80 NATURAL HISTORY OF PLANTS. 
Campéche), Hamatoxylon campechianum' a tree from equinoctial 
America, which has been introduced into all warm countries. It 
has glabrous branches with pinnate or bipinnate leaves, whose 
stipules are caducous and membranous, or persistent and changed 
into spines. The flowers form axillary racemes and articulate with 
their common peduncle. 
Poinciana’ (Flower-fence) has expanded flowers very near those of 
certain Cesalpinias, and nearly regular as in Hematorylon, with ten 
long exserted stamens and the five petals subequal, or more rarely 
Hematoxylon campechianum. 
Fie. 51. 
Longitudinal section of flower. 
Fie. 50. 
Flower (4). 
the axillary petal overlapped in the bud different from the rest. But 
the calyx consists of five equal or subequal sepals. inserted on the rim 
of a pretty deep receptacle, thickened or quite valvate at the edges. 
The gynzceum, central or scarcely excentric,* becomes a bivalve many- 
seeded pod with. the pericarp thickened in the intervals between 
the seeds. Three species of this genus’ are known, unarmed trees 
from India, Madagascar, and the east coast of tropical Africa, with 
bipinnate leaves and large flowers in terminal racemes. 
Colvillea’ has the general characters of habit and the racemes 
1 L., Spec., 549.—Stoay., Hist., 2, t. 10, figs. 
1=4,—Buiackw., Herb.,t.463.—Hayn., Arzneig., 
ix. t. 44. —H. B. K., Nov. Gen. et Spec., vi. 325. 
2 L., Gen., n. 515 (part.).—DC., Prodr., ii. 
483 (part.).—EwpL., Gen., n. 6766 (part.).— 
B. H., Gen., 569, n. 317 (nec T., Znst., 619, t. 
391.—Gartn., Fruct., ii. 150, t. 150.—K., 
Mimos., t. 44). 
3 The foot of the ovary is stumpy and 
obliquely inserted, and usually compressed. 
The style and stamens are involute in the 
bud. 
‘ These are supported on well-developed fu- 
nicles, and possess copious very hard albumen ; 
the embryo is often yellowish green. 
5 DC., loc. cié., n. 3.—Hoox., in Bot. Mag., 
t. 2884.—Ot1v., Fl. Trop. Afr., ii. 265. 
§ Bos., in Bot. Mag., t. 3325, 3326; in Ann, 
Se. Nat., sér. 2, iv. 294.—Enp1., Gen., n. 6767. 
—B. H., Gen., 569, n.316.—Watp., Rep. v. 558. 
