Broadhurst: Struthiopteris in North America 383 



pinnae 35-50-jugate, narrowly oblong, the apex abruptly acumi- 

 nate, slightly curved, not serrate, the base cuneate to somewhat 

 rounded, petioled in all the lower ones, 12-15 c m - l° n g» l 3~ I 7 mm - 

 wide; margins entire, not revolute; leaf tissue coriaceous, yellow- 

 ish below when dried; lower surface deciduously araneous with 

 yellowish fibrillose scales, the costae also with fibrillose scales; 

 veins not prominent yet distinct, the vein spaces 18-20 to 1 cm. 

 Sporophyls 143 cm. long; stipes 66 cm. long; lamina abruptly 

 reduced at the base; somewhat reduced at the apex; pinnae 40- 

 50-jugate, 22-26 cm. long, 3-4 mm. wide, curved or twisted, heavy, 

 very much reflexed in drying, the sterile (ventral) surface not 

 visible ; sporangia brownish yellow; indusium delicate, fawn to light 

 tan, quite regularly lacerate to the base, the margin finely fimbriate. 



Type: Werckle i6q, from Costa Rica. 



Distribution: Known from Costa Rica only. 



Specimens included: Several sheets without collection num- 

 ber from Costa Rica collected by Werckle, now in the U. S. 

 National Museum (no. 575241, 575242, and 575243) and in the 

 New York Botanical Garden. 



This species is conspicuously different from any other species, 

 both the sterile and the fertile fronds. Among the several char- 

 acters given in the description the white or hoary, fibrillose scales 

 of the rachis are perhaps the most peculiar, while the long, curved, 

 fertile pinnae, very much lighter in color (sporangia and indusia) 

 than in any other North American species, are the most striking. 



Many foreign species have been incorrectly attributed to North 

 America; e. g., even American writers have included in their local 

 flora Lomaria attenuata Willd., L. procera Spreng., and L. Schom- 

 burgkii Klotzsch. The tonguelike tips and bases of the pinnatifid 

 leaves of attenuata Willd. differentiate it from S. poly podioides with 

 which it has been confused. Under Lomaria procera, Sprengel cites 

 Osmunda procera Forst. The name was first used for a New Zealand 

 species with remote or distant pinnae, which were ovate-oblong in 

 shape. An early picture in Labillardiere gives two forms of pinnae, 

 neither of which resembles S. lineata or S. striata with which it is 

 most commonly confused. A fragment of the type of L. Schom- 

 burgkii has such characteristic pinnae that it should not be made 

 synonymous with any North American species; under it, however, 

 Christensen places the species L. rufa Spreng. and L. Ryani Kaulf . 



There is much need of more material from Central America; 



