Broadhurst: Struthiopteris in North America 363 



long, yellowish brown, flaccid, loosely appressed, accompanied 

 by small linear or araneous ones; lamina 39 cm. long, 19 cm. wide, 

 ovate-lanceolate, not reduced at the base (type A, without vestigial 

 pinnae), gradually reduced at the apex, the scales smaller on the 

 costae, the under surface finely araneous; pinnae 21 -jugate, 

 narrowly lanceolate to linear-falcate, the apex acuminate, serrate, 

 the base cordate, the lowest pinnae petioled; margins slightly 

 and irregularly revolute and therefore appearing subentire; leaf 

 tissue rigid-herbaceous; veins irregularly raised below, the vein 

 spaces 10—12 to I cm. Sporophyl (not mature) 64 cm. long, includ- 

 ing the stipe ; stipe 26 cm. long, lighter in color, partly yellow-brown, 

 otherwise as in the sterile; lamina 38 cm. long, abruptly or not 

 at all reduced at the base, rather abruptly reduced at the apex; 

 pinnae 21-jugate, 9-1 1 cm. long, 2-3 mm. wide, the base cordate 

 (at least in the lower pinnae), occasionally with spurlike pro- 

 tuberances;* sporangia very dark brown ; indusium delicate, nar- 

 row, deciduous, subentire, irregularly and not fully lacerate. 



12. S. costaricensis (Christ) Broadh. comb. nov. 



Lomaria costaricensis Christ, Bull. Boiss. II. 4: 1092. 1904. 



Blechnum costaricensis C. Chr. Ind. Fil. 152. 1905. 



Plants terrestrial. Sterile fronds 60-80 cm. long; stipes at 

 least 30 cm. long, irregularly angulate, straw-colored, the scales 

 lanceolate, 1.5 cm. long, 4 mm. broad, soft, deciduous, mixed with 

 fibrillose ones; lamina at least 41 cm. long, 28 cm. wide, broadly 

 oblong, the rachis somewhat rugose, otherwise like the stipe ;f the 

 costae soon becoming naked, leaf tissue rigid-herbaceous, brittle 

 and yellowish green when dry; pinnae 20-22-jugate, straight or 

 slightly curved near their apex, acuminate, the lower ones slightly 

 petioled, and subcordate at the base, 11-22 cm. long, 1.6-2 cm. 

 wide, margins finely serrate or subserrate and somewhat revo- 

 lute;! veins indistinctly raised, the vein spaces 16-20 to 1 cm. 

 Sporophyl § indusium smooth, 2 mm. wide, edge entire but wavy, 

 brown-ochre. 



Type: In Christ's herbarium. 



Distribution: Costa Rica and Guatemala. 



Specimens included: Guatemala: Alta Verapaz, Coban, 1350 

 m., von Tiirckheim 1384, 1907 (Y). Alta Verapaz, "In paludosis 

 prope Coban," altitude 4,300 ft., von Tiirckheim 353, 1879 (N). 



. * See footnote under S. violacea, p. 380. 



t But with some whitish, appressed scales in the Guatemalan specimens. 

 J Von Tiirckheim's specimens from Guatemala are irregularly revolute; so is a 

 pinna sent by Christ. Neither specimen is serrate as in S. falciformis; nor so definitely 

 serrate as in any of the species so described in this paper. 

 § According to Christ. 



