92 KANUNCULACEAE 



3. A. Virginiana L. Closely resembles the last, but leaf divisions 

 ovate-lanceolate and sepals naore acute. — Frequent throughout in rocky 

 woods. June-July. 



4. A. Canadensis L. l°-2° high : basal leaves 5-7-parted, their 

 broad divisions cleft and toothed, long-petioled: the cauline leaves similar 

 and sessile: sepals pure white : head of fruit oblong. — Abundant in low 

 woods along the Missouri River. May. 



6. SYNDESMON Hoffmg. 

 From a cluster of tuberous thickened roots. Basal leaves 2-3, ternately 

 compound. Flowers several, umbellate. Sepals 5-10, petal-like. 

 Achenes terete, strongly ribbed. 



1. S. thalictroides (L. ) Hoffmg. RUE-ANE.MONE. 4^-9' high, 

 glabrous: petals pinkish. — Abundant in dry woods south of Dodson. 

 April-May. 



7. CLEMATIS L. 



Our species climbing vines with pinnately compound leaves. Sepals 

 4-5, valvate, petal-like. Stamens and pistils many. Styles persistent as 

 plumose or naked tails to the fruit. 



Flowers white. 1. C. Virginiana. 



Flowers purplish. 2. C. Simsii. 



1. C. Virginiana L. Vircin's Bower. Leaves :i-foliolate, the leaf- 

 lets ovate, cut-toothed, thin : flowers small, dioecious, in leafy panicles : 

 stales plumose — Along streams near Courtney, Dodson and Ked Bridge. 

 Local. July. 



2. C. Simsii Sweet. Leaflets 3-9, ovate-cordate, thick and strongly 

 reticulated : sepals V long, the tips recurved : styles plumose below. — 

 In rocky woods throughout, but rather local. June. 



8. MYOSURUS L. 



Small annuals with linear basal leaves. Sepals 5, spurred at ba.se. 

 Petals 5, clawed, small. Stamens 5-20. Pistils numerous on a long 

 slender spike- like receptacle. 



1. M. minimus L. Moi'SE-tail. Fruiting spike 1'' or more long. — 

 In wet, sandy woods near Courtney and Dodson and on wet prairies near 

 Adams, Lee's Sunnnit and Greenwood. Common locally. April-June. 



9. RANUNCULUS L. CROWFOOT. Buttercup. 



Sepals 5. Petals 5, each with a nectariferous scale at base. Stamens 

 and carpels numerous. Achenes flattened, not ribbed, tipped by the 

 style. 



Aquatic herb. 1. R. (idpfiiiiij'uliu.t. 



Not aquatic. 



Petals not longer than the calyx. 

 Plants nearly glabrous. 



Early basal leaves entire. 2. Ji. nbortints. 



