368 PLANT NAMES AND SYNONYMS 



a. T. dioicum L. British America, south to Alabama and Mis- 



souri. Early Meadow-rue, Feathered Columbine, Shining- 

 grass, Quicksilver- weed, Poor-man's Rhubarb* 



b. T- flaviim L. Europe. Fen Rue, Maidenhair Rue, False 



Rhubarb, Meadow or Monks' Rhubarb, Poor-man's Rhubarb. 



c. T. glaucum Desf. Spain, cult, in gardens. Spanish-tuft, Tuft- 



ed Columbinei, Feathered Columbine, the latter name applied 

 also generically. 



d. T. polygainum Muhl. (T. Cornuti Tor. & Gr.). Canada and 



eastern U. S. Tall Meadow-rue, Fall Meadow-rue, Celandine*, 

 Muskrat-weed, Musquash- weed. Rattlesnake-bite, Silver-weed^ 



1^77. THAMN6SMA, Tor. & Frem. 1845. Rutaceae. 



From Greek, * 'odorous plant". Syn. Rutosma, Gray 1849. 

 Strong-scented desert herbs. Two species, western U. S. 



1978. THAPSIA, L. Deadly Carrot. Umbelliferae. 



The ancient Greek name of T. Garganica, originally brought 

 from Thapsus. Perennial herbs. Four known species, Medi- 

 terranean region to Madeira. 



a. T. Garganica L. Mediterranean region. Deadly Carrot, 

 Drias; Fr. Thapsie (Codex), Faux fenouil; Sp. Tapsia. Boot 

 irritant, emeto-cathartic. Mesin counter-irritant, producing an 

 eruption. (b) T. Sylphium Viviani of northern Africa is 

 perhaps only a variety of i^a), the Sylpbium cyreniacum of the 

 aucients, yielding the gum resin called Laser, Laser cyreniacum, 

 Asa dulcis. 



1979. THASPIUM, Nutt. Meadow-Parsnip. Umbelliferae. 



By transposition from Thapsia, an allied genus. Syn. Thap- 

 sia, Smyrniumf, Ziziaf, in part. Perennial herbs. Three known 

 species, all of eastern U. S. 



a. T. trifoliatuni (L. ) A. Gray (Thapsia trifoliataL., S. atropur- 

 pureum Desr, T. atropurpureum Nutt.). Rhode Island to 

 Tennessee and Illinois. Purple Meadow-parsnip, Purple 

 Alexanders, Round heart. The variety aiireum (T. aureum 

 Nutt. ) with yellow flowers is called Golden Alexanders, being 

 confounded popularly with Zizia aurea, q. v. 



1980 THEA, L. Tea. Theaceae (Temstroemiaceae). 



Syn. Camellia. Evergreen shrubs or small trees. About 6 

 species, southeastern Asia. 



a. T. Chinensis L. (alsoT. Sinensis; C. Thea Link.,C. theifer* 

 Grifiith). Japan and China, cult, in India and other tropical 

 countries. Tea plant. It was formerly supposed that black and 

 green tea were derived from two distinct species, T. Bohea and 

 T. viridis, but this is an error, these varieties being produced 

 by different modes of curing. Numerous varieties are distin- 

 guished, such as Bohea, Congou, Souchong and Pekoe of black 

 teas and Hyson Skin, Twankay Hyson, Young Hyson, Impe- 

 rial and Gunpowder of the green varieties. Besides these there 

 are now in market, Japan and Ceylon teas in endless variety;. 

 Ger. Thee; Fr. The; Sp. Te, Te de China. Active constituent 

 theine or caffeine. 



