784 MINNESOTA BOTANICAL STUDIES. 



Phegopteris unideiitata (H. & A.) Mann.- Proc. Am. Acad. 



7:218. 1867. 

 Polypodium unidentatum H. & A. Bot. Beechy, 105. 1832. 

 Collected at an elevation of 4000 feet above Waimea, Kauai, 

 along a stream in the woods. It is an endemic Hawaiian fern, 

 said to grow on all the islands of the group, at elevations of 

 from 2000 to 4000 feet. 

 September 30 (2838). 



POLYPODIUM L. Sp. PI. 1082. 1753. 



Polypodium abietiiium D. C.Eaton, in Mann. Proc. Am. Acad 



7:219. L867. 



On moss covered trees, at 3000 feet elevation, in wet woods, 

 near the bog at the head of the Wahiawa river, Kauai. Hille- 

 braud refers this species to P. tamariscinum, but it is certainly 

 a very distinct species. It is perhaps common in favorable sit- 

 uations, but owing to its small size, and habit of growing on 

 tree limbs among moss, may easily be overlooked. It has 

 been found only on the Hawaiian group. 



August 21 (2732;. 



Polypodium hawaiieuse Underw. n. sp. 



Rootstock wide creeping, clothed when young with dense 

 cinnamon-colored scales; petioles rising at intervals of 2 to 3 

 cm., stout, olive-brown, 7 to 8 cm. long, smooth; leaves dark 

 green, 18 to 20 cm. long, with about 14 pairs of horizontal divis- 

 ions, 3 to 4. 5 cm. long, 1.5 cm. wide, crenate, blunt and rounded 

 at the ends, crowded at the base so that the margins often over- 

 lap, not at all decurrent; veins about four times forked; sori 

 very large, borne on the primary branch of the veins approxi- 

 mate to the midrib. 



This species also belongs to the same group as P. pellucidum 

 and differs from that fern in texture, in the form of the pinnae 

 which are never decurrent, broader, more blunt and approxi- 

 mate; also in the venation and in the position and size of the 

 sori. Mr. Heller informs me that there were no intermediate 

 forms between this species and P. pellucidum, from which it 

 seems to be clearly distinct. 



On trees and stumps in damp woods, on Kauai, at elevations 

 of 3500 to 4000 feet. Collected first on the ridge west of the 

 Hanapepe river, and later on Kaholuamano, above Waimea. 



August to October (2634). 



