80 Stede Additions to the Flora of Washington. 



386. Valerianella radiata (L.) Dufr. 



Great Falls, May 5K), 1999,. Also Potomac flats and Mount Vernon. 

 *324a. Micrampelis lobata (Michx.) Greene. 



Waste ground, July 21 and September 19, 1898. 

 "\5-43''. Campanula rapunculoides L. 



In an old graveyard, Woodley, June IvJ, 1$90; neglected ground, Mas 

 sachusetts Avenue extended, June !'$, 1899. 

 543a. Campanula aparinoides Pursh. 



Tenleytown Junction and Glen Echo Heights, in swales. 

 543. Campanula Americana L. 



On the slope above Canal road, and L think also on Pimmitt Run. 

 *52pa. Lactuca hirsuta Muhl. 



Flats opposite Alexandria: Linnean Hill road, etc. The pubescence 

 in our plant appears to be confined to the stem, except for a few hairs on 

 the midrib of the veins beneath. 

 *525a. Crepis pulchra L. 



This appeared in some quantity in June, 1898 and 1899, on the dump 

 near the propagating grounds. 

 *524. Hieracium Marianum Willd. 



One or two specimens believed to be this were collected in 189(5 in the 

 Avoods on the Virginia shore of the Potomac some distance above Aque 

 duct Bridge. 

 525. Hieracium paniculatum L. 



Woods near one of the runs at Takoma Park, August 11, 1897: hillside 

 east of Zoological Park, August 3, 1897. The specimens of the latter 

 collection were remarkable on account of the relatively stout stem and 

 elongated panicle. 

 *533- Nabalus albus integrifolius (Cass.) Britton. 



Bladensburg, September 0, 1890; Glen Echo Heights, September 3, 

 1899. 

 47Oa. Xanthium strumarium L. 



Plants collected at Rosslyn, September 1I-.J, 1900, come within the de 

 scription of Britton and Brown; and others collected near the canal at 

 the District line September 18, 1890, I would on the whole also refer here. 

 The X. strumarium of Ward's Flora must have been mainly X. Oana- 

 dense. 

 388. Vernonia Noveboracensis (L.) Willd. 



Common in low ground. For the sake of comparison with the next, I 

 note here that this species is frequently of a bushy habit, the stem emit 

 ting straight, slender, ascending branches, bearing the heads clustered 

 at the ends; that the inflorescence is composed of such branches, only 

 shorter, and that when the stem is more strict it still tends to send out 

 some such branches from the axils below the inflorescence proper; that 

 the leaves vary somewhat in width and amount of pubescence beneath, 

 but not surprisingly; that the awns of the involucral bracts are rather 

 flexuous, erect in bud, later usually conspicuously spreading, but rarely 



