374 Broadhurst: Struthiopteris in North America 



veins slightly grooved above, appearing below as distinct, fine 

 lines slightly but not definitely raised, the vein spaces 10-13 to 

 1 cm., the vein apices often marked by delicate, irregular, decidu- 

 ous, scalelike growths. Sporophyls at least 100 cm. long ; stipe over 

 22 cm. long (complete stipe not seen); lamina 80 cm. long; pinnae 

 about 60-jugate, 12-15 cm. long, 3-4 mm. wide, the apex with a 

 sterile tip 2-4 mm. long, the base distinctly cordate and petioled, the 

 petioles bearing throughout glandular swellings at the upper side 

 where they join the rachis;* sporangia dark brown; indusium not 

 very heavy, irregularly but quite fully lacerate, apparently quite 

 persistent. 



Cotype in the U. S. National Museum, no. 472015, 472016, 

 collected "Sommet du Volcan de Poas," 2,644 m -> Costa Rica, 

 Tonduz 107 10, November 1896. 



If not distinct, this could well be considered a mainland form of 

 .S. lineata. It differs as indicated in the key, and also in having 

 many more pinnae. The only island specimens of S. lineata having 

 more than 40 pinnae are the peculiar ones from Santo Domingo 

 which were mentioned under S. lineata as quite different from the 

 rest of that species; they, however, do not resemble this plant 

 collected by Tonduz, as they are much heavier in texture and 

 have much narrower laminae. 



19. S. Shaferi Broadh. sp. nov. 



Plants terrestrial. Rhizome evidently large, the scales 1.5-2 

 cm. long, tufted, rigidly erect, linear, broader at the base, often 

 abruptly so, yellowish brown with a definite dark brown center. 

 Sterile fronds 32-42 cm. long; stipes 3-10 cm. long, smooth to 

 somewhat angulate, straw-colored to brownish, the scales much as 

 on the rhizome, shorter, loosely arranged or disappearing with 

 age; lamina 16-35 cm - l° n g> 14-18 cm. wide, oblong or broadly 

 elliptical (young oblanceolate), abruptly reduced at the base 

 (type D, without vestigial pinnae), usually not reduced at the 

 apex, the terminal pinna 7-1 1 cm. long, the rachis with much 

 smaller scales or naked; pinnae 10-15-jugate, narrowly oblong to 

 almost linear, straight to somewhat falcate, ascending, 8-1 1 cm. 

 long, 10-15 mm - wide (through the dilation or auricle), the apex 

 acuminate, entire, the base broadly dilated and fully adnate to the 

 rachis in the upper pinnae, in the lower ones narrowed suddenly 

 below the expansion or auricle on the lower side of the pinna and 



* Each petiole has therefore a peculiar shouldered appearance; a few of the lower 

 sterile pinnae have the same glandular expansion of the petiole. 



