80 Steele— Additions to the Flora of Washington. 



386. Valerianella radiata (T..) Dufr. 



Great Falls. May :!(». li»!)l»,. Also Potomac flats and Mount Vernon. 



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

 Waste g-round. July 21 and September 19, 1898. 



*543^- Campanula rapunculoides I^. 



In an okl graxeyard, Woodley, June 1:5, 18!)(i: neirlected f^round, Mas- 

 sachusetts Avenue extended. June Ki, 1899. 



543a. Campanula aparinoides Puish. 



Tenleytown Junction and (ilen Echo Heights, in swales. 



543. Campanula Americana Tj. 



On the slope al)o\'e Canal road, and 1 thiid< also on Pimmitt Ivun. 



*529r(. Lactuca hirsuta Muhl. 



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

 in our i)lant a))pears to be conhned to llie stem, except for a lew hairs on 

 the midrib of the \eiiis Iteneatli. 



""525'(. Crepis pulchra I.. 



This appeared in some cpiantily in June. 1898 and 1899, on the tUimii 

 near the propagating grounds. 

 "••■524((. tiieracium Marianum Willd. 



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

 woods on the Virginia shore of the Potomac some distance above Aque- 

 duct bridge. 

 525. Hieraclum paniculatum L. 



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

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

 collection were remarkable on account of the relatively stout stem and 

 elongated panicle. 

 *533«. Nabalus albus integrifolius (Cass.) Ihitton. 



Bladensburg, September (i. lS!)(i: Glen Fciio Heights, September <{, 

 1899. 



470U. Xanthium strumarium i.. 



Plants collected at Rosslyn, September Hi, 19(10, come within the de- 

 scription of Ih'itton and l^rown: and others collected near the canal at 

 the District line September 18, 189(), 1 would on the whole also refer here. 

 The A'. xtruiiKiriitin of Ward's Flora must have been maiidy A', ('((lin- 

 den xe. 



388. Vernonia Noveboracensis (!>.) Willd. 



Common in low groiuul. For the sake of comparison with the next, T 

 note here that this species is frecjuently 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 con.spicuously spreading, but rarely 



