Steele Additions to the flora of Washington. 59 



956. Melanthium Virginicum L. 



Formerly in Terra Cotta Swamp; now abundant in the swamps south 

 of Arlington; also north of Berwyn. 

 956. Veratrum viride Ait. 



Magnolia Run, and in a swampy pasture on the Columbia Pike, south 

 part of Arlington. 

 947. Unifolium Canadense (Desf.) Greene. 



Seen abundantly along the banks of a stream in Suitland in 1899 and 

 1900. 



944. Polygonatum commutatum (R. & S.) Uietr. (P. giganteum of 

 Ward's Catalogue.) 



Even mall plants growing on uplands seem to belong to this species 

 rather than to P. biflorurn. 

 934. Smilax glauca Walt. 



In a note under this species Britton and Brown refer to '"a form with 

 numerous small prickles on the lower part of the stem, and more elon 

 gated, sometimes halberd-shaped leaves';, named S. spinulosa by J. E. 

 Smith. I was hereby reminded of a plant I had found at Bennings, and 

 by further observations I learned that the young stems of S. glauca fre 

 quently have the leaves narrowed, commonly to a lanceolate and long- 

 acuminate form, and that, with or without the peculiar leaves, such 

 stems are apt to be prickly. 

 *924a. Narcissus biflorus Curtis. 



Near Kalorama Heights, May 14, 1899. This is a genuine escape, as 

 a good many plants were found scattered about a grassy field. 

 928. Iris cristata Ait. 



Seven Locks and Little Falls on the Virginia side. 

 *928a. Iris Pseudacorus L. 



Has spread from the old fish pond into a tributary ditch. 

 93 ia. Sisyrinchium Atlanticum Bicknell. 



Takoma Park, May 27, 1900; Kenil worth swamp, June 3, 1900. 

 931. Sisyrinchium angustifolium Mill. 



A remarkable display of this plant was seen on a hill on the Conduit 

 road in 1900. Some of the clumps, which were very numerous, must 

 have contained 200 or more culms. The spathes were deep purple. 



901. Habenaria clavellata (Michx.) Spreng. 



A good many specimens were found in a moist place part way up the 

 ascent at Arlington August 11, 1896. Since found in small quantity 

 near the Reform School, at Magnolia Run, and in the woods adjoining 

 the river marsh, Bennings. 



902. Habenaria flava (L.) A. Gray. 



Woods on river marsh, Bennings; a good supply. 



903. Habenaria ciliaris (L.) R. Br. 



Before its discovery in Kenilworth swamp I was told by a resident of 

 Takoma Park that this plant grew near the railroad station there, in the 

 spot where I later found it, 



