LIST OF HIGHER SEED-PRODUCING PLANTS. 135 
Minn. valley: Forest district; probably throughout; 
pools and ponds; floating on the surface. 
HERB.: Ballard 888, Lake Waconia; Ballard 62 
(partly), Chaska, Carver Co. 
Grantia columbiana (Karst). 
Wolffia columbiana Karst. 
Wats. and Coult., Gray’s Man. 6 ed. 553; Britt., Fl. N. J. 255; Upham, 
Fl. Minn. 135; Mac., Fl. Can. II, 76, 368. 
North America: Ont., Conn. and N. J.; to Minn., Mo. 
and La. 
Minn. valley: Forest district; Waconia to Blue Earth 
Co.; ponds and pools; floating near the surface. 
HeErRs.: Ballard 62, Chaska; Oestlund 182, Minnehaha. 
XII. XYRIDACEAE. Star-Eyed Grass Family. 
Endlicher, Gen. Pl. 123 (1840); Benth. and Hook., Gen. Pl. IIT, 841 
(1883); Engler in Engler and Prantl, Nat. Pflanz. 2, IV, 18 (1887). 
Genera: 2; tropics and N. temperate America; large- 
ly tropical. 
Species: 48+; principally in tropical America. 
XYRIS Linn. Gen. 31 (1787). 
Schizmaxon STEuD. Bot. Zeit. 391 (1856). 
Benth. and Hook., Gen. Pl. III, 842; Durand, Ind. Gen. Phan. 433; 
Engler and Prantl, Nat. Pflanz. 2, TV, 20 (Engler); Schenck, Palaeophyt. 
oe Living species: 40; warmer regions, except Europe; 
principally N. and 8. America. N. America, 20+; S. Sts., 18; 
E. Sts., 4; Canada, 1. 
Fossil species: ? Tertiary, W.N. America (Lesquereauz). 
Xyris flexuosa MuuL. Cat. 5 (1818). 
?.X. jupicat Micux. Fl. N. Am. I, 23 (1803) nom. dub. 
X. bulbosa KunTH, Enum. IV, 11 (1843). 
X. scabra ENGELM. Herb. Columbia Coll. 
Wats. and Coult., Gray’s Man. 6 ed. 537; Britt., Fl. N. J. 247; Upham, 
Fl. Minn. 149; Mac., Fl. Can. II, 54; Chap., Fl. 8. St. 500; Ries, Torr. 
Bull. NIX, 37. 
North America: N.S.. Ont. (in var.?), Mass. to N. J. 
and Md. to Fla.; W. to Minn., Mo., Ark. and Tex. 
Minn. valley: Reported from the N. E. district; rare 
or doubtful; sandy or peaty bogs. 
XHl ERIOCAULACEAE. Pipewort Family. 
Endlicher, Gen. Pl. 122 (1840); Benth. and Hook., Gen. Pl. ITI, 
1019 (1883); Hieronymus in Engler and Prantl, Nat. Pflanz. 2, IV, 21 
(1887). 
