460 Eaton : Pteridophytes observed in Florida 



Several patches were seen about the base of an Indian mound at 

 Fort Lauderdale. The mound had been made on a level, damp, 

 sandy place, a short distance from the river, and the plants were 

 growing at the border of the saw palmetto growth. The roots 

 are quite long and proliferous, sometimes with 2 or 3 young 

 plants, and the colonies appear to have been formed by this 

 method. One of my specimens shows the sterile leaf with three 

 sori on each margin. This is the only instance of the kind I 

 have observed in the genus, though partial reversion of the spike 

 is not very rare. 



HYMENOPHYLLACEAE 



Trichomanes Krausii Hook. & Grev.* 



Rootstocks matted, extensively creeping, slender, densely 

 covered with short bristly root-hairs; stipes scattered, 3-10 mm. 

 long, bristly radiculose below, often narrowly winged by the de- 

 current frond above ; fronds broadly oblong to linear-oblong, 

 1.5—2 cm. long, 5-12 mm. wide, thinly membranaceous, pinnatifid 

 nearly to the rachis, with a broad, usually angular, often closed 

 sinus ; pinnae linear and toothed to oblanceolate and pinnatisect, 

 the segments rounded, each sinus bearing a single, black stellate- 

 bristled tubercle; sori 3-13, partially immersed, the borders 

 winged, the lobes rounded, free, spreading ; column included or 

 short-exserted ; veins pinnate, one to each lobe, and occasionally 

 a few short, spurious ones, especially as faint, broken, intra- 

 marginal nerves. 



On roots, logs and bases of trees, often completely covering 



them, in humid hammocks. Border of the everglades at Camp 



Lonsrview ; Costello's hammock. 



Trichomanes sphenoides Kunze • 



Rootstocks matted, slender, bristly radiculose ; stipes none to 

 2 cm. long, bristly rad'culose below, often winged above ; fronds 

 O.5-1.5 cm. long, 2-io mm. broad, those of outlying new root- 

 stocks cordate-orbicular and sessile, those of dense tufts passing 

 through fan-shaped to oblanceolate, and linear-oblanceolate, irregu- 

 larly lobed, incised, or parted, the margins with stellate reflexed 

 hairs when young; indusia 1-1 1, included or mostly free, some- 

 times stipitate ; veins dichotomous throughout or pinnate above. 



In lime-sinks and rarely on tree-trunks in hammocks in pine 

 woods, Costello's, Ross's, Colwell's and Bauer's ; also in a ham- 

 mock near the road, near Camp Longview. 



