Rydberg : Studies on the Rocky Mountain F'lora 690 



O. /on'/fUfu/i/s Chois ; DC. Prod. 13': 433. 1849. 



A. nyct(7gmea m'ttta Morong, Mem. Torrey Club, 5 : 146. 

 1894. 



In dry soil from Mi.ssouri and South Dakota to Wyoming, 

 New Mexico and Texas. 



3. Allionia hirsuta Pursh, Fl. Am. Sept. 2: 728. 18 14 



Oxybaphus hirsutus Sweet, Hort. Brit, i: 334. 1825. 



In sandy soil from Minnesota and South Dakota to Colorado. 



4. Allionia pilosa (Nutt.) 



Calymcnia pilosa Nutt. Gen. I : 26. 1818. 

 Oxybnp/uis pilosus SwQ&i, Hort. Brit, i : 334. 1825 

 This has been confused with the preceding, but I think it 

 amply distinct. So it was regarded by Nuttall and by Sweet. It is 

 perhaps nearer related to A. floribimda and Nuttall cites A. <n>ata 

 Pursh as a synonym ; but it is well to note that Nuttall describes 

 the stem of his species as pubescent, which does not agree with 

 Pursh's plant. A. pilosa grows in dry sandy soil from Wisconsin 

 and North Dakota to Texas and Louisiana. 



5. Allionia glabra (S. Wats.) Kuntze, Rev. Gen. 533. 1891 



Oxybaphus glaber S. Wats. Am. Nat. 7 : 301. 1873. 

 A rare plant from the arid districts of southern Utah, Arizona, 

 and New Mexico. 



6. Allionia bracteata sp. nov. 



A branched, more or less viscid perennial : stem glabrous 

 below, densely viscid-pubescent above, 4-12 dm. high, erect or 

 ascending : leaves subsessile ; blades oblong to linear-lanceolate 

 or linear, 3-9 cm. long, thick, mostly ciliate, glabrate : leaves of 

 the inflorescence elliptic or oblong, to lanceolate, reduced, less 

 than I cm. long, more or less viscid-pubescent : involucres often 

 numerous in terminal cymes, 10-14 mm. wide; lobes broadly 

 ovate, obtuse : perianth white or pale, about 10 mm. broad : fruit 

 oblong-obovate, 5-5.5 mm. long, prominently 8-ribbed, apiculate, 

 constricted near the base. 



This species has been mistaken for A. linearis and A. albida, 

 but is easy distinguished by the reduced leaves of its inflorescence. 

 It grows in dry rocky soil. 



