260 Karl M. Wiegand and Arthur J. Eames 



8. P. pumila Poir. 



Dry sandy or gravelly sterile fields, in neutral or acid soils; frequent. May-June 15. 

 North Spencer ; n. of South Hill Marsh ; Varna ; between Freeville and Mud Creek ; 

 lake slope between Renwick and Esty, common ; and elsewhere. 



X. S. to Ont., southw. to Pa. and Ohio, including the coastal region. 



9. P. canadensis L. Common Cixquefoil. Five-finger. 



Dry fields and thickets, in gravelly or sandy soils less sterile than the last preceding ; 

 common. May 20-July 1. 



S. Me. to Minn., southw. to Ga. and Tex., including the Coastal Plain. 



9a. P. canadensis L., var. simplex (Michx.) T. & G. 



In situations similar to the preceding, but especially in more sterile localities ; 

 scarce. 



Top of hill e. of Inlet, Ithaca-Xewfield town line; hilltop, Caroline; between 

 Etna and Ringwood ; two miles n. w. of Freeville; and probably elsewhere. 



Range nearly as in the typical form, but extending to X. S. and Xewf. 



16. Geum L. 



a. Upper joint of the style hairy, deciduous; calyx green; petals white or yellow. 



b. Petals white or greenish yellow, as long as the calyx or shorter ; stipules 



generally small, 7—15 (20) mm. long; some basal leaves usually trifoliolate, 



or rounded and unlobed. 



c. Plant slender, sparingly soft-hairy; receptacle of fruit densely bristly; 



achenes bristly ; petals broad, equaling the sepals. 



d. Achenes 30-60, broadly ovate to obovate, 2.5-3 mm. long; heads of fruit 



globose; peduncles finely velvety; leaves thin. 1. G. canadcnsc 

 d. Achenes 60-160, narrowly obovate to cuneate, 3-4 mm. long ; heads globose 

 or obovoid ; peduncles with longer hairs ; leaves firmer. 



la. G. c, var. camporum 

 c. Plant stout, bristly-hairy; heads of fruit globose; receptacle glabrous or 

 nearly so; achenes glabrous or rarely setose; petals about half the length 

 of the sepals, small and narrow. 2. G. virginianum 



b. Petals yellow, broadly obovate, usually slightly longer than the calyx ; stipules 

 large, 15-40 mm. long and more incised; leaves usually all pinnate, the basal 

 ones more sharply incised ; heads of fruit obovoid ; receptacle downy ; achenes 

 hispid; stems hispid. 3. G. strictum 



a. Upper joint of the style plumose; calyx purple; petals very short, greenish or 

 purplish cream-color. 4. G. rivale 



1. G. canadense Jacq. (G. album of Cayuga Fl.) White Avens. 



Damp thickets and shaded banks, in various soils ; common. June 20-July. 

 X. S. to S. Dak., southw. to Ga., La., and Kans. ; less common on the Coastal 

 Plain. 



la. G. canadense Jacq., var. camporum (Rvdb.) Fernald & Weatherby. (See 

 Rhodora 24:47. 1922.) 



In situations similar to the preceding or more open ; apparently occasional. 



Spencer Lake; Six Mile Creek (£. L. Palmer) ; bank near East Ithaca {Palmer) ; 

 Cayuga Heights ; and elsewhere. 



X. B. to X. Dak., southw. to Ala. and Okla. 



2. G. virginianum L. Bristly White Avens. 



Open swampv banks and hedgerows, in the heavier soils ; frequent. June 10- 

 July 10. 



