Broadhurst: Struthiopteris in North America 361 



10. S. chiriquana Broadh. sp. nov. 



Plants terrestrial. Rhizome (not seen) evidently large, the 

 scales lanceolate, 4-10 mm. long, snuff brown to tobacco brown. 

 Sterile fronds 1. 7-2.1 m. long; stipes 71-86 cm. long, 1-1.6 cm. 

 thick at the base, angulate, reddish brown to purplish brown, the 

 scales lanceolate, 2-6 mm. long, yellowish to purplish brown, pro- 

 jecting noticeably from the stipe and mixed with smaller, finer 

 ones which are more or less appressed; lamina 106-123 cm. long, 

 38-45 cm. wide, oblong, slightly reduced at the base (between 

 type B and C * in the normal frond seen, without vestigial pinnae), 

 the apex gradually reduced, the terminal pinna 6.5-9 cm. long, 

 the lower pinnae more or less opposite; pinnae 44-50-jugate, 

 narrowly lanceolate, straight to slightly curved, the apex serrate, 

 long-acuminate, the base subcordate to cordate, the upper pinnae 

 adnate, the lower pinnae sometimes long-petioled (1 cm.), 19-25 

 cm. long, 2.3-3 cm - wide; margins narrowly revolute;f leaf tissue 

 rigid-herbaceous, the under surface but slightly or not at all 

 araneous, the costae almost naked; veins more or less raised 

 below (not so distinctly as in most specimens of S. striata), the 

 vein spaces 12-15 to 1 cm. Sporophyls 1.6 (in young plant)-2.4 

 m. long; stipes 64-112 cm. long, slightly lighter than the sterile, 

 or yellowish and tinged with reddish brown; lamina 98-124 cm. 

 long, rather gradually reduced at the apex, the base slightly or 

 abruptly reduced; pinnae 49-52-jugate, 15 to 23 cm. long, 3-5 

 mm. wide, the apex with a sterile tip 3-5 mm. long, the base 

 rounded; sporangia yellowish brown; indusium delicate, very early 

 deciduous, and irregularly lacerate. [Plate 26.] 



Type in the U. S. National Herbarium, no. 6761 10 to 6761 14 

 inclusive, collected in humid forests of the upper Caldera water- 

 shed between "Camp I" and the Divide, Holcomb's trail, above 

 El Boquete, Chiriqui; altitude 1650-1925 m., William R. Maxon 

 5650, March 23, 191 1. 



Specimens included: U. S. National Herbarium, no. 675825 

 to 675828 inclusive, collected in humid forests of Cuesta de Las 

 Palmas, southern slope of Cerro de la Horqueta, Chiriqui, alti- 

 tude 1 700-2 1 00 m., Maxon 5442 (partly abnormal), March 18, 

 191 1. 



* Bull. Torrey Club 39: 264. /. /. 10 Jl 19 12. 



t Irregularly revolute in the abnormal plant, Maxon 5442, included in this species. 

 The revolute part is narrow when compared with that in 5. striata, which has pinnae 

 about equal in width. 



