MIDDLESEX FLOEA. 41 



^THtJSA, L. 



,M. Cynapium, L. Fool's Paksley. 



Roadsides, Medford to Watertown (Wm. Boott). Nat. from Eu. 

 This plant has poisonous qualities, and serious results have some- 

 times ensued from confounding it with common Parsley, which it 

 somewhat resembles, but from which it may easily be distinguished, 

 when in flower, by its lack of a general involucre, and its long, hang- 

 ing involucels. July. 



lilGUSTIOUM, L. 



. *L. Scoticum, Tj. Scotch Lov age. 



Cambridge (Bigelow's Fl. Bost.) ; Watertown (C. E. Perkins). 

 Rare. Aug. 



Thaspium, Nutt. 



T. aureum, Nutt. Meadow Paesnip. 

 Common in the northern and western parts of the county. May- 

 June. 



ZiziA, Koch. (Not ZiziA of Man.) 



Z. aurea, Koch. (Thaspium aureum, Nutt., var. aptermn Man.) 

 Dunstable (Dr. C. W. Swan). 



BUPLEDEITM, Tourn. 



B. rotmidifoXium, L. 



Cambridge, one plant in gravel sidewalk (Walter Deane ; specimen 

 in herb. of). Adv. from Bu. 



CiCUTA, L. 



' C. maculata, L. Spotted Cowbane. Water Hemlock. 

 Common. July-Aug. 



C. bulbifera, L. 



Common. Aug.-Sept. 



SlUM, L. 



S. cicutsefolium, Gmel. (S. lineare, Miohx., Man.) Water 



Parsnip. 



Common. July-Aug. 

 S. Carsoni, Durand. 



Tewksbury (Dr. C. W. Swan); Ashland (Rev. Thos. Morong). 



Very rare. 



CryptotjENIA, DC. 



-C. Canadensis, DC. Honewort. 



Belmont, abundant in 1882 (Walter Deane : specimen in herb. of). 

 June-July. 



