652 MIMOSACEAE 
FaxiLy 16. MIMOSACEAE — Mimosa FAMILY 
Herbs, shrubs, or trees. Leaves alternate: blades e compound, usually 
2-3-pinnate: stipules sometimes spine-like. Flowers mostly perfect, borne 
in capitate or elongate usually dense spikes or racemes. Calyx of 3-6 
partially united sepals. Corolla of 3-6 equal, distinct or partially united 
petals. ndroecium of 3-6, or many, stamens which are usually con- 
spicuously exserted. Gynoecium l-earpellary. Fruit a legume.—About 
40 genera and 1,500 species, most abundant in the tropics. 
Stamens numerous, more than 10. 
Filaments partly united into a tube. Tribe I. INGEAE. 
Filaments distinct. Tribe II. ACACIEAE. 
Stamens as many Es the petals or corolla-lobes or 
twice as m 
a 
Anthers Without “glandular appendages at the top. Tribe III. MIMOSEAE. 
sade at ent in the bud, topped by glandular 
appen nda ages Tribe IV. ADENANTHEREAE. 
I. INGEAE 
Valves of the pod not separating from the continuous nos n. 
Pods m nee once valves: leaves with few (us 
ally 4) 1 1. PITHECOLOBIUM. 
Pod with eau neue or thin-leathery very flat valves: 
leaves with several or many leafle 2 ZZIA. 
Valves of the pod separating from the continuous margin. 8. Ero 
ACACIEAE 
Ovary stipitate: petals distinct or united, commonly only t 
below d middle: pod flat, dry, the seeds not in two dis- 
tinct r 4. ACACIELLA. 
Ovary Soie petals united into a tubular-funnelform, 
gud lobed corolla: pod nearly Te or e Eu than 
high, pulpy within, the seeds in two separate 5. VACHELLIA. 
III. MIMOSEA 
Vies Rom ane pod not separating from m continuous 
Shrubs P tees seeds transverse in the pod. 6. LEUCAENA. 
Herbs: sends len thwise or oblique in the pod. T. ACUAN. 
Valves of the pod separating from the continuous margin. 
Pod slightly, if at all, flattened, 4-angled or with a broad 
margin, beaked, not jointed. 8. ooo 
Pod flat, jointed, not beaked. 9. MIA 
IV. ADENANTHEREAE 
Herbs with prostrate wiry or very slender unarmed branches: 
spikes uniform, the neutral and perfect flowers the same 
size: pod short and even. 10. NEPTUNEA. 
Spike much. longer than the perfect ones: pod elongate, 
constricted between the seeds and contorted. 11. CAILLEIA. 
1. PITHECOLOBIUM Mart. Shrubs or trees. Leaves 2-pinnate: leaf- 
lets few, often 4. Spikes oe white or m Calyx-lobes minute. 
Corolla prominently lobed. Pod narrow, contorted, of n pulpy within. Seed 
with colored arils—About 100 nar widely Bd in tropieal and sub- 
tropical regions.—Spr.-sum. or all year. 
Ovary glabrous, shorter than the stipe: petioles longer than the ee ee Caii 
P. Unguis-Cati. 
Ovary pubescent, longer than the stipe: petioles shorter than 
the petiolules. 2. P. guadelupense. 
Unguis-Cati (L.) B med or rarely unarmed shrub or small 
ds "blades of the leaflets "thinnish broadly obovate, oval, or suborbicular, 
