110 LEGU MINOSAE, 
large papilionaceous flowers in stalked axillary clusters; and 
thin-walled inflated stalked few-seeded legumes. 
Leaves flat. . C. arborescens. 
Leaves crisped. C. arborescens crispa. 
Leaves concave. C. arborescens bullata. 
HALIMODENDRON. Salt Tree. 
Deciduous armed shrubs with moderate roundish twigs; 
roundish pale continuous pith; alternate raised crescent-shaped 
leaf-scars with 1 bundle-trace; minute stipule scars; ovoid sessile 
buds with several exposed scales; abruptly pinnate small leaves 
with the rachis ending in a spine beyond the few leaflets; rather 
large rosy papilionaceous perfect flowers, slender-stalked on 
swollen short spurs; and short slender-stalked swollen legumes 
with several small rounded seeds. 
Leaflets bristle-tipped. H. halodendron. 
CARAGANA. Pea Tree. 
Deciduous shrubs often with leaf- or stipule-spines; mod- 
erate or slender often angled twigs; angled often spongy or 
evanescent pale pith; alternate raised small crescent-shaped leaf 
scars with 1 bundle-trace, flanked by persistent stipules; ovoid 
rather large and appressed solitary sessile buds with several 
exposed scales; abruptly pinnate or subdigitate leaves with 
rather small entire often mucronate leaflets and prolonged 
rachis; perfect moderate-sized yellow papilionaceous flowers 
usually in small clusters from axillary spurs; and not greatly 
swollen legumes. 
1. Stipules and rachis-tip bristle-like: leaves digitate. C. frutex. 
Stipules pungent: rachis bristle-like: leaves pinnate. 2. 
Rachis pungent-tipped. 3. 
2. Leaves short, elliptical-obovate. C. arborescens. 
Leaves elongated, linear-spatulate. C. arborescens Lorbergii. 
3. Rachis persisting as a spine after fall of leaflets. C. spinosa. 
Rachis not persistent: leaflets few. 4. 
4. Leaflets distinctly pinnate. _ C. Chamlagu. 
Leaflets appearing digitate, narrow. C. pygmaea. 
