Book  (Oct 2001)  Page(s) 261-262.  Includes photo(s).

Website/Catalog  (1921)  Page(s) 9.  
 
Clematis ligusticifolia. Very tall climbing Climber with feathered foliage and white blooms, which appear in large masses. . 1 piece M 15.-, 10 pieces M 140.-.

Book  (1912)  Page(s) 84.  
 
Clematis L. — N. Pff. iii. 2. 62. — Ranunculaceæ-Clematideæ.
ligusticifolia Nutt. — Kuntze, Mon. 103. — N. America. — ♄ §. 

Book  (1840)  Page(s) 9.  
 

 C. ligusticifolia (Nutt.! mss.): “plant somewhat pubescent; flowers in paniculate corymbs, diæcious; leaves pinnate and ternate; leaflets oblong, acute, mostly somewhat lanceolate-cuneate, incisely toothed and trifid; petals and stamens equal in length; carpels with long plumose tails. -C. Virginiana, Hook. fl. Bor.-Am. 1. p. 1. (in part). 
“β. brevifolia: leaves smoother, shorter and broader.
“Plains of the Rocky Mountains, in open and in bushy places, near streams. β. in the Blue Mountains and on the borders of the Oregon.Very similar to C. Virginiana, but the leaves are mostly 5-foliolate, and almost lucidly coriaceous; they are also much smaller, and in the var. a. much narrower and longer. The tails of the carpels are also longer, and more densely plumose in C. Virginiana. Flowers white and fragrant." Nutt.