128 



Flora of the Malayan Peninsula. 



3. 



4. 



U. sclerophylla. 

 U. pedicellata. 



U. ferrea. 



U. glahrata. 



U. Kunstleri, 

 U. Wrayi. 



Flowers 1'5 in. long; leaves broadly oblong or 

 ovate-rofcnnd, 5 to 7 in. long 



Flowers 1 in, long ; leaves 4 or 5 in. long, oblong 

 or ovate, never rotand-ovate 

 Calyx-lobes filiform, longer than the tube, spread- 

 ing ; tube of corolla very slender ; capsules on long, 

 slender stalks : — 



Young branches, under surfaces of leaves, and 

 capsules rnsty-pubesoent 



Young branches and capsules glabrous ; leaves 

 slightly pubescent on the under surface only ... 



Leaves glabrous or neai-ly so on both su rf aces : — 

 Lobes of the calyx shorter than the tube 

 Lobes of the calyx as long as the tube ... 

 Lobes of the calyx short, broad, blunt : — 



Leaves quite glabrous, not glaucescent beneath : — 

 Leaves 1'75 to 2'5 in. long : — 



Leaves with 3 or 4 pairs of nerves ; tube of calyx 

 densely pubescent, the lobes of the limb sub-glab- 

 rous ... 



Leaves with 5 or 6 pairs of nerves ; tube and lobes of 

 calyx pubescent externally 

 Leaves 35 in. or more in length : — 

 Nerves of leaves 5 or 6 pairs ... ... ... 



Nerves of leaves 3 pairs 

 Leaves glabrous, glaucescent beneath ; nerves of leaves 7 

 or 8 pairs, the reticulations transverse and very distinct 

 beneath ... 



Leaves glabrous, but the 4 or 5 pairs of main-nerves with 

 tufts of hair on the lower surface, at their union with the 

 midrib 



Leaves uniformly canescent beneath : nerves 5 or 6 pairs 

 Under surfaces of midrib and the 4 to 6 pairs of main- 

 nerves laxly hirsute, sometimes with tufts of hair in the 

 nerve-axils ... 

 Calyx-tube long, the teeth very short and blunt : — 

 Nerves of leaves 6 to 8 pairs, stout, and bearing like the 

 midrib and transverse veins shoi-t pale-brownish hairs ... 



J. Uncaria Roxburghiana, Korth. in Ver. Nat. Gesch. Bot. 172. 

 Young branches obtusely 4-angled, densely clotbed with minute, par- 

 tially deciduous, harsh, rusty tomentum. Leaves coriaceous, ovate, 

 acuminate sometimes caudately so ; the base rounded, emarginate or 

 minutely cordate ; both surfaces reticulate, the upper strigose-scabrid, 

 the lower with longer curved hispid hairs ; main-nerves 4 or 5 pairs, 

 curved, spreading, ascending, depressed on the upper and prominent on 

 the lower surface like the midrib; length 2'5 to 3*5 iu. j breadth 1'5 to 



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