74 Rydberg : Rocky Mountain flora 



The segments resemble those of some species of Cogswellia of the C. 

 triternata group, but the leaves are pinnate, not ternate, the plant 

 has the densely cespitose, sheath-covered caudex characteristic 

 of Cynomarathrum , and the fruit is of that genus, having some of 

 the dorsal ribs winged, and the calyx-teeth are prominent. It grows 

 on sides of canyons at an altitude of i,6oo m. 



Utah: Proposed dam site, near Wilson Mesa, Grand County, 

 Utah, July i, 191 1, Rydberg & Garrett 8371 (fruit; type, in herb. 

 N. Y. Bot. Gard.); also 8414 (withered flowers). 



Cogswellia simplex (Nutt.) Rydb. 

 Peiicedanum triternatum platycarpum Torr. Stansb. Rep. 389. 1852. 

 Peucedanum simplex Nutt.; S. Wats. Bot. King. Exped. 129. 1871. 

 Lomatium platycarpum C. & R. Cont. U. S. Nat. Herb. 7: 226. 



1900. 

 Cogstvellia platycarpa (Torr.) M. E. Jones, Cont. West. Bot. 12: 32. 



1908. 



It was unfortunate that an amendment to the Rochester Code 

 ever was passed at Madison, by which a varietal name could 

 supersede a specific name, and I am glad that the amendment 

 mentioned has been recalled and that we can return to the specific 

 name well known by a long usage. 



Cogswellia leptophylla (Hook.) Rydb. sp. nov. 

 Peucedanum triternatum leptophyUnm Hook. Lond. Journ. Bot. 6: 



235. 1847. 



This species is related to C. simplex, C. triternata, and C. 

 rohustior. In general habit, it resembles most the second, but 

 the leaflets are narrower, the fruit is shorter and relatively broader 

 and puberulent. C. simplex has less compound leaves, broader 

 leaflets, larger and glabrous fruit; C. robustior has much broader 

 and more spreading leaflets, longer fruit with very narrow wing. 



Montana: Helena, June-July, 1891, Kelsey; also May, 1890; 

 University campus and hillsides, Missoula, 1901, MacDougal ijo; 

 Old Sentinel, June 12, 1901, MacDougal; Deer Lodge, June, 1888, 

 Traphagen; Mt. Ascension, Helena, 1909, Butler 4057. 



Idaho: Hills near Boise, June 7, 1892, Isabel Mulford; Weiser, 

 April 18, 1900, M. E. Jones 6336. 



New York Botanical Garden. 



