691 Rydberg : Studies on the Rocky Mountain Flora 



Missouri : Maiden, 1894, Btish, 759 (type in herb. Columbia 

 University); Wayne, 1900, 82^ ; also Courtney, 1891 ; McDonald 

 county, 1893, j/o. 



South Dakota: Spring Basin, 1891, T. A. Williams. 



Alabama: Selma, 1888, 7l/(rGr;Y//j'. 



7. Allionia diffusa Heller, Minn. Bot. Stud. 2 : 33. 1898 



On dry plains, from North Dakota and Wyoming, to Kansas, 

 New Mexico and Arizona. 



8. Allionia lanceolata sp. nov. 



A. albida Rydb. Cont. U. S. Nat. Herb. 3: 520. 1896. Not 

 Walt. 1788. 



A branched perennial. Stems erect or ascending, glabrous 

 below, viscid-pubescent with short hairs, 4-15 dm. high: lower 

 leaves short-petioled, the upper sessile ; blades lanceolate or ovate- 

 lanceolate to almost linear, 3— 10 cm. long, very thick, obtuse or 

 blunt at the apex : involucres numerous, in terminal cymes, i — 1.5 

 cm. wide ; lobes rounded ovate, sometimes acutish : perianth pink, 

 about 10 mm. broad : fruit obovoid, 4.5—5 mm. long, with usually 

 4-5 broad ribs and finely tuberculate faces. 



This has usually gone under the name of Allionia albida which it 

 resembles in habit, but that species has white perianths and sharply 

 acute or acuminate thin leaves. A. albida is confined to South 

 Carolina and Georgia and is represented by A. lanceolata in the 

 West. The latter grows in dry soil on the plains, from Minnesota 

 and Wyoming to Tennessee and Texas. 



Colorado : Estes Park, Larirher county, Qstcrhoiit, ijj6 (type 

 in herb. N. Y. Botanical Garden). 



9. Allionia linearis Pursh, Fl. Am. Sept. 2 : 728. 18 14 



Calymenia angiistifolia Nutt. Gen. i : 26. 18 18. 

 Oxybaphns angusiifolins Sweet, Hort. Brit, i : 334. 1826. 

 In dry soil on the plains, from Minnesota to Montana, Arizona, 

 Mexico and Louisiana. 



10. Allionia divaricata sp. nov. 



A slender perennial. Stems usually solitary, erect, 6-10 dm. 

 high, glabrous and shining up to the viscid-puberulent inflores- 

 cence : leaves more or less distinctly petioled, usually spreading ; 



