501 



CirCcea alpina L. Sp. PL i, 9 (1753). 



The specimens have less toothed leaves than usually, suggesting C. paciftca; but 

 evidently they are not distinct from ('. aJpina. Shaded, damp place at the foot of 

 Buckhorn Mountain, altitude 1,700 m., July 16 (No. 712). 



LOASACE^. 



Mentzelia decapetala (Pursh) Urban &. Gilg, in Eugler and Prantl. Nat. Pti. iii 

 Teil, 6 Abt. a, 111 (1894); Bartonia deoajietala Pursh; Sims, Bot. Mag. xxxvi, t. 1487 

 (1812). 



Bartonia oniala ' is two years later and must give wny to the older name. Rare: 

 Hot Springs, altitude 1,100 m., August 9 (No. 713). 



Mentzelia nuda (Pursh) Torr. & Gr. Fl. i, 535 (1840); Bartonia nitda Pursh, Fl. i, 

 328 (1814). 



Rare: Hot Springs, altitude 1,050 m., August 3 (No. 714). 



Mentzelia oligosperma Nutt. ; Sims, Bot. Mag. xlii, t. 1760 (1815). 



This was collected by Albert F. AVoods near Hot Springs, but was not obtained by 

 tho writer. 



CACTACEiE. 



Cactus missouriensis (Sweet) Kuntze, Rev. Gen. PI. i, 2.59 (1891); Mamillaria 

 misaouriensia Sweet, Hort. Brit. 171 (1827). 



Custer, altitude 1,650 m., June 4; Hot Springs, altitude 1,100 m., June 15 (No. 715). 



Opuntia humifusa Raf. Ann. Nat. 15 (1820); O. rafinesquii Engelm. Pac. R. Rep. 

 iv, 41 (1854). 



Hills, 15 miles east of Custer, altitude 1,400 m., July 23 (No. 716). 



Opuntia fragilis (Nutt.) Haw. Syn. PI. Succ. Suppl. 82 (1819); Cactus fraijilis 

 Nutt. Gen. i, 290 (1818). 

 Plant only, collected near Minnekahta, altitude 1,300 m., August 5 (No. 717). 



UMBELLIFERiE. 



Adorium tenuifolium (Nutt.) Kuntze, Rev. Gen. PI. i, 264 (1891) ; Munenium tenui- 

 folium Nutt. ; Torr. & Gr. Fl. i, 642 (1840). 



\'ery variable iu size, according to the locality. The specimens from Custer, 

 altitude 1,700 ni., June 4 and August 1, seem to be typical, therefore like those of 

 western Nebraska. Those from Hot Springs, altitude 1,100 m., June 13, growing in 

 a more shaded locality, among gypsum rocks, are large with more striate scape. 

 Those from the exposed granite rocks near Harneys Peak, altitude 2,200 m., June 8, 

 are tufted, very low and delicate (No. 718). 



Adorium hookeri (Torr. & Gr.) ; Musenium divaricatum hooker i Torr. & Gr. Fl. i, 

 642 (1840) ; Musenium trachijspermum Nutt. ; Torr. «fc Gr., loo. cit., lower on tho page. 



Hermosa, altitude 1,000 m., June 22 (No. 719). 



Carum carui L. Sp. PI. i, 263 (1753). 



The ribs of the fruit have each a bundle of strengthening cells and a small oil 

 tube, a fact tliat I have not seen pointed out. 



Near a small brook, 3 miles north of Dcadwood, altitude 1,400 m., July 5 (No. 720). 



Carum gairdneri (Nutt.) Benth. & Hook. Gen. PI. i, 891 (1867) ; Kdoamia gairdneri 

 Nntt. ; Torr. it Gr. Fl. i, 612 (1840). 



This is included in Gray's list, iu Newton &- Jenney's Report,^ but uospe<'imens 

 have been seen by tlie author from the rpgion. 



'Pursh, Fl. 1,326(1814). 



«Geol. Surv. Black Hills, 533 (1880). 



