 



Like Pteris, but the sori occupying only the posterior edge of the ulti- 

 mate segments, the anterior side destitute of sori. Fed., Rep., V, 38, 

 Papuan. 



