68 Rydberg : Rocky Mountain flora 



Atenia Garrettii (A. Nels.) Rydb. 



Carum Garrettii A. Nels. in Rose, Cont. U. S. Nat. Herb. 12: 443. 

 1909. 



Oreoxis MacDougali (C. & R.) Rydb. 

 Aletes MacDougali C. & R. Cont. U. S. Nat. Herb. 7: 107. 1900. 

 This was doubtfully referred to Aletes by Coulter and Rose. 

 The fruits in the type collection were very young and did not 

 show their true nature. Anyhow, they showed distinct wings, 

 a character inconsistent with the genus Aletes. Professor Garrett 

 and myself collected good fruits in southeastern Utah in the 

 summer of 191 1; and these show that the plant is rather an 

 Oreoxis than an Aletes, wings being present and these thick and 

 corky. The two genera are, however, more closely related than 

 has been recognized, having the same cespitose habit, the promi- 

 nent calyx, teeth, etc. 



Daucophyllum (Nutt.) Rydb. gen. nov. 



M 11 senium § Daucophyll 'urn Nutt.; T. & G. Fl. N. Am. 1: 642. 

 1840. 



Low cespitose perennials, acaulescent or nearly so, with a 

 branched caudex. Leaves numerous, basal, or 1 or 2 cauline, 

 pinnate or bipinnate with filiform or narrowly linear divisions. 

 Flowers cream-colored to yellow, in dense umbels. Bracts want- 

 ing; bractlets few, narrow, linear. Calyx teeth prominent. 

 Stylopodium wanting. Fruit ovoid or oblong, granular on the 

 intervals. Ribs equal, rather strong, but not at all winged. Oil 

 tubes 2 or 3 in the intervals, 4-6 on the commissural side. Seed 

 terete or somewhat depressed ; face plane. 



The type, Musenium tenuifolium Nutt., was separated as a 

 section in Torrey and Gray's Flora. The relationship is rather 

 with Harbouria and Aletes than with Musineon Raf. The first- 

 mentioned relationship was recognized by Coulter and Rose (see 

 their Revision, p. in). It differs from Harbouria in not having 

 thick corky ribs and in having several oil tubes in the intervals. It 

 is still more closely related to Aletes, having the same habit, although 

 narrower leaf-segments, the main differences being, however, the 

 solitary oil tubes in Aletes and 2 or 3 in each interval in Dauco- 

 phyllum, and the concave seed face in the former and the plane 



