12 Steele — Addition.^ t<i the Flora of Wusjdngion. 



307. Rotala ramosior (L.) Koohne. (Atimninuid JnimiUs of AVard's 

 (Catalogue ) 

 This plant is common in very wet i)laces alonu' tlie river (Chautaiuiua. 

 Jackson Cit}', Huntiii"- Creek, Henniniis). Instead of tlie 2 to (5 inches 

 of the lUustrated Flora it grows with us from (i to 12 inches high, and a 

 similar stature is shown by some specimens in the National Herbarium. 

 It branches freely when there is space, but when crowded the stem tends 

 to be simple. Alternate with the acute di\ isioiis of the calyx at its four 

 corners are broad appendages which fold inward o\er the ovary. The 

 flowers do not seem to be "very small". 



310. Decodon verticillatus (L.) Ell. 



In the swamp about the mouth of Oxen Run. August IS. 1900. then 

 coming into bloom: a small number of specimens. 



*3iia. Chamaenerion angustifolium (L.) Scop. 



I saw a plant of this species at Takoma Park in 1890 or 1897. 



311. Epilobium coloratum Alnhl. 



The form vmbrom Haussk. was collected at Bethesda. September 9, 

 1899. The leaves are very large. 



318a. Kneiffia longipedicellata Small. 



Near Bladensburg, June 27. 189<). Not i-iro in the eastern \rAV\ of our 

 territory. It grows in open ground: when well developed it is a very 

 fine plant, far more handsome than K. frufiro^u. 



350. Aralia racemosa L. 



Found by me only on Pimmilt's Run, where there were a good many 

 fruiting specimens on August 19, 1900. 

 *352«. Hedera Helix Tj. 



A patch of the common ivy Avas seen in the woods below Congrees 

 Heights in 1897 or 1898. 



348a. Caucalis Anthriscus (L.) lluds. 



Of late years this plant has spread extensively on the Potomac (lals. 

 aiul should it reach cultivat(Ml grounds it might proxe troublesome. 

 "329a. Eryngium planum L. 



There were several specimens on the Massachusetts a\enue terrace in 

 the summer of 1899, and also in 1900. 

 331. Sanicula Marylandica Jv. 



Near ("hevy Chase, at (ilencarlyn, and in a ra\ine at (ilen Echo. 

 3300. Sanicula gregaria liicknell. 



Feeder Dam Island, May L"), 189(): later along the river on the Virginia 

 side above Aqueduct Bridge, at Cabin .lohn bridge, and in a shady \ailey 

 beyond ClevelanJ Park, June 2, 1898. at which lime 1 became ac(|uaiiited 

 with BicknelTs description. 



"3386. Foeniculum Foeniculum (L.) Karst. 



Seen once on the C'anal road and once on the Potomac flats dumping 

 ground. It does not establish itself here. 



'"339a. Chaerophyllum bulbosum E. 



West of the fish jjond, with tlowers and fruil June 27, 1899: bulbs were 



