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and the spinulose ferns, which all grow here within a small area. 

 Five clumps oi Dryopteris cristata x marginalis Davenp., as well as 

 a number of more common ferns have also been found on this area.* 

 The swamp is moderately wet, not densely shaded but open 

 enough to support a good undergrowth of grasses and other her- 

 baceous plants besides the spicebush and other small shrubs. 

 This was the only locality known on Staten Island for Boott's 

 fern, until 1905, when I spent the summer on the island and 

 found this fern at other stations. One of these is a little 

 pond near Bradley Avenue, where I found, July 3, a colony of 

 four plants, one of them several feet from the rest, growing on 

 the grassy border of the pond. This is a sparsely shaded border 

 covered with grass and other small undergrowth with a few plants 

 of Dryopteris cristata (L.) A. Gray and one plant of Dryopteris 

 spimilosa (Retz.) Kuntze. In the next locality in which the fern 

 was found, on August 2, 1905, there were several plants of D. 

 Boottii with D. cristata and D. spimilosa growing on grassy tus- 

 socks or at the bases of willows in a small swamp that has stand- 

 ing water most of the year. This swamp is below Ocean Terrace, 

 west of Dongan Hills. On the following day (August 3) I 

 found the fern at Bull's Head in the more open part of a large 

 grassy swamp in which there is quite an abundant growth of D. 

 spimilosa with an occasional Dryopteris spimilosa intermedia 

 (Muhl.) Underw. and several plants of D. cristata. Three clumps 

 of D. Boottii were found at this station growing several feet apart. 

 Two weeks later (August 17) several plants of the fern were 

 found growing on both sides of Ketchum's Mill Pond Brook, 

 west of Richmond. In the swampy places along this brook D. 

 spimilosa is abundant, and the subspecies intermedia is frequent. 

 Dryopteris Clijitoniana (D. C. Eaton) t and D. cristata also grow 

 here, the latter comparatively abundant. This swamp is more 

 shady than the others mentioned and thus less grassy, portions 

 of it are more densely covered with underbrush, and it is moder- 

 ately wet. Here I have counted at one time as many as eighteen 

 plants of D. Boottii scattered through the swamp. In the first 



*See Proceedings S. I. Assoc, i : 66. 1906. 

 t See Proceedings S. I. Assoc, i : 64. 1906. 



