786 ORD. XLIX. Tripetaloidea. CALAMUS ROTANG. 
edges serrated with spinous teeth: the flowers are produced in 
spikes, which separate into long spreading branches: the calyx is 
divided into six persistent leafits, three exterior and three interior ; 
the former are very short and pointed, the latter are oblong, con- 
_ cave, rigid, and unite closely, so as commonly to conceal the inner 
parts of the flower: it has no corolla: the filaments are six, 
capillary, and furnished with round anthere: the. germen is 
roundish, placed above the insertion of the calyx, and the style 
is trifid, filiform, twisted in a spiral manner, and terminated by 
simple stigmata: the fruit is somewhat larger than that of a filbert, 
membranous, round, one-celled, covered with regular inverted 
obtuse scales, and contains a red resinous pulp, which soon 
becomes dry: the seed is round and fleshy. It is a native of the 
East Indies, where it commonly grows in woods near rivers, and 
has long supplied Europe with walking-canes, which have usually 
been imported by the Dutch. 
According to Linnzeus there are several varieties of the Calamus 
Rotang, which he has founded upon the different figures of this. 
tree given by Rumphius; but whether these are varieties only, or 
distinct species, it is not for us to determine. The specimens of 
the Calamus in the*herbariums of Sir Joseph Banks and Dr. Smith, 
differ considerably in their foliage; so that different species of 
this obscure genus will probably in future be systematically 
defined; our business however has only been to select for de- 
lineation that which accorded best with the descriptions of it 
given by Rumphius and Kempfer, conformably to the synonyms 
to which we have referred. 
Several trees are known to abound wak a red resinous juice, 
which is obtained by wounding the bark, and called. dragon’s 
blood, as the Pterocarpus Draco or Pterocarpus officinalis of 
Jacquin, the Dracaena Draco, the Dalbergia monetaria, and the 
Pterocarpus sontolinus.—Besides these, many of the Indian red 
-woods, while growing, pour forth through the fissures of the bark” 
a, blood-coloured juice, forming a resinous concretion, to which 
