ral 
40. Hoffmanseggia. Leaves bipinnate, with or without black glands, 
++ Shrubs or trees with twice pinnate leaves. 
41. Parkinsonia. Somewhat spinescent shrubs or trees: sepals equal and mostly 
valvate: pod short-stipitate : leaflets small. 
42. Ceesalpinia. A prickly shrub: sepals unequal and imbricate: pod sessile: 
leaflets larger. 
*** Flowers inconspicuous and not at all papilionaceous, polygamous: trees, 
43. Gleditschia. Thorny, with leaves simply and doubly pinnate: calyx-tube 
short, its lobes, petals, and the stamens 3 to 5. 
III. Mimosra. Flower regular, small: corolla valvate in bud, often united into a 4 
or 5-lobed cup: stamens exserted, often very numerous: leaves twice pinnate. 
* Stamens 10 or 5, distinct. 
+ Flowers 5-merous: anthers crowned with a deciduous gland. 
44._ Prosopis. Trees or shrubs, mostly spiny: pod linear, straight or variously 
curved, partitioned between the seeds and indehiscent : flowers greenish and mostly 
in axillary cylindrical spikes. 
45. Neptunia. Prostrate or aquatic herbs (or more or less woody): pod obliquely 
oblong, deflexed from the stipe, 2-valved: flowers yellow and in globose heads. 
++ Flowers 4 or 5-merous: calyx sometimes pappiform or wanting: anthers not 
gland-bearing. 
46. Desmanthus, Herbs or shrubby: flowers in globose heads: pod linear, straight 
or curved, acute, flat, membrano-coriaceous, 2-valved, 
47, Mimosa. Herbs, shrubs, or trees: flowers in globose heads or cylindrical 
spikes: valves of the pod entire or jointed, separating from and broader than the 
persistent partition. 
48. Schrankia. Herbs or shrubby: flowers in globose heads or cylindrical spikes: 
valves of the somewhat 4-sided pod entire, separating from and usually narrower 
than the persistent partition. 
49. Leuceena. Treesor shrubs: flowers in globose heads: pod broadly linear, flat, 
membrano-coriaceous, 2-valved, 
** Stamens usually very numerous, 
+ Flowers 4 or 5-merous (rarely 3 or 6-merous): stamens distinct, 
50. Acacia. Trees or shrubs: flowers in globose heads or cylindrical spikes: pod 
straight or curved, thin or thick, flat or terete, 2-valved or indehiscent. 
+~+ Flowers 5-merous: stamens monadelphous. 
51, Calliandra. Very low shrubs or herbaceous: flowers in globose heads: pod 
straight or slightly curved, the valves in dehiscing elastically revolute from apex to 
base. 
52. Pithecolobium. Trees or shrubs: flowers in globose heads or loose spikes: 
pod straightish or variously curved or contorted, the valves often twisted in dehis- 
cing, but not elastically revolute. 
1. BAPTISIA Vent. (Fase INDIGO.) 
Perennial herbs, with palmately 3-foliolate leaves, racemes of showy 
flowers, 10 distinct stamens, and an inflated many-seeded roundish or 
oblong pod stalked in the persistent calyx. 
1. B. leucophza Nutt. Hairy, about 3 dm. high, with divergent branches: leaf- 
lets narrowly oblong-obovate or spatulate; stipules and bracts large and leafy, per- 
sistent: flowers cream-color, on elongated pedicels in long reclined racemes: pod 
pointed at both ends, hoary.—Nortbern and central Texas, 
2. B. sphzerocarpa Nutt. Glabrous, 6 to 9 dm. high, with erect branches : leaflets 
obovate-oblong, obtuse (minutely pubescent when young); stipules and bracts mi- 
