STATE GEOLOGIST. 59 



CACTACEJ]. Cactus Family. 



OPUNTIA, Tourn. Prickly Pear. Indian Fig. "Cactus." 



O. Rafinesqiiii, Engelm. Piickly Pear. 



On rocks : at Taylor's Falls, Miss Field, Miss Cathcart; in section 17, Haven, Sher- 

 burne county, Z7p7iam; Redstone, near New Ulm, Jun^. Eare. South. (The 

 "prickly pear" which Keating and Sii' John Richardson mention as abundant on the 

 islands of the lake of the Woods is pi'ohably Ecliinocystis lobata. Macoun.) 



O. Missouriensis, DC. Prickly Pear. 



Section 17, Omro, Yellow Medicine county, Upliam; Pipestone county (plentiful at 

 the pipestone quarry), llrs. Bennett, determined by Dr. Engelmann. Rare. South. 



O. fragilis, Haw.* Prickly Pear. 



Plentiful at the pipestone quarry, Pipestone county ("joints small, terete, with a ter- 

 minal habit of growth, making them somewhat like a string of beads"), Mrs. Bennett, 

 determined by Dr. Engelmann; Redwood Falls, Miss Butler. Rare. Southwest . 

 (The range of this species is principally westward, on the upper Missouri and Yellow- 

 stone and thence south ; but it occurs very rarely and locally farther east, being re- 

 ported by Sx<;e362/, at Baraboo, Wisconsin ) 



CUCURBITACE^. Gourd Family. 



SICYOS, L. One-Skeded Star-Cucumber. 



S. ang"ulatus_, L. One-seeded Star-Cucumber. 



Frequent through the south part of the state ; extending nortli to St. Croix Falls, 

 Miss Field, and Stearns county. Garrison. 



ECHI]S"OCYSTIS, Torr. & Gray. Wild Balsam-apple. 



E. lobata, Torr. & Gray. Wild Balsam-apple. 



Common, or frequent, through the south half of the state, and in the Red river 

 valley; extending northeast to Mille Lacs, UiDliam, the upper Mississippi river, 

 Garrison, the lake of the Woods, Dawson, and Fort Francis, Rainy river, Macoun. 



UMBELLIFER^. Parsley Family. 



HYDROCOTYLE, Tourn. Water Pennywort. 



H. Americana, L. Water Pennywort. 



Lapham. Falls of the St. Croix, Parry. East. 



H. iinibellata, L. Water Pennywort. 



North shore of lake Superior, Jitfti. Rare. East. [This species also occurs in 

 Michigan.] 



*Opuntia fragilis, Haw. The joints are small, ovate, compressed or turned, or 

 even terete ; 4 larger spines on the upper fully developed pulvilli cruciate, the upper 

 one feuberect, stouter and longer than the others, mostly yellowish-brown ; on the 

 lower margin 4-6 small white radiating spines ; bristles few. Fruit apparently some- 

 what fleshy, getting dry much later with 20 to 28 pulvilli, almost naked, only the upper 

 ones with a few short spines ; seeds few, large, regular. Engelmann and Bigelow, in 

 Pacific Railroad Report. 



