374 LEG U MINOS A E 



&c. In Colutea, &c. they are inflated. Some are eaten by animals, 

 but the seed-coats are hard enough to preserve the seeds from injury. 

 Some have a coloured fleshy aril (Acacia sp., &c.). Still others have 

 hooked pods, e.g. Medicago, Mimosa. The seed is exalb. ; usu. large 

 store of reserves in the cot. 



Economically the L. are most important. The seeds of many sp. 

 form important food-stuffs, e.g. of Arachis (see Edible Products for 

 common names), Cajanus, Cicer, Dolichos, Glycine, Lathyrus, Lens, 

 Lotus, Lupinus, Phaseolus, Pisum, Vicia, Voandzeia, &c. The pods 

 of Cevatonia, Tamarindus, Phaseolus, Prosopis, &c. are also eaten. 

 A great number are valuable as fodder, and known as artificial grasses, 

 e.g. Trifolium, Medicago, Onobrychis, Lotus, Vicia, &c. Many trop. 

 and subtrop. sp. yield valuable timber, e.g. Acacia, Albizzia, Dal- 

 bergia, Gleditschia, Hymenaea, Melanoxylon, Pericopsis, Pterocarpus, 

 Robinia, Sophora, &c. ; Crotalaria and others are sources of fibre; 

 Acacia, Genista, Haematoxylon, Indigofera, &c. yield dyes; gums 

 and resins are obtained from Acacia, Astragalus, Copaifera, Hyme- 

 naea, &c. ; oil is expressed from the seeds of Arachis and Voandzeia ; 

 kino is obtained from Pterocarpus, and so on. See Economic Products 

 and genera. 



Classification and chief genera (after Taubert) : the L. are nearly 

 related to Rosaceae (especially Chrysobalaneae) and Connaraceae. 

 Warming erects L. into a separate order, and considers each of the 

 three chief divisions as an independent fam. 



The primary division is; 



I. MIMOSOIDEAE. Fls. regular, corolla valvate. 



II. CAESALPINIOIDEAE. Zygomorphic ; corolla-aestiva- 



tion imbricate ascending. 



III. PAPILIONATAE. Zygomorphic papilionaceous ; corolla- 



aestivation imbricate descending. 



These are again subdivided : the following key enables one to 

 ascertain to which of the subdivisions any Leguminous plant belongs. 



I. MIMOSOIDEAE. 



A. Calyx valvate. 



a. Sta. more than 10. 



j. Ingeae (sta. united): Inga, Calliandra, Pithecolobium, Al- 

 bizzia. 



2. Acacieae (sta. free) : Acacia (only gen.). 

 l>. Sta. as many or twice as many as petals. 



3. Enniiinoseae (anther glandless) : Mimosa. 



4. Adenanthereae (anther in bud crowned by a gland ; endo- 



sperm) : Neptunia, Prosopis. 



5. Piptadenieae (ditto, no endosperm) : Piptadenia, Entada 



B. Calyx imbricate. 



6. Parkicae : Parkia. 



II. CAESALPINIOIDEAE. 

 A. Calyx in bud quite undivided or tubular below. 



a. Leaves simple or one pair of leaflets. Sta. 10 or fewer. 

 4. Bauhinicae: Bauhinia, Cercis. 



b. Leaves once pinnate (exceptions). Sta. oo or rarely 9 13. 



