52 RANUNCULACEAE. 
CLEMATIS. Virgin’s Bower. 
(Family Ranunculaceae). 
Soft-wooded climbers. Shoots 
6- or 12-angled over the vascular 
bundles, with cavities in the cor- 
tex under the ridges, straw-colored 
or brown: pith angled or star- 
shaped, white, continuous with 
thin firmer diaphragms at the 
nodes, or said to be excavated be- 
tween them in C. Vitalba. Buds 
rather small, ovoid or flattened, 
sessile, solitary, or superposed in 
C. recta, with 1-3 pairs of exposed 
somewhat hairy scales. Leaves 
not disarticulating, though dying, 
with prehensile petioles or petiol- 
ules: no stipules or stipule-scars. 
Winter-character references:— 
C. japonica. Shirasawa, 281, pl. 12. 
C. recta. Velenovsky (paper on 
superposed buds published at . 
Prag in 1884) Botanisches Cen- 
tralblatt, 26:10.—C. vitalba. Bosemann, 40; Schneider, f. 121; 
Willkomm, 7.—C. viticella. Bosemann, 40. 
1. Stem glaucous and glabrous. 2. 
Stem not glaucous. 3. 
2. Stem 6-sided, brown. (1). C. verticillaris. 
Stem 6-ridged, gray. C. texensis. 
3. Stem straw-colored, 12- or 18-ridged. (2). C. paniculata. 
Stem brown, the 6 primary ridges stronger. 4. 
4. Stem glabrate. (3). « C. Jackmanni. 
Stem more or less hairy. 5. 
5. Finely pubescent. (4). C. virginiana. 
Rather woolly at the nodes. 5 C. Pitcheri. 
