48 Steele Additions to the Flora, of Washington. 



cums I have of late left wholly to the skill and kindness of Mr. 

 E. D. Merrill, who is working with Professor Scribner in that 

 trying field. Professor C. F. Wheeler has been referee for 

 about all of the Carices that presented difficulties, and I am also 

 the beneficiary of Mr. Geo. B. Sudworth, Mr. Frederick V. 

 Coville, Mr. J. N. Rose, Mr. Charles L. Pollard, and others. 



The arrangement of the list follows the sequence of Engler 

 and Prantl, but the numbers prefixed are those of Professor 

 Ward's Guide to the Flora of Washington and Vicinity (Bull. 

 U. S. Xat. Mus. Xo. 22, 1881) and the subsequently published 

 additions. In order to preserve, the original numeration, and 

 at the same time place the additions in their proper connections, 

 the use of appended letters has been resorted to. 



The prefixed asterisk denotes a species not hitherto recorded 

 in print as belonging to our flora. In the case of a number of 

 these species my collection has probably been anticipated by 

 that of other collectors whose results have not been published, 

 but it is not practicable wholly to avoid this injustice. On the 

 other hand, some first collected by me have in the same manner 

 been entered in an earlier list. 



*I2I7. Pteris aquilina pseudocaudata Chile. (P. aquilina caudata 

 of American authors, not of Linnaeus). 



Kenilworth, abundant near the railroad, September 20, 1900. Also 

 near Hyattsville. 

 i233a. Dryopteris spinulosa (Retx) Kuntxe. 



In a ditch near Captain Jones' place beyond Chevy Chase Lake. 

 1234. Dryopteris spinulosa intermedia (Muhl.) Und. 



Not seen near the city. Found at Suitland, near Kensington, and near 

 Great Falls on the Virginia side. 

 1237^. Onoclea struthiopteris (L.) Hoffm. 



A few sterile fronds, Plummer's Island, May 31, 1897. 

 1240. Lygodium pal mat um (Bernh.) Sw. 



In a drained swamp, eastern part of Suitland, Sept. 8, 1899. 

 *i2i3a. Equisetum robustum A. Br. 



On both sides of Beaver Dam Branch, near the road. Rarely found in 

 fruit. 

 *i253r\ Isoetes saccharata Engelm. 



In tide mud among coarse gravel along the bay at the mouth of Four 

 Mile Run, August 5, 1898. The range as given in Britton and Brown's 

 Flora is "Wicomico and Nanticoke rivers, eastern Maryland". The 

 following varieties, though not of my own collecting, may be appro 

 priately published in this place. 



