284 Karl M. Wiegand and Arthur J. Eames 



3. O. stricta L. Yellow Wood Sorrel. 



Dry gravelly, sandy, or stony fields and waste places ; rare. May-Aug. 

 S. e. corner of Newfield Township ; n. of lower Enfield Glen. 

 P. E. I. to B. C, southw. to Fla., Tex., and Mex., including the Atlantic Coastal 

 Plain. 



3a. O. stricta L., var. piletocarpa Wiegand. 



In situations similar to the preceding ; frequent. 



Enfield Glen; Lick Brook; Buttermilk Glen; Coy Glen; Cornell and Cayuga 

 Heights ; Ringwood ; Dryden ; Paine Creek ; and elsewhere. 



P. E. I. to B. C, southw. to N. J., also in Wyo. Introduced in Eu. 



4. O. florida Salisb. (0. filipes of Gray's Man., ed. 7.) Yellow Wood Sorrel. 

 Dry gravelly or stony exposed pasture land or fields, in sterile soils ; frequent. 



May-Aug. 



N. of Spencer Lake ; stony field on moraine n. w. of North Spencer ; gravelly flats 

 along the Inlet, Newfield-Ithaca town line ; n. of Buttermilk Glen ; Ellis Hollow ; 

 two miles n. of Etna ; pasture s. e. of Mud Pond, McLean Bogs ; knolls around 

 Chicago Bog; and elsewhere. 



Me. to N. Y. and Fla. ; rare on the Coastal Plain. 



A single colony at Chicago Bog contained forms with prominently dark-spotted, 

 faintly spotted, and unspotted corollas. In many respects 0. florida appears like a 

 hybrid of O. europaca and 0. striata. 



5. O. europaea Jord. (O. corniculata of Gray's Man., ed. 7.) Yellow Wood 



Sorrel. 



Cultivated fields, waste places, and other open locations, in dry or damp gravelly 

 or stony soils : common. June-Sept. 



Que. to N. Dak., southw. to Ga., Tenn., Okla., and Colo. Introduced into Europe 

 from America. 



Besides the typical plant, forma cymosa (Small) Wiegand and forma villicaulis 

 Wiegand have been found in the Cayuga Lake Basin. The O. corniculata, var. stricta, 

 of Dudley's Cayuga Flora included both O. stricta and O. europaca. 



69. GERANIACEAE (Geranium Family) 



a. Anther-bearing stamens 10, rarely 5 ; tails of the carpels not bearded, upcurled 

 when ripe; leaves palmately veined. 1. Geranium 



o. Anther-bearing stamens 5 ; tails of the carpels bearded within, not upcurled but 

 often spirally twisted when ripe ; leaves pinnate. 2. Erodium 



1. Geranium (Tourn.) L. 



a. Flowers large; petals about 15 mm. long; fruit 30 mm. long; lobes of the ovary 



villous; plants perennial. 1. G. maadatum 



a. Flowers smaller; petals 12 mm. long or less; fruit 7-20 mm. long; plants annual 

 or more rarely biennial. 

 b. Leaves palmately 3-5-clef t or -parted ; lobes cleft ; corolla 10 mm. long or less ; 

 lobes of the ovary glabrous or pubescent, not wrinkled, not separating from 

 the valves of the beak ; beak pubescent. 

 c. Lobes of the ovary hairy. 

 d. Seeds pitted; beak 17-23 mm. long; ovary and beak hirsute; sepals awned. 

 e. Flowers crowded ; slender tip of beak 2 mm. long. 2. G. carolinianum 

 e. Flowers loose, scattered ; slender tip of beak 3-4 mm. long. 



3. G. Bicknellii 

 d. Seeds smooth; beak 7-11 mm. long; ovary and beak puberulent; sepals 

 awnless. 4. G. pusillum 



