ARALIACEAE. 259 
ACANTHOPANAX. 
(Family Araliaceae). 
Shrubs or exceptionally trees, 
usually armed with 1 to 3 prickles 
beneath each narrow leaf-scar and 
so likely to be mistaken for leaf- 
spines: deciduous. Twigs mode- 
rate, terete; somewhat zig-zag, 
often forming spurs: pith mode- 
rate, rounded, continuous, white. 
Buds solitary, sessile, conical- 
ovoid, with about 3 exposed thin 
scales. Leaf-scars alternate, nar- 
rowly crescent-shaped or U-shaped, 
somewhat raised: bundle-traces 5, 
small: stipule-scars lacking. Panazx 
and its compounds, following Lin- 
naeus, are treated usually as 
neuter—for no classical: reason. 
1. Scrambling or climbing. 
A. trifoliatum. 
Bushy or arboreous. 2. 
2. Trees: prickly between nodes. (Kalopanaz). A. ricinifolium. 
Loosely branched shrubs. 3. 
3. One or two prickles at each node. (1). A. pentaphyllum. 
Essentially unarmed. A. sessiliflorum. 
Prickly between the nodes. 4. 
4. Prickles slender, numerous. 
: (Eleutherococcus). A. senticosum. 
Prickles stout and strong, fewer. 5. 
5. Glabrous and smooth. A. Simonii. 
Twigs pubescent or scabrous. A. Henryi. 
