46 MEMOIRS FROM THE DEPARTMENT OF BOTANY OF COLUMBIA UNIVERSITY 



1849: 4-2; Man. Ed. 1: 122; Ed. 2: 118; Ed. 5: 154; Pac. R. K Rep. 12?^: 39; 

 Cooper, ibid. 55 ; Noll, Fl. Pa. 433; Chapman, Fl. So. U. S. 121 ; Darby, Bot. So. States, 

 303 ; Wood, Class Book 342 ; Bot. & Fl. 107 ; Wats, King's Rep. 5 : 85 ; Proc. Am. 

 Acad. 8 : 552 ; /. c. 17 : 353 ; Porter, U. S. Geol. Surv. 1870 : 475 ; 1871 : 481 ; Coul- 

 ter, ibid. 1872 : 765 ; Port. & Coult. Syn. Fl. Col. 36 ; Coult. Man. Rocky I^Its. 83 ; Wats. 

 & Coult. in Gray, Man. Ed. 6 : 159 ; Bailey in Gray, F. F. & G. Bot. Rev. Ed. 151. 



Bongard, Veg, Ins. Sitcha, 132 ; Schlecht. Linnaea, 10 : 98 ; . Ledeb. Fl. Ross. 2 : 36 ; 

 Provancher, Fl. Can. 188 ; Seem. Bot. Herald, 51. 



Potentilla rivali.^ Rothrock, U. S. Geog. Surv. 4 : 112, at least in part. 



Illustrations: Nestl. Mon. Pot. pi. 9, f. 1; Britt. & Brown, 111. Fl. 2 : /. 1932. 

 Plate 10, f. 1 ; dissection of flower, /. 2 ; pistil, /. -J ; stamen, /. 4 ; fruiting hypanthium 

 and calyx, f. 5. 



Stems stout and very leafy, 3-8 dm. high, ascending or erect, often tinged with red or 

 brown, often several from the annual or biennial root, branched above, hirsute with long 

 and spreading hairs. Stipules broadly ovate, 1-4 cm., generally toothed. Lower 

 leaves with hirsute petioles 3-10 cm. long, the uppermost subsessile, more or less hirsute, 

 all digitately 3-foliolate or, in luxuriant forms, the lower sometimes digitately or pinnately 

 5-foliolate. Leaflets obovate, 3-10 cm. long, serrate (in the native form) with generally 

 broad teeth. Cyme generally dense and leafy. Flowers on short pedicels, about 1 cm. 

 in diameter. Cup hirsute, in fruit about 1 cm. in diameter, and with the sepals of about 

 the same length. Bracts and sepals oblong-lanceolate, acute, nearly of the same length. 

 Petals light yellow, obovate, nearly equalling the sepals. Stamens generally 20, some- 

 times only 15 ; anthers cordate, didymous. Pistils numerous ; style terminal, fusi- 

 form and glandular below. Achenes often rugulose when ripe. 



This is the stoutest of the group. It differs from the related species with tern ate 

 leaves in the size of the petals and the fruiting hypanthium ; the former about equal the 

 sepals in length and the latter often becomes 1 cm. in diameter. It is also more coarsely 

 hirsute. It ranges from Labrador to the District of Columbia westward across the con- 

 tinent, and in the Rockies, south to Mexico. Also in eastern Asia. 



Potentilla Monspeliensis Norvegica (L.). 



Potentilla Norvegica L. Sp. PI. 499. 1753. 



L Sp. PL Ed. 2: 715; Oeder, Fl. Dan. _^;/. 171; Willd. Sp. PI. 2: 1109; Poir. in 

 Lam. Enc. Meth. 5: 600; Ait. Hort. Kew. Ed. 2, 3: 279; Persoon, Syn. PL 2: 56- 

 Nastier, Mon. Pot. 29 and 66; Lehm. Mon. 29 and 153; Spreng. Syst. Veg. 2: 540; 



