XX.XV111 GATCDEN BOTAXY. 



a purple eye, often turning reddish ; the seeds green or brownish. Sea-Island 

 Cotton is a variety with black seeds and longer wool ; the stem hecoming 

 woody at the bottom. Tree Cotton ( G. arboreum), which it has been pro- 

 posed to cultivate (but which will not answer), grows to a shrub in warm 

 climates, and has narrower lobes to the leaves, the flower often reddish. 



Order CAMELLIACEJE. Camellia Family. 



Manual, p. 70. — Two Chinese and Japanese showy-flowered shrubs of this 

 order are familiar, viz. the Tea-plant, which is rare in green-houses, and the 

 Camellia, which is very common. They are so much alike that they ought to 

 belong to the same genus. 



1. Thsea Ghinensis, Tea Plant, has rather small white flowers, the pet- 

 als and the stamens nearly distinct; the anthers roundish. 



2. Camellia Japoilica, Camellia, has large flowers (white, pink-red, &c., 

 single or double), the base of the petals and of the stamens united together, 

 and the anthers oblong. The varieties are many : the flowers, produced in 

 winter, are much prized. 



Order AURANTIACEJE. Orange Family. 



The shrubs or trees of this order common in cultivation, in houses, &c, are 

 known by their evergreen alternate leaves, which are pellucid-punctate (i. e. 

 through a glass they appear as if riddled with small holes), and with a joint 

 between the blade and the petiole, which last is generally leafy-winged or mar- 

 gined ; the flowers white and very fragrant ; the stamens rather many in a single 

 row, on an hypogynous disk. They are all of the genus Citrus, and originally 

 perhaps of one species. 



1. Citrus vulgaris, Bitter Orange, with a broadly winged petiole, the 

 fruit with a bitter and acid pulp. 



C. Aurantium, Sweet Orange, with a narrow wing or margin to the 

 petiole, and a sweet pulp. 



C. Limonium, Lemon, with a narrow wing or margin to the petiole, 

 oblong and acute toothed leaves, and a very acid pulp. 



C. Limetta, Lime, with wingless petiole, and roundish serrate leaves, a 

 harder rind, and sweetish pulp. 



C. Medica, Citron, with wingless petiole, oblong leaves, and a very 

 thick rind to the fruit, the pulp acid. 



Order LINACEJE. Flax Family. 



Manual, p. 70. — Two or three species of Flax are cultivated in gardens for 

 ornament, and one in the fields for its fibres and seeds. 



1. Linum usitatissimum, Common Flax. Annual, with narrow lan- 

 ceolate leaves, blue flowers, pointed sepals, and a 10-celled pod. 



L. perenne, Perennial Flax. Sparingly cult, in gardens ; with blue 

 flowers and oval blunt sepals. 



L. graudiflorum, with oval leaves and showy red or crimson flowers, 

 produced all summer in gardens. 



Order GERANIACEJE. Geranium Family. 



Manual, p. 72. — The common cultivated plants, especially house-plants, 

 prized for their scented leaves as well as handsome blossoms, are from the Cape 



