256 metaspermae of 'rtiE Minnesota valley. 

 XLV. CRUCIFERAE. Mustard Family. 



Endlicher, Gen. PI. 861 (1S40); Benth. and Hook., Gen. PI. I, 58 (1862); 

 Prantl, Engler and Prantl, Nat. Pfianz. 3, II, 145 (1890); Baillon, Bist. PI. 

 Ill, 181 (1871). 



Genera: 160 — 200; cosmopolitan; centers of distribu- 

 tion in boreal region and Mediterranean region. Fossil forms 

 poorly understood; principally old world plants. 



Species: 2000 ±; reduced to 1200 (B. and H.); most 

 numerous in the Orient. 



THELYPODIUM Endl. Gen. 4915 (1336-40). 



Pacliyportiam Nutt. Terr, and Gray, Fl. N. Am. I, 96 ri838). 

 Macropofliiiin Hook. Bot. Beech. 74 (1841). 

 Baillon, Hist. PL III, 243; Benth. and Hook., Gen. PL I, 81; Engler 

 and Prantl, Nat. Pflanz. 3, II, 155 (Prantl); Durand, Ind. Gen. Phan. 13. 



Living species: 15 ±; mostly Calif, and Rocky mts. 

 North America, 15; Calif., 10; W. Tex., 5; Rocky mts., 7; PI. 

 King, 9; PI. Wheel., 5; E. Sts., 1; Canada, 1; S. Sts., 1. 



Thelypodium piiiiiatifidum (Michx.) S. Watson, King 

 Exp. 25 (1871). 



Hesperis {?) pinnatifidO' Michx. Fl. N. Am. II, 31 (1803). 

 Cheiranthiis hespcrioides T. and G. Fl. N. Am. I, 72 (1838). 

 lodanthus hesperioides T. and G. Gen. I, 134 (1849). 

 Wats, and Coult., Gray's Man, 6 ed. 72; Upham, Fl. Minn. 25; Chap., 

 Fl. S. St. 25; Gov., Fl. Ark. 165; Wats., Bibl. Ind. I, 73. 



North America: Penn. to Ohio and Minn.; S. to Tex. 

 Minn, valley: Only S. E. edge of valley and rare; 

 stony places. 



Herb. : Sandherg 64, Red Wing. 



LEPIDIUM Linn. Gen. 527 (1737). 



Pliysolepidiuin Schrenk. Enum. 97 (1841-42). 

 Mauoploga Bunge, PL Preiss. I, 259 (1836). 

 Cardaria Desvx. Jour. Bot. Ill, 163 (1810). 

 Lepia Desvx. Jour. Bot. Ill, 166 (1810). 

 Cyuocardamum Weub, Phyt. Can. I, 96 (1836). 

 Baillon, Hist. PI. Ill, 284; Benth. and Hook., Gen. P/. I, 87; Engler 

 and Prantl, Nat. Pflanz. 3, II, 160 (Prantl); Durand, Ind. Gen. Phan. 17; 

 O. Kuntze, Bev. Gen. PI. I, 34; Gray, III. Gen. 1, 167; Schenck, Palaeophyt. 

 514. 



Living species: 100 ±; 60-80 (B. and H.); all regions 

 except arctic and alpine. Russia, 20; Europe, 25; European 

 Russia, 9; North America, 17; PI. King, 9; PI. Wheel., 5; W. 

 Tex., 4; Canada, 3-7; S. Sts., 1; E. Sts., 2. 



Fossil species: 1, Upper Miocene, Europe (Heer); 

 doubtful. 



