LEGUMINOSAE. 157 
RospinrA. Locust. 
(Family Leguminosae). 
Trees or shrubs: deciduous. 
Wood hard, yellow or brown, ring- 
porous. Twigs zig-zag, more or 
less angled: pith round, continu- 
ous, brown. Buds small, super- 
posed beneath a membrane left 
after leaf-fall, the end-bud lack- 
ing. Leaf-scars alternate, broadly 
triangular or 3-lobed, consisting 
of a membrane that splits open 
later: bundle-traces 3. Stipules 
bristle- or prickle-like. 
Winter-character references:— 
Robinia hispida. Blakeslee & 
Jarvis, 522; Bosemann, 47; Bren- 
del, 28; Hitchcock (1), 4, (3), 12; 
Otis, 168; Schneider, f. 67; Shira- 
Sawa: 250, pl. : Ward, -2:397. & 
99; Willkomm, 36, 41, f. 68. R. 
viscosa. Blakeslee & Jarvis, 522; 
Bosemann, 47; Schneider, f. 139. 
A note on ine stipular spines of Robinia is to be found 
under Zanthoxrylum. 
1. 
2. 
3. 
Trees. 2. 
Shrubs. 4 
Twigs glandular. (1). R. viscosa. 
Twigs not glandular. 3. 
With spines. (Black locust). (2). R. Pseudacacia. 
Unarmed. R. Pseudacacia inermis. 
. Twigs both viscid and bristly. R. neo-mexicana. 
Twigs without viscid glands. 5. 
. Twigs very bristly. (Rose acacia). (3). R. hispida. 
Twigs not bristly. R. Kelseyi. 
