or hispid with reddish-hrown or white hairs; petioles 5-17 (-25) cm. long, 

 glabrous to densely hispid with reddish-brown or white hairs; stipular leaf bases 

 oblong, 2-3 cm. long. 10-12 mm. broad, thin; basal leaf blades simple, cordate- 

 reniform, 2-9 cm. long, 2-14 cm. wide, 3-parted with the parts lobed and 

 obtusely or acutely toothed, proximally cordate and distally acute, glabrous or 

 appressed-hispidulous; cauhne leaves alternate, petioled; pedicels to 2 cm. long in 

 flower, to 5 cm. long in fruit, appressed-pubescent; sepals 5, yellowish-green, 

 reflexed. narrowly elliptic, 3 mm. long, 1-1.5 mm. wide, appressed-pubescent 

 dorsally, prompth' deciduous; petals 5, rarely less, yellow, narrowly elliptic, 2.5-3 

 (-7) mm. long. 1-1.8 (-3) mm. wide; nectary scale glabrous, free for most of 

 its length, rounded to truncate at apex; stamens 10 to 15; achenes usually 8 to 30, 

 sometimes more or less, in globose-ovoid to hemispheroidal clusters 3-5 mm. long 

 and 4-5 mm. in diameter, discoid to elliptic or obovate, 1.8-2.5 (-3) mm. long, 

 smooth or with a trace of reticulation, glabrous or hispid, the slender beak 1-2 

 mm. long and recurved or hooked at tip; receptacle subglobose to pyriform or 

 rarely ovoid, 0.5-1 mm. long in flower, 1-1.5 or rarely 3 mm. long in fruit, 

 glabrous. Incl. var. Earlei (Greene) L. Benson. 



In wet soil on edge of and in water about springs and ponds, and along streams, 

 in N. M. (Bernalillo Co.) and Ariz. (Coconino Co.), June-July; B.C. to Alas., 

 s. to N.M., Ariz, and Calif. 



4. Ranunculus recurvatus Poir. 



Hirsute terrestrial perennial; stems erect, commonly forming a nearly spherical 

 bulbous base 5-10 mm. in diameter, not rooting, 1.5-7 dm. long, branching 

 mostly above, the lowest internode elongated, fistulous, markedly villous hirsute 

 or rarely glabrous, the hairs rarely appressed; basal leaves with glabrous or hirsute 

 petioles 5-10 cm. long, simple, cordate-reniform in outline, to 75 mm. long and 

 9 cm. broad, usually much smaller, 3-cleft to deeply 3-parted with the parts 

 either crenately lobed or toothed, cordate at base, the parts rounded or angled 

 at apex, nearly glabrous or hirsutulous or hirsute; stipular leaf bases deltoid, 

 1-1.8 cm. long, 5-9 mm. broad, thin; cauline leaves similar to the basal but not 

 usually larger, as deeply parted as the deepest of the basal; pedicels 1-8 mm. long 

 in flower, 1-5 cm. long in fruit, sparsely appressed-pubescent; sepals 5, greenish, 

 reflexed almost their whole length, ovate-acute, 4-5 mm. long, 2-2.5 mm. broad, 

 sparsely pilose dorsally, promptly deciduous; petals 5, narrowly elliptic, 2.5-3.5 

 mm. long, 1.2 mm. broad; nectary scale forming an obdeltoid pocket, the apical 

 margins truncate or sometimes proliferated into a flat scale not forming a pocket; 

 stamens 10 to 25; achenes 10 to 25 in a globose head 5-7 mm. in diameter, 

 discoid, 1.5-2 mm. long, minutely reticulate-pitted, glabrous, the margin with 

 a minute keel, the recurved beak slender and 1.2-1.4 mm. long, the tip hooked; 

 receptacle broadly or narrowly pyriform, 1 mm. long in flower, 3 mm. long in 

 fruit, conspicuously hispid, densely so at the apex. 



In swamps, woods and bottomland thickets. Okla. (Delaware Co.) and n.e. 

 Tex. (Harrison Co.), Mar .-June; from Ont. and Nfld., s. to Fla. and Tex. 



5. Ranunculus pensylvanicus L. 



Hirsute to hispid terrestrial annual (or perennial?); roots 0.7-1 mm. thick; 

 stems erect, not rooting, 4-10 dm. long, branching above, the lower internodes 

 usually elongate, hirsute to hispid with the hairs 2 mm. long; petioles 3-15 cm. 

 long, hirsute, the stipular leaf bases 1-2.5 cm. long; basal leaves withering early, 

 pinnately compound, 5-7 cm. long, 9-12 cm. wide; leaflets petiolulate, cuneate, 

 middle one 3-parted, the lateral ones 2-parted; cauline leaves alternate, similar 

 to the basal, the bracts similar to cauline leaves but reduced and sessile; pedicels 

 3-18 mm. long in flower, 1.5-5.5 cm. long in fruit, appressed-pubescent; sepals 5, 



935 



