RANUNCULACEAE. 1 57 



Akenes hispid on the faces. R. bongardi. 

 Akcnes smooth. R. bongardi douglasii. 



Beaks of the akenes not hooked 

 at the tip. 

 Akenes long beaked. R. orthorhynchus . 



Akenes short beaked. 



Plants decumbent, creep- 

 ing by stolons; petals 

 showy. R. repens. 



Plants erect or ascending, 

 not stoloniferous. 

 Head of akenes oblong; 

 petals not longer 

 than the sepals. R. pennsylvanicus. 



Head of akenes glo- 

 bose; petals longer 

 than the sepals. R. oreganus. 



Ranunculus purshli Richards. Aquatic and glabrous or more commonly 

 terrestrial on muddy banks, and then pubescent; leaves orbicular, palmately 

 3-cleft, the segments 2-5-lobed; petals yellow, 4-5 mm. long, scarcely longer 

 than the sepals; akenes without distinct border, tipped with a short straight 

 beak. 



Rare in our limits. 



Ranunculus cymbalaria saximontanus Fernald. Perennial, nearly glabrous; 

 leaves clustered at the base and at the joints of the long slender stolons, 

 ovate or ovate-cordate, coarsely crenate, thick, the petioles often pilose; 

 scapes 1-7-flowered, 3-15 cm. high, commonly pilose; petals 5-8, pale 

 yellow, 4-9 mm. long, exceeding the sepals; heads of akenes oblong, 6-12 mm. 

 long. 



Moist soil especially where saline. 



Ranunculus fiammiJa unalaschensis (Bess.) Ledeb. Stems slender, creep- 

 ing, rooting at the lower joints, 15-30 cm. long; leaves narrowly-lanceolate, 

 short-petioled, acute at each end, 2-5 cm. long, shorter than the internodes; 

 flowers small, yellow, mostly solitary on the ascending tips of the stems; akene 

 small, smooth, short-beaked. 



Gravelly borders of lakes and streams, common. 



Ranunculus flammula reptans (L.) Schlecht. Stems very slender, rooting 

 at all the joints; leaves linear to linear-spatulate, 10-25 mm. long. 



Gravelly or sandy shores of lakes and streams, especially in the mountains 

 at low altitudes. 



Ranunculus alismaefolius Geyer. Glabrous throughout, rather stout, 

 40-60 cm. tall, branched above; radical leaves long-petioled, lanceolate or 

 ovate, obtusi^ usually cuneate at the base, entire or obscurely denticulate, 

 5—10 cm. long; cauline leaves narrower, mostly sessile; peduncles elongated; 

 sepals small; petals yellow, cuneate-obovate, strongly-nerved, 8 mm. long; 

 akenes turgid, smooth, short-beaked. 



In wet places, Willamette Valley. Our plant is not typical of the species 

 and may be distinct, possibly referrable to R. samolifoUus Greene. 



Ranunculus allsmellus (Gray) Greene. Glabrous, 15-25 cm. high; stems 

 solitary or few from a fascicle of fibrous roots, erect or nearly so; basal leaves 

 lanceolate or oblong-lanceolate, entire, petiolcd, 2-5 cm. long, the cauline 

 smaller; peduncles slender, axillary, longer than the subtending leaves; flowers 

 yellow, small, 8-15 mm. broad; petals 5 or 6, obovate; akenes thick, short- 

 beaked, numerous in a globose cluster. 



