8 RANUNCULACE^. . clematis. 



+■ 1- Flowers irregular : follicles 1-5 : leaves lobed or dissected. 

 18 Delphiniuni. Sepals 5, the u{)per one- produced backwards into a spur: 

 petals 4, the 2 upper ones produced backwards. 



13 Acbnitnm. SSpals 5, the upper one arched into a hood : petals 5, the 3 



lower ones minute or stamen-like. 



^ ^- +. Flowers regular : carpels 1-5 : leaves compound. 



14 Isopyrnm. Sepals 5, petaloid: petals 5, sometimes none: low herbs. 



15 Cimlcifnga. Sepals 5, petaloid, caducous: petals 5 or none; tall herbs. 



* * Fruit a 1-celled berry. 



16 Actwa. Sepals 3-5, petaloid, caducous : petals 4r-10, small, soon decidu- 



ous : leaves ternately compound. 

 Tribe v. Sepals herb0,ceous, imbricated in the bud, persistent. 

 Petals conspicuous. Carpels few, many-ovuled, becoming follicles. 



17 Pseonia. Herbs or shrubs with alternate. compound leaves and large 



fleshy roots. 

 Tribe 1. Clematidese DC. Sepals valvate in the bud. Stamens 

 numerous, with adnate anthers, dirpels numerous, 1-ovuled, becom- 

 ing indehiscent hairy-tailed achenes. Ovule suspended. Herbs or 

 trailing woody plants with opposite leaves. 



1 CLEMATIS Tourn. Inst. 255. Linn. Gen. n. 696. 



Erect herbs or somewhat woody plants that climb by their 

 petioles. Sepals 5, rarely more, colored, valvate or with the edges 

 turned inwards in the bud. Petals shorter than the sepals or 

 wanting. Stamens numerous with extrorse anthers. Style persis-. 

 tent, becoming plumous appendages of the compressed achenes. 



§ 1 . Flammula DC. partly. Flowers comparatively small and 

 usually cymous-paniculate, white or whitish, in ours dioecious. 

 Sepals petaloid, thin, widely spreading. Petals none. Anthers 

 mostly short, blunt. 



€• lignsticifolia Nutt. T. & G. Fl. i, 9. Somewhat pubescent: stems.. 

 2-30 feet long : leaves quinate to quinate-ternate : leaflets oblong, acute, 

 mostly somewhat lanceolate-cuneate, incisely lobed and trifid, 2- 6 inches 

 long: flowers in paniculate corymbs : sepals thin, silky, white, 4-6 lines 

 long, equaling .the stamens: achenes pubescent, tails 1-2 inches long 

 Along streams,. IromN. Cal. to Brit.HColumbia and the Rocky Mountains. 



C. brevlfolia. C. UgusticifoUa var. brevifolia 'Nutt. T. & G. Fl. i, 9. 

 Stems woody, climbing overbru^h ahd cliffs, 3-18 feet long: leaves nearly 

 smooth, mostly 5-foliate, somewhat coriaceous ; leaflets broadly ovate to 

 lanceolate-ovate, acute or acuminate, usually 3-lobed and coarsely toothed: 

 sepals white, thin, 4-6 lines long, equaling the stamens : achenes densely 

 pubescent: silky-white tails, 1-2 inches long. Along streams, from the 

 Blue Mountains'in Oregon to Brit. Columbia. 



C. Suksdorfli Robinson in Gray's Syn. Fl, i 4. Leaves quinate, glab- 

 rous; leaflets l-l}4 inches' long: sepals widely spreading or reflexed in 

 anthesis, velvety-pubescent on the outside: heads of fruit email and few- 

 carpelled, not over an inch in diameter at full maturity including the 

 curling tail,s ; pubescence of the young achenes woolly or felt-like, the hairs 

 crinkly, not straight jior silky as in C- ligusticifolia : mature. aoheneB' with 

 broadly ovate nearly orbicular body and filiform sparsely pubescent tails. 

 Klickitat river Washington, collected and first recognized as distinct by 

 W. M. Suksdorf July 15th. 1881. 



