FLORA OF WASHINGTON AND VICINITY. 101 



t Physalis viscosa, L. 

 June. 



i Nicandra. 2)lnjsaloides, Gaertu. ApPLE-OF-PERr. 



Georgetown (Professor CMckering). 

 Lycium vulgare, Duval. Matrimony- Vine. 



Canal in Georgetown ; also, Bladensburg. End of May to November. 



tDatura Stramonium, L. Common Stramonium. Jamestown-Weed ("Jimsos?- 

 Weed"). Thorn- Apple. 

 July to September. 



Datura Tatula, L. Purple Thorn-Apple. 



More abundant tban the last and larger. July to September. 



SCROPHULARIACEiB. 



FiGwoRT Family. 



tVerbascum Thapsus, L. Common Mullein. 

 July or August. 



tVerbascum -CZaMana, L. Moth-Mullein. 

 June, July. 



tLinaria Canadensis, Dumont. Wild Toad-Flax. 



In fields, not veiy common. Middle of May. 

 tLinaria vulgaris, Mill. Toad-Flax. Butter- and-Eggs. Eamsted. 



May, June. Autumnal flowers observed November 1, 18S1. 



tLinaria EJatine, Mill. 



National Deaf Mute College Grounds (Professor Chickering). » 



tScrophularia nodosa, L. Figwort. 

 Not common. August. 



t Chelone glabra, L. Turtle-head. Snake-head. Balmony. 



August, September. 



tPentstemon pubescens, Solander. Beard-tongue. 

 High Island; Great Falls. Middle to end of May. 



tPentstemon laevigatus, Solander. [P. Digitalis, Nutt.] 

 May. 



tMimulus ringens, L. Monkey-flower. 



July. 



t Mimulus alatus, Solander. Winged Monkey-flower. 



July, August. 



Herpestis nigrescens, Benth. 



Flats below Eads' Mill, July 18, 1880, in flower ; also in the same place, Septem- 

 ber 12, 1880, in both flower and fruit ; rare. Could not be found this year (1881). 



+ Gratiola Virginiana, L. Hedge-Hyssop. 

 May. 



