EUCALYPTUS TREES. 471 
Carum segetum, Bentham. ( Anethum segetum, 
Linné,)—Around the Mediterranean Sea, extending 
to Middle Europe. An aromatic, annual herb, avail- 
able for culinary purposes. 
Cassia fistula, Linné.—South Asia. The long pods 
of this ornamental tree contain an aperient pulp of 
pleasant taste. Traced by Dr. Hooker to the dry 
slopes of the central Himalayas. 
Casuarina Decaisneana, F. v. Mueller. — Central 
Australia, where it is the only species of the genus. 
This tree is one of the largest among its congeners, 
and particularly valuable for arid regions. 
Casuarina torulosa, Aiton.—New South Wales and 
Queensland. The wood of this handsome tree is in 
demand for durable shingles and furniture work ; it 
is also one of the best for oven fuel. 
Castaneopsis chrysophylla, A. de Candolle. — The 
Oak Chestnut of California and Oregon. A tree at- 
taining a large size of beautiful outlines. The leaves 
are golden yellow underneath. Wood durable. 
Catalpa bignonioides, Walter.—On the Gulf of Mex- 
ico. A tree in warm, humid, climatic zones of re- 
markable celerity of growth. Mr. Meehan regards 
the wood to be as durable as that of the best chesnut- 
trees, and observed a stem in twenty years to attain 
a diameter of three feet, even in the clime of New 
York. 
Ceanothus rigidus, Nuttall. — California. One of 
the best of hedge-shrubs, available for dry situations. 
Evergreen ; up to 12 feet high; the branches be- 
come densely intricate. In the coast tracts it is re- 
_placed by C. thyrsiflorus, Esch., which can also be 
used for hedges and copses, and will live in mere 
