FLORA OF WASHINGTON AND VICINITY. 87 



Solidago stricta, Ait. 



Terra Cotta Swamp. Middle to end of September. 



Solidago speciosa, Nutt., var. angustata, Gray, 



A very distinct form with much the habit of S. bicolor, but larger, the stem smooth 

 below, as also the ample radical leaves ; flowers yellow and showy. Although Pro- 

 fessor Gray has referred it to the above species, still it bears no resemblance to forms 

 from the West (Arkansas) which have also been so referred by the same authority. 

 It will probably be erected into a species. September, October. 



Solidago Virga-aurea, L., var. humilis, Gray. 



Rocks on the Virginia side of the Potomac, below Chain Bridge. Large, often a 

 meter in height. August, September. 



Solidago rigida, L. 



Woodley Park. A single specimen found, September 22, 1878. 



Solidago elliptica, Ait. 



This species, which has now been found in several places (Reform School, Terra 

 Cotta Swamp, near Bladensburg, &c.), and has been distributed thus far under the 

 name of S. neglecta, Torr. & Gray, has, upon more careful examination, been now 

 referred to S. elliptica, though exhibiting numerous variances from the descriptions 

 given of that plant. September. 



Solidago arguta, Ait. 



The earliest flowering species of our Golden Rods. Middle of July to August. 



t Solidago altissima, L. 



A rough and a smooth form. August. 



Solidago ulmifolia, Muhl. Elm-leaved Golden Rod. 

 August, September. 



Solidago odora, Ait. Sweet Golden Rod. 

 Late in July and through August. 



Solidago nemoralis, Ait. 



Middle of August to October. 



Solidago rupestris, Raf. 



Virginia shore of Potomac, below Little Falls. August 1 to middle of September. 



Solidago Canadensis, L. 



September, October. 



Solidago gigantea, Ait. 



Virginia shore of Potomac, below Little Falls ; also near Bladensburg. Septem- 

 ber to middle of October. 



t Solidago lanceolata, L. 



Late in September or in October. 



t Sericocarpus solidagineus, Nees. White-topped Aster. 

 Middle to end of June. 



i Sericocarpus conyzoides, Nees. 

 Last of Jime or first of July. 



