FLORA OF WASHINGTON AND VICINITY. 81 



t Jussiaea decurrens, DC. 



Hunting Creek; Custis Spring. Middle of August to end of September. 



tLudTvigia alternifolia, L. False Loosestrife. 

 Last of August. 



tLud'wigia hirtella, Raf. 



Holmead Swamp ; rare. Middle of July to August. 



tLudwigia palustris, Ell. Water Purslane. 



Early in July. Large floating leaves form in running water in October, and 

 submersed plants in still water in early spring. 



tCEnothera biennis, L. Evening Primrose. 

 September or October. 



tCEnothera siuuata, L. 



Railroad, near Benning's Station (Dr. Vasey, 1878). 



t CBnothera fruticosa, L. Sundrops. 

 June. 



OSnothera fruticosa, L., var. linearis, Watson. ICEnothera rlparia, Nutt.] 

 Middle of May to middle of June. 



Gaura biennis, L. 



Bearing large rosettes of red-spotted leaves in autumu. August to October. 



tCircaea Lutetiana, L. Enchanter's Nightshade. 

 Last half of June. 



PASSIFLORACE^. 



Passion-Flower Family. 



tPassiflora incarnata, L. Passion-Flower. 

 Kendall Green (Professor Cliickering). 



tPassiflora lutea, L. 



Last of July or first of August ; fruit ripe in October. 



CUCURBITACE.ai. 



Gourd Family. 



tSicyos angulatus, L. Star-Cucumber. 

 August. 



CACTACEiE. 



Cactus Family. 



tOpuntia vulgaris, Ha worth. Cactus. Prickly Pear. Indian Fig. 

 Great Falls. Last week in June. 



FICOIDE.a!. 



tMoUugo verticillata, L. Carpet- weed. 

 July or August. 



Bull. Nat. Mus. No. 22 G 



