168 BOTANY. 
compound, of a single pair of leaflets, which are distinct, or else united 
by their borders, more rarely reduced to a single leaflet. Example: © 
Bauhinia. e 
Tribe 7. Cynometree. Calyx four- to five-partite, the divisions imbricated, 
reflexed, or flowering. Petals four to five, nearly equal, more rarely 0 
Support of the ovary free, extremely short. Ovule single or double. 
Leaves compound, of one or more pairs of leaflets often tending to alter- 
nation, with or without a terminal leaflet. Example: Copaifera. 
Tribe 8. Dimorphandree. Calyx campanulate, regular, five- ae 
Five petals almost equal. Stamens five, fertile, nearly equal, alternating 
with an equal number of sterile ones. Leaves singly or doubly pinnate. 
Example: Mora. “o 
Some species of Ceesalpinieze have medicinal properties, as the Cassias, 
from which senna is derived. Tamarindus indicus, or the Tamarind tree, 
has a fruit with a laxative pulp. Ceratonia iii is the carob tree or 
Locust tree, the fruit of which is supposed to have supplied St. John in the 
wilderness. The Brazil wood of commerce is derived from Czesalpinia 
braziliensis. Hematoxylon campeachianum furnishes logwood. Balsam 
of Copaiva is derived from various species of Copaifera. The seeds of 
Gymnocladus canadensis or coffee tree of the Western States, are some- 
times roasted and used as a substitute for coffee. Gleditschia triacanthos is 
the Honey locust of the Middle and Southern States, conspicuous for its — 
numerous sharp spines. 
Sub-order 3. Mimosee. Sepals and petals valvate in eestivation, regular ; 
the latter hypogynous, distinct, or more or less united. Stamens as many 
as the petals, or very numerous (five to two hundred), hypogynous or inserted 
into the base of the corolla. Embryo straight. Leaves paripinnate or 
bipinnate. Flowers most frequently polygamous. 
Tribe 1. Parkiew. AXstivation of the calyx and corolla imbricated. 
Examples: Erythrophloeum, Parkia. 
Tribe 2. Acacvew. Aistivation of calyx and corolla valvate. Examples: 
*Algarobia, *Mimosa, *Acacia. Species of Acacia furnish various gums, 
as Gum arabic, Gum senegal, Barbary gum, &c. The pinnate leaves of 
Mimosa sensitiva and pudica display a peculiar irritability when touched, 
and are hence called sensitive plants. 
Glycyrrhiza glabra, Liquorice wood (Southern Europe) ( pl. 70, jig.14); a-g. 
Phaseolus vulgaris (Europe) (pl. 70, fig. 11). 
Indigofera anil, Indigo (East Indies) (pl. 70, fig. 18); a, fruit and flower, 
bearing branch; 0, a flower of the natural size; c, anthers; d—e, legumes; 
J, seed. 
Genista tinctoria (Europe) (pl. 70, jig. 12); f, the stigma. The remaining 
figures are easily recognisable. 
Coronilla varia (Europe) (pl. 70, fig. 10); a, flowering branch; 6, calyx; 
c, vexillum ; d, ala; ¢, carina; 7, stamens; g, stigma; A, legume; 2, ditto 
opened; k-1, seed. 
Acacia vera, Gum arabic tree (Northern Africa) (pl. 70, jig. 6); the 
different figures will readily be understood. 
168 
