Book  (Oct 2001)  Page(s) 320-321.  Includes photo(s).

Book  (1912)  Page(s) 84.  
 
Clematis L. — N. Pff. iii. 2. 62. — Ranunculaceæ-Clematideæ.
Pitcheri Torr. & Gray. — Kuntze, Mon. 135. — Western N. America. — ♄ §.  

Magazine  (30 Jul 1892)  Page(s) 73.  
 
C. Simsi Loud., de la Virginie; feuillage toujours vert, fleurs blanches.

Magazine  (1882)  Page(s) 185.  
 
 Le Clematis Pitcheri Torr. et GRAY est une liane du Missisippi extrémement rustique; elle ne nous parait qu'une variété du Clematis fusca Turcz. de la région de l’Amur : peut-être la forme à fleurs violacées.

Magazine  (1 Dec 1881)  Page(s) tab 6594.  
 
Review of the North American climbing species of Clematis, with compound leaves and thick or thickish erect sepals. ....
C Sepals moderately thick and more expanding; styles (in flower and fruit) either naked or silky-pubescent,
4. C. Pitcheri, Torr. and Gray, Fl. N. Am. Ranges from the Mississippi River near St. Louis to Texas and Northern Mexico. The general character of the flowers and the conspicuous reticulation of the leaflets (especially in age and in exposed situations, when they become thin-coriaceous) have caused certain forms of this species to be confounded with C. reticulata, as in PI. Wright, ii. p. 7. But its characters are quite distinct. The calyx is more similar, but greener and less canescent. As to the carpels there are two forms, and transitions between them : one (leiostylis) with the filiform styles completely glabrous from the first ; in the other (lasiostylis) they are appressed-silky or villous, either only below or for their whole length. It is this latter form which has been mistaken for C. reticulata, yet it is also the one (from Arkansas) upon which C. Pitcheri was founded. Perhaps C. Bigelovii, Torr. and Gray in Pacif. R. R. Exped. iv. 61, is the same ; but there is no specimen at Kew. In Mexico it passes into C. filifera, Benth. PI. Hartw. p. 285, which has also both glabrous and pilose styles.
5. C. crispa, L.

Magazine  (1879)  Page(s) 150.  
 
C. Pitcheri A. Gray, Rev. hort., p. 10, avec pl. col. — PI. très ornementale de l'Amérique nord-ouest, se rattachant au groupe des Viorna L. et barbellata Enc. ; elle s’en distingue par la couleur rouge vermillon de ses fleurs, par ses folioles
arrondies, vert glauque ; les segments, au nombre de 4, sont charnus et les pédoncules sont colorés et très longs. Rustique.

Magazine  (Jan 1878)  Page(s) 13.  
 
Clematis Pitcheri. — L'établissement horticole de Persan (Seine-et-Oise) à fait connaître récemment aux amateurs une très jolie Clématite nord-américaine, décrite par le célèbre botaniste Asa Gray et qui ajoute un nouvel arbuste rustique à nos jardins de plein air. Ses feuilles sont arrondies, glabres, caduques, et ses fleurs, petites et tubuleuses, sont très abondantes et d'une couleur écarlate vif. On peut se procurer cette plante en écrivant à M. Loury, à Persan-Beaumont (Oise).

Book  (1872)  Page(s) 142.  
 
C. SIMSII.—See C. reticulata.

Book  (1840)  Page(s) 10.  
 

C. Pitcheri: peduncles 1-flowered; leaves pinnate, coriaceous, reticulated; leaflets 2-4 pairs, ovate, mostly obtuse, individed or 3-lobed; branch leaves simple, ovate; sepals coriaceous, a little longer than the stamens; carpels with a short pubescent tail.
On the Red River, Arkansas, Dr. Pitcher! Nuttall ! – Leaves glabrous or slightly hairy beneath; the lowest pair 3-lobed, often subcordate. Sepals purple, about three-fourths of an inch long, reflexed at the summit, even on the margin. Tails of the carpels half an inch long, the lower part pubescent and almost plumose.