SEGREGATES FROM SIEVERSIA. 177 



E. Fi/AVTJLA. Size of the last, more slender, the foliage 

 rather small, more dissected but open, not of crowded leaflets, 

 their pubescence scanty and none of it long-pilose : flowers 3, 

 on pedicels both short and slender; calyx with very short low- 

 hemispheric tube, short deltoid or deltoid-ovate segments barely 

 purpled-veined like the petals and yellowish ; bractlets small, 

 shorter than the segments, and the whole calyx quite surpassed 

 by the broad obtuse obovate petals : plume short, 1} inches long> 

 not red. 



Wind River Mountains, Wyoming, Nelson's 829 as in my 

 herbarium the type for flowers ; W. H. Forwood's, of July, 1882, 

 as in U. S. Herb., for fruit. 



E. DISSECTA. Large and with large foliage, distinguished 

 from all the foregoing by light green herbage and more finely 

 dissected foliage, the leaflets from broad-cuneiform to narrow 

 rhombic in outline, all deeply, the larger somewhat pinnately 

 cleft into oblong lobes, both faces almost glabrous except at or 

 very near the margin, there sparsely long-pilose : flowers mostly 

 S, neither the linear bractlets nor triangular-lanceolate calyx- 

 segments any more than equalling the yellow petals : mature 

 fruit not seen. 



Mountains of Central Colorado, about the sources of the 

 Platte and the Arkansas rivers, therefore on the Atlantic slope 

 of the continent. Superficially most resembling E. ciliata of 

 the far northwestern Pacific slope, yet with fair characters. The 

 best specimens are by Crandall and Cowen from near Como, and 

 from Michigan Creek, n. 624 by an unknown collector, 5 Aug., 

 1899, both these as in U. S. Herb. 



E. CILIATA. Geum ciliaium, Pursh. This is an aggregate 

 which I fail to resolve into its specific elements by any certain 

 characters. The plants all have a foliage much dissected and 

 more or less strongly though loosely pilose, the margin more or 

 less apparently ciliate. Nothing is more easy than to distinguish 

 these plants as a group, from the eastern E. iriflora ; but this 

 has a range of its own and comparatively restricted. This one 



Lkaflbtb, Vol. i. pp. 177-184. Jan. 30, 1906. 



