Clematis 



Ranunculaceae 



463 



50 



Map 952 



Clematis Viorna L. 



o 3o 

 Map 954 



Clematis vircjiniana L. 



2542. CLEMATIS L. 



Flowers solitary; sepals thick, purplish or pinkish purple. 



Styles pubescent their entire length with long spreading hairs; hairs usually about 

 3 mm long at maturity, those toward the apex shorter; stigmatic lines about 



0.5-1 mm long; mature stigma about 4 cm long; flowers pinkish purple 



1 . C. Viorna. 



Styles pubescent only at the base or up to the middle with more appressed hairs; 

 hairs usually about 2 mm long; upper part of style naked or with only a few 

 hairs; stigmatic lines usually 1.5-2 mm long; mature stigma about 2 cm long; 

 flowers purplish or nearly colorless above the middle 2. C. Pitcheri. 



Flowers many, cymose-paniculate ; sepals thin, white 3. C. virginiana. 



1. Clematis Viorna L. (Viorna Viorna (L.) Small.) Leatherflower. 

 Map 952. Infrequent to rare throughout the state except in the northern 

 two tiers of counties where it is either absent or very rare. Clark's report 

 from Marshall County is the only one from these counties. It is found 

 mostly on the rocky, wooded slopes of streams. 



The leaves of this species, as of the next two, are variable in the 

 amount of the pubescence of the lower surface of the leaflets. Some are 

 nearly glabrous while the majority are more or less densely pubescent. 

 Plants with the apex of the leaflets long-acuminate are Clematis Ridgwayi 

 Stanclley. I have a specimen of this form from Martin County named for me 

 by Standley, and I have specimens from other counties which I refer to it. 



Pa. to Mo., southw. to Ga. and La. (Brown. Torreya 29: 159. 1929.) 



2. Clematis Pitcheri T. & G. (Viorna Pitcheri (T. & G.) Britt.) Pitcher 

 Leatherflower. Map 953. This species is very local in low ground in the 

 Lower Wabash Valley and I have found it twice near the Ohio River. The 

 reports of Blatchley from Vigo County and Clements from Daviess County 

 are, no doubt, correct. Thompson reported it from Carroll County and 

 this report, without doubt, should be referred to the preceding species. 



Southern Ind. to Nebr., southw. to Tex. 



