inflammation. An essential oil is -found in Flindersia and Cliloroxylon, as is 
indicated by their dotted leaves. The young shoots of Cedrela angustifoha 
have a powerful smell of garlic, according to Ruiz and Pavon. Ad. de Juss. 
Mem. Meliac, Satin Wood m the produce of Chloroxylon Swietenia, 
which is one of the plants that yield the wood oil of India. Royle. Oxleya 
xanthoxyla, a large tree, is the Yellow -wood of New South Wales. 
GENERA. 
§ 1. SwiETENiiE, Ad. J. Khaya, Ad. J. Flindersia, R. Br. Odontandra, Kth. 
Swietenia, L. Soymida, Ad. J. Cedrela, L. Oxleya, Hooker. 
Roia, Scop. Chikrassia, Ad. J. Cedrus, Miller. ? Ixionanthes, Jack. 
Plagiotaxis, Wall. § 2. Cedrele.®, A. de J. Johnsonia, Adans. 
Chloroxylon, DC. 
Order LXXIX, HUMIRIACE^. 
Humiriace^, de Jussieu in Aug.de St. HU. Flora Bras. Merid. 2. 87. (1829), 
Martius Nov. Gen. 2. 147. (1826) ; Conspect. iVo. 303. (1835). 
Essential Character. — Calyx 'm. 5 divisions. alternate with the lobes of the 
calyx, and equal to them. Stamens hypogynous, 4 or many times as numerous as the 
petals, monadelphous ; anthers 2-celled, with a fleshy connective, extended beyond the 2 
lobes. Ovary superior, usually surrounded by an annular or toothed disk, 5-celled, with 
from 1 to 2 suspended ovules in each cell ; style simple ; stigma lobed. Fruit drupaceous, 
with 5 or fewer cells. Seed with a membranous integument; embryo straight, oblong, 
lying in fleshy albumen ; radicle superior. — Trees or shrubs. Leaves alternate, simple, 
coriaceous, without stipules. Flowers somewhat cymose. 
Affinities. These are not well made out; they differ from Mehacese 
very much in habit, and in many respects in fructification, especially in having 
the aestivation of the corolla quincuncial, not valvate, and the stamens some- 
times indefinite; the anthers of Humiriaceae, as Von Martius observes {Nov. 
Gen. 8{C. 2. 147,), are very different from those of Meliaceae in the great dila- 
tion of their connective ; their albuminous seeds and slender embryo are also 
at variance with Meliaceae. In the latter respect, and in their balsamic wood,, 
they agree better with Styraceae, as also in the variable direction of the embryo. 
Besides these points of affinity. Von Martius compares Humiriaceae with 
Chlenaceae, on account of both orders containing definite and indefinite 
monadelphous stamens, several stigmas, partially abortive cells, inverted al- 
buminous seeds, and a singular complicated vernation, by which two lon- 
gitudinal lines are impressed upon each leaf. To me it appears, that the 
real affinity is with Aurantiacese ; an affinity indicated by their inflore- 
scence, the texture of their stamens, their disk, their winged petioles, and 
their balsamic juices. 
Geography. All Brazilian trees. 
Properties. Humirium floribundum, when the trunk is wounded, yields 
a fragrant liquid yellow balsam, called Balsam of Umiri, resembling the pro- 
perties of Copaiva and Balsam of Peru. Martius, 
GENERA. 
Humirium, Mart. 
Sacoglottis, Mart. 
Hcllcria, Mart. 
