MEMOIRS FROM THE DEPARTMENT OF BOTANY OF COLUMBIA UNIVERSITY 157 



Dr. Torrey in the original description gave, among other characters, the following : 

 "petalis oblongo-cuniformibus ; staminibus 20," but these characters are evidently wrong. 

 The type specimens are in the Torrey herbarium, and there is only a fragment of a single 

 flower. Dr. Gray found only 5 stamens, wherefore he referred the species questionably 

 to. H. Gordonii} Potentilla depauperata Engelm. was then undescribed, but nobody has 

 hitherto identified it with the present species ; from the type specimens, although frag- 

 mentary, it is easy to see that the two belong to the same species. 



Arizona: Dr. Woodhouse (Sitgreaves' Exp.), 1851 (type); A. L. Anderson, 1864 

 (Type of P. depauperata); J. G. Lemmon and wife, 1884; H. H. Rusby, No. 596, 1883; 

 J. W. Tourney, No. 492, 1892; Dr. E. Palmer, 1869: Oscar Land; Wolf & Rothrock 

 (Wheeler Exp.), No. 369, 1873; C. C. Parry, 1889. 



2. Comarella sabulosa (Jones). 



Potentilla sabulosa Jones, Proc. Cal. Acad. Sci. (II.) 5: 680. 1895. 



Ivesia sabulosa Jones, 1. c. as synonym. 



Illustrations: Plate 97, f. 1; dissection of flower, /. 2; pistil, /. 3 ; stamen, /. 4; 

 fruiting hypanthium and calyx, /. 5. 



Stems several from the caudex, ascending, less than 2 dm. high, more or less tinged 

 with brown, slender, glabrous. Stipules ovate-lanceolate. Leaves less than 1 dm. long, 

 glabrate, pinnate ; leaflets about 15 rather approximate pairs, 3-5 mm. long, 2-3-cleft 

 into oval segments. Cyme open and rather flat-topped, with divergent branches and 

 slender pedicels. Hypanthium glabrous, saucer-shaped, 3-4 mm. in diameter, in age 5- 

 angled; bractlets linear-subulate, thickish, much smaller than the ovate-lanceolate 

 acuminate sepals. 



Very nearly related to the preceding and scarcely distinct. It is a much smaller 

 plant, however, and less tinged with purple. Only the type specimens are known. 



Utah: M. E. Jones, No. 6032, 1894 (Sevier River). 



5. ARGENTINA Lam. 



Argentina Lam. Fl. Fran§. 3: 118. 1778. 



Potentilla L. Sp. PI. 495. In part. 1753. 



Dadylophyllum Spen. Fl. Frib. 3 : 1084. In part. 



Hypanthium almost flat; bractlets, sepals and petals normally 5, often, however, 



1 Dr. Torrey has written on the type sheet the following : "Dr. Gray is correct in stating that there are hut 5 stamens 

 in this species. He has incorrectly quoted the specific name, calling it ' millefoliaia.' " 



