186 METASPERMAE OF THE MINNESOTA VALLEY. 
Genera: 6; warmer regions and in temperate zones. 
Species: 340+; 60 per cent. in Brazil. 
ERIOCAULON Linn. Gen. ed. II, 81 (1742). 
Randalia, Sphaerochloa, Symphachne BEAvUy. Ann. Sci, 
Nat. 1, xiii, 47 (1828). 
Nasmythia Hups. FI. Angl. ed. 2, 414 (1778). 
Leucocephala Roxs. FI. Ind. IIT, 612 (1832). 
Electrosperma F. MuLL. Trans. Phil. Soc. Vict. I, 23 (1855). 
Lasiolepis BoEcKL. Flora 90 (1873). 
Chaetodiscus Steup. Syn. Glum. II, 261 (1855). 
Benth. and Hook., Gen. Pl. III, 1020; Durand, Ind. Gen. Phan. 454; 
Engler and Prantl, Nat. Pflanz. 2, 1V, 26 (Hieronymus). 
Living species: 110; Asia, Africa, Australia, S. Amer- 
ica, E. N. America, Ireland and Hebrides. N. America, 4-5; 
S. Sts., 4; Canada, 1; E. Sts., 3. 
Fossil species: ?Tertiary,W.N America (Lesquereauaz). 
Eriocaulon septangulare WitH. Bot. Arr. 184 (1776). 
Nasmythia articulata Hups. Fl. Ang). 415 (1778). 
Hriocaulon decangulare HULL, Brit. Fl. 29 (1799). 
E. pellucidum Micux. Fl. N. Am. II, 166 (1803). 
E. articulatum Morone, Torr. Bull. XVIII, 353 (1891). 
Wats. and Coult., Gray’s Man. 6 ed. 567; Britt., F]. N. J. 260; Upham, 
Fl. Minn. 149; Mac., Fl. Can. II, 92; Richt., Pl. Eur. 176; Hook., Fl. Gt. 
Brit. 421; Engl. Hieron., Nat. Pflanz. II, 4, 27. 
Ireland, Skye and the Hebrides. 
North America: Newf., N. S., N. Br., Lake Superior 
and Saskatchewan; S. to N. J.; W. to Ind., Mich. and Minn. 
Minn. valley: Reported from N. edge; rare; borders 
of ponds and lakes. 
Hers.: Bailey 536, Burntside lake. 
XIV. COMMELINACEAE. Spiderwort Family. 
Endlicher, Gen. Pl. 124 (1840); Benth. and Hook., Gen. Pl. III, 
844 (1883); Schonland in Engler and Prantl, Nat. Pflanz. 2, IV, 60 (1887). 
Genera: 25; tropics, and a few in temperate regions, 
except of Asia and Europe. 
Species: 325; 90 per cent.+, in tropics. 
TRADESCANTIA Linn. Gen. 277 (1787). 
Ephemerum MoeEncuH, Meth. 237 (1794). 
Knowlesia Hassk. Commel. Ind. 5 (1870). 
Descantaria ScuLecutT. Linn. XXVI, 140 (1852). 
Heterachthia Kunze, Bot. Zeit. 1 (1850). 
Pyrrheima Hassk. Flora 366 (1869). 
Mandonia Hassk. Flora 260 (1871). 
