86 BIOLOGICAL SOCIETY OF WASHINGTON. 



6zga. Heliotropium Europaeum, L. Heliotrope. 



Georgetown, nenr the Aqueduct Bridge, Mr. M. S. Bebb, 1863. 



The above remarks on Campamtla aparinoides apply equally to 

 this species. 



6401?. Cuscuta compacta, Juss. Dodder. 



Specimen found in the herbarium of the Department of Agriculture, 

 collected near Washington by Dr. Vasey. 



66 1 a. Gratiola aurea, Muhl. 



Specimen in my herbarium (wrongly labeled) collected on the Eastern 

 Branch marsh, in 1873. 



732(7. Scutellaria parvula, Michx. Scullcap. 



This species was simply overlooked in the catalogue. I have specimens 

 collected by Prof. Chickering near the Insane Asylum, May 26» 

 1875- 



738^. Lamium purpureum, L. Dead-Nettle. 



Soldiers' Home grounds. I have fine specimens of this species which 

 I collected in this locality July 20, 1873, but had overlooked in 

 preparing the catalogue. The omission was observed by Mr. 

 Patton, who still found it there in 1882, and I again met with it 

 widely spreading through the grounds on May 20, 1883. 



746^. Plantago pusilla, Nutt. 



Near the southwest corner of the Soldiers' Home grounds (outside), 

 May 20, 1883. 



7730-. Polygonum tenue, Michx. 



Mount Hamilton, Dr. E. Foreman, Sept. 24, 1882. Collected by my- 

 self on both sides of the hill, Oct. I, 1882. 



797a. Euphorbia mercurialina, Michx. 



In a communication dated Dec. 6, 1882, the late Dr. George En^el- 

 mann informed me that this species was. once sent to him labeled 

 Washington, D. C, by Mr. F. Pech, who collected here extensively. 



884a. Zannichellia paiustris, L. 



In the canal, above Foundry Run, June 17, 1883. 



986rt. Eriocaulon septangulare, With. 



Eastern Branch (between tides) above Uniontown, Sept. 10, 1882. 

 Abundant in the Potomac below Analostan Island, and near Custis 

 Spnng. 



