ROSALS. 441 
named by Dr. Brown in honour of the Hon. Francis Greville, are 
numerous in species there. The Hakeas and Banksiars—the latter 
mamed in honour of Sir Joseph Banks—are equally numerous. 
Tnferentially the species belonging to the order, having been found 
in Madagascar and the lesser South Sea Islands, are supposed to 
be extensively diffused over Africa. 
e LauRACcEm® are trees sometimes of great. size, distinguished 
from imperfect apetalous Dicotyledons by the dehiscence of their 
anthers. Their habitat is cool places in the tropics of either hemi- 
sphere. Laurus nobilis is the only species found in a wild state 
in Europe. The species are all more or less aromatic and fragrant ; 
some are valuable for their timber; others bear fruit like the 
nutmeg. Some yield fixed and essential oils, and an abundance 
of camphor. Cinnamon and cassia are well-known products 
of the order from the hottest parts of Asia, the former being 
produced from Cinnamonium Zeylanicum. Among the timber 
trees of the order is the Greenheart of Demerara (Nectandra 
Rodiea). 
The CassyTHace®, hoard 3 in the hottest parts of the world only, 
_ are parasitic plants, resembling the Dodders, of no known use. 
Their structure is nearly that of Laurels, the difference being in the 
fruit, which in Cassytha is enclosed in a berried calyx. Little is 
known of their properties or uses. 
Rosas. 
Trees, shrubs, and herbaceous plants, partaking somewhat of 
the Lauracez, so far as their apetalous and aromatic characters 
are concerned, but characterised by their apocarpus fruits, small 
‘umber of seeds, and amygdaloid embryo, with little or no albumen. 
eir flowers are monodichlamydeous, with distinct carpels, 
Sutural placentae, definite seeds, corolla, if present at all, poly- 
petalous, 
pchTominti with square stems, leaves opposite; simple scalrons 
stipulate flowers, axillary or aenaorgge hermaphr redite or uni- 
sexual iy by abortion; stamens numerous rted in the rim of a 
eshy tube; ovaries several; superior digest « embryo, convolute, 
with inferior radicle, 
+) 
CCVII. Calycanthaceex. 
J 
vara or shrubs, with slept stipulate leaves, a ge n ahovd cage 
Fm with each o 
us flowers in Ponce ‘niles o or cory ea ie five lobed ; 7 
° fens dente or none; a solitary carpel; styl 
2 fruit a drupe, one or two-celled. 
CCVIII, Chrysobalanacez. 
