. LEGUMINOSH-PAPILIONAOEA. 379 
come the Indigo plants,’ of which a large number of species are 
used in the preparation of Indigo blue, notably Indigofera tinctoria 
L., Anil L., cerulea Roxs., argentea L., hirsuta L. Fit., glandulosa W., 
&c.; and from several Zephrosias, such as T. tovicaria Purs., Apollinea 
DC., cinerea Purs., tinctoria Purs.,? is extracted a similar dye. In 
England and France several Genistee are sometimes used for dyeing, 
especially the Dyers’ Green-weed (Fr., Genestrolle; fig. 191). The 
Butea flowers are rich in an orange colouring matter; and the fruit- 
pulp of Sophora japonica’ is also used for dyeing yellow. In the 
United States the wood of Cladrastis lutea‘ serves the same purpose, 
and the False or Wild Indigo (Baptista tinctoria’) is employed as a 
succedaneum of true Indigo. 
The wood of several Papilionaceous trees has its industrial value. 
That of the False-Acacias’ and the Laburnums’ is pretty frequently 
used in Hurope. But lofty trees are rare except in the series Sophoree 
and Dalbergiee. These furnish a large number of woods used. for 
building and ornament, being often remarkable for their grain and 
colour, and hence prized by the cabinet-maker. The origin of many is 
still very uncertain.’ The so-called “ Angelin” woods’ are probably all 
produced by Andiras ; but some are so, most certainly. The wood of 
A, inermis is hard, dark-red outside, and is found nearly all over 
equinoctial America. The Angelin pedra of Brazil, no doubt an 
Andira,” aftords a highly prized wood. Several woods called moutouchi 
wood in Guiana are produced by species of Pterocarpus, such as 
Moutouchia suberosa AvsBu.” P. santalinus is said to yield Red 
Sandal wood. The Sang-véné or blood-veined woods of Senegal are 
those of P. erimaceus and Adansonia. That of P. dalbergioides of 
India is also much esteemed.” Those of the genus Dalbergia itself 
1 RosEntu., op. cit., 995.—GuIB., op. cit., The anatomical structure of the wood in the 
ed. 6, iii. 480. 
2 DC., Prodr., ii. 248-256.—RosEnTH., op. 
cit., 999. 
3 See p. 218, note 2, figs. 195, 196. 
4 See p. 359, note 7. 
5 See H. By., in. Dict. Encycl. des Sc. Méd., 
-vill, 338, 
6 Robinia Pseudacacia L., Spec., 1043 (see 
-above, p. 208, fig. 159), R. viscosa VreNT., R. 
hispida L. (see DC., Prodr., ti. 261). All these 
plants are perhaps only varieties of a single 
species. 
7 Cytisus alpinus Miut., Laburnum L., &e. 
(p. 330, note 7). ; 
8 Sago, in Revue Mar. et Conn. (1869). 
arborescent Papilionacee is so variable and often 
so ill known that it is impossible to give any 
general account thereof; it would need a special 
study, one of the most interesting possible. 
9 See GuIB., op. cit., ed. 6, iii. 355. We have 
seen (p. 157) that the racemose Angelin (Angelin & 
grappes) or so-called Andira racemosa is a 
Vouacapoua. 
10 A, spectabilis? SatpanwA, Config... . d. 
Prine. Mad., t. 3. 
1 Pterocarpus suberosus Prns., Syn., ii. 277. 
Tts wood is not tough. 
2 GuIB., op. cit., ed. 6, iii. 342-345. Calia- 
towr wood is also attributed to P. santalinus ; 
Bar wood or Red Sandal wood of Africa to P. 
