30 A GARDEN FLORA 
CARPINUS. Hornbeam. Corylacese. 
C. Betulus. Common Hornbeam. Europe, Britain, etc. 
„ var. horizontalis. 
Height 12 feet, with a head of branches 14 feet 
through. Planted in the Arboretum 1910. 
C. caroliniana. American Hornbeam. E. North 
America. 
Syn. C. americana. 
Height 6 feet, 6 inches. Planted in the Aboretum 
1912. 
C. cordata. Japan. 
Height 6 feet. A slow-growing little tree, planted 
in the Arboretum 1912. 
C. laxiflora, var. macrostachya. China. 
Height 7 feet 9 inches. A small tree, planted in 
the Arboretum 1914. It has flowered, and the fruit 
has developed. 
CARRIEREA. Bixacese. 
C. calycina. W. and Central China. 
So far the hardiness of this tree, which Mr. Wilson 
introduced from China, has not been proved. Our 
plants were raised from Mr. Wilson’s seeds, and one 
small tree has been planted out of doors for three 
years on a north-east slope, where it seems at home. 
CARYA. Hickory. Juglandacese. 
C. alba. Shell-bark Hickory. E. North America. 
Height 32 feet. Planted in the Arboretum 1902. 
C. amara. Bitter Nut. E. North America. 
Height 11 feet. Planted in the Arboretum 1913. 
C. tomentosa. Mocker Nut, Big-bud Hickory. E. North 
America. 
CARYOPTERIS. Verbenacese. 
*C. Mastacanthus. China and Japan. 
For seven or eight years C. Mastacanthus has had 
no protection in the open, and has proved quite 
hardy. In autumn it is covered with ceanothus- 
like blue flowers. 
