Eaton: Pteridophytes observed in Florida 479 



One plant only, collected February 1905, in a hole in the lime- 

 stone six inches across and about 2 ft. deep, in a clearing in Ross's 

 hammock. It is now thriving in a greenhouse at North Easton. 

 It had but 4 fronds when found. It was in a tangle of D. patens, 

 and was noticed because of its brighter green color and more 

 graceful carriage. 



Dryopteris Thelypteris (L.) Gray 



Common in low mucky swamps where the water is fresh, on 

 both coasts. On the side of the prairie between the pine woods 

 and mangroves at Black Point I collected plants II. 5 dm. long. 

 Florida specimens have a slightly different aspect from those of 

 the north, the pinnae being proportionately shorter and the basal 

 pair of pinnules 1/3 longer than the next pair, and serrate or 



undulate. 



Dryopteris unita glabra (Mett.) Underw. 



In the low hammocks of the everglades where inundated most 

 of the year; also in the tangled shrubbery along the Miami. My 

 largest frond is over 21 dm. long and 4.5 dm. wide. It has the 

 appearance of a large, glossy D. Thelypteris. The rootstocks 

 sometimes grow out over the surface of the ground for a distance 

 of a meter or more. They are slightly scaly, dichotomously fork- 

 ing, slightly flattened dorsi-ventrally, green at tip but soon glossy 

 black. I did not observe this species on the west coast. . 



Tectaria Amesiana sp. nov. 



Rootstocks short, creeping, the dead portion covered with 

 terete stipe- bases, otherwise naked, the living portion clothed with 

 lance-acuminate, brown scales; stipes 5-10, clustered, 1-3 dm. 

 long, slender, flat above, slightly rounded below, light-castaneous, 

 sparsely beset with deciduous lance -acuminate, brown scales, very 

 finely puberulent-scaly at base and on upper surface; fronds 10- 

 16 cm. long, 3-6 cm. wide, with 1 or 2 pairs of pinnae and a 

 large terminal one ; rachis and principal veins puberulent, espe- 

 cially above ; lower pinnae distant, petioled, more or less cordate, 

 obliquely triangular-ovate, with about three coarse rounded lobes 

 on each side, those of lower side largest, the segments and ter- 

 minal portion sinuate or undulate ; second pair of pinnae (when 

 present) oblong-lanceolate, obtuse, adnate to rachis, coarsely 



