311 
stated before. P. longifolia is the same as P. lanceolata levigata 
Gray, but is a good species and should be known by its Nuttallian 
name. P. pumila is cited by Gray as a synonym of P. lanceolata, 
but Nuttall's type specimen in the herbarium of the Philadelphia 
Academy of Sciences, shows that it is the same as 7. lanceolata hirta 
Gray. In the “ New Check List’’* it bears the name P. cinerascens 
(Dunal) Hitchcock,t with the synonym P. Pennsylvanica cinerascens 
Dunal.} This is simply an incorrect identification, as P. mellis 
cinerascens (Dunal) Gray $ does not grow in Kansas. 
In 1831 Nees ab Esenbeck published his revision of PAysalis in 
Linnæa.|| This excellent work seems to have served as the found- 
ation for Gray's revision in the Proc. Am. Acad. 10: 62-68. 
Gray follows Nees closely, but, as far as I can find, does not give 
him credit anywhere. The following new North American species 
are described: P. heterophylla, lanceifolia and Linkiana. P. hetero- 
Phylla and Linkiana have been discussed before. P. lanceifoliaf 
is mainly Mexican, but forms belonging to it come within the 
United States. Specimens collected by Schott and Thomas, and 
referred doubtfully to P. Wrightii by Gray,** belong here. It is 
nearly related to P. Wright and P. angulata, but has much 
smaller flowers. Specimens under the name P. lanceifolia Nees, 
collected by Rügelat the mouth of St. Mark's River, Florida, have 
caused much trouble’ and several new species have been proposed 
for the same. The cause of the confusion can easily beseen. The 
original distribution contains at least three distinct species. The 
specimens preserved in the Engelmann Herbarium represent two, 
one annual, a form of P. lanceifolia Nees, but with narrower leaves, 
and one perennial, a form of P. Virginiana Mill. In the Colum- 
bia College Herbarium it is represented by specimens exactly like 
the € original specimens ot P Pennsylvanica. spathulacfolia Torr. qt tt 
* List of Pteridophyta er Beer, growing without pp in North- 
eastern North America, in Memoirs of the Torrey Botanical Club, Vol, 
navn Spring. Fl. Manh. 32. 1894. 
1 DC. Prod. 13: pt. 1, 435. 1852. 
S Proc, Fun Acad, 10: 66. 1874. 
3 
** Proc. Am. Acad. 10: 63. 1874. 
++ Torr, Bot. Mex. at 163 1859. 
