Steeie Additions to the Flora of Washington. 69 



vicinity of Manassas, and may therefore be looked for on our southern 

 border as well as in the up-river region, where, as reported by Ward, our 

 only specimen has been found. 

 163. Euonymus Americanus L. 



Common. I enter this name in order to note that the E. Americanus 

 obovatus of Ward's Flora is doubtless a mistake, as the true obovatus is 

 very distinct, and its occurrence here, so far as I know, has not been 

 confirmed. 

 *i76a. Acer pseudo-platanus L. 



Spontaneous along New-cut road in the hollow above Georgetown Col 

 lege grounds; leaves collected November 11, 1900. 

 174. Acer saccharum Marsh. (.4. saccharinum of Ward's Catalogue.) 



A tree of some size, but partially blown over was seen in a ravine at 

 Widewater; also a grown tree in a similar condition on Plummer's 

 Island. Many seedlings were scattered about the last named locality. 

 *i78a. Cardiospermum Halicacabum L. 



Dumping ground, Eckington, July 28, 1898. Also later at different 

 places on the Potomac flats. 

 155. Impatiens biflora Walt. (I. f idea of Ward's Catalogue.) 



Many specimens with pinkish and mottled flowers were found growing 

 with the ordinary form on boggy ground at Bennings, September 1, 1899. 

 172. Vitis rupestris Scheele. (]'. rulpina of Ward's Catalogue.) 



Near Great Falls and Chain Bridge. 

 I38a. Sida hermaphrodita (L.) Rusby. (Sifla Napaea Cav.) 



Potomac flats, both sides of the railroad and near the old fish pond, 

 July 27, 189(5, and later. 

 I42a. Hibiscus Syriacus L. 



Escaped on the grounds of the old observatory (July 6, 1898), and 

 probably elsewhere. 

 I42r Hibiscus Trionum L. 



Propagates itself in my yard, where it was planted several years ago. 

 *i42r. Gossypium herbaceum L. 



Waste ground, Potomac fiats, October 2.~>, 1900; several plants with 

 flowers and ripe bolls. 

 129^. Hypericum densiflorum Pursh. 



A few good plants in the bog one mile north of Berwyn, July 28, 1900. 

 The bushes were about five feet high. 

 i33. Hypericum majus (A. Gray) Britton. 



Howard Hill reservoir. August 20, 189(5. 



80. Helianthemum Canadense (L.) Michx. 



Kenil worth, Suit-land, and near Takoma Park. I do not find the 

 species easy to distinguish when in fruit, but the Takoma specimens, 

 the only ones seen in flower, belonged to H. Canadense. 



81. Lechea minor L. 



I have failed to find this plant anywhere except at Lakeland, where I 



