PLATE XVII. 



1. CHELIDONIUM GLAUCUM, 



YELLOW-HORNED POPPY. 



THIS genus furnishes a plant of the hardy herbaceous flowery 

 kind. 



It belongs to the class and order Polyandria Monogynia, and ranks 

 in the natural order of Rhoeadece. 



The characters are: that the calyx is a two-leaved roundish pe- 

 rianthium: leaflets subovate, concave, obtuse, caducous: the corolla 

 has four roundish flat petals, spreading, large, narrower at the base: 

 the stamina consist of very many filaments (thirty), flat, broader at 

 top, shorter than the corolla: the anthers are oblong, compressed, 

 obtuse, erect, and twin: the pislillum is a cylindric germ, the length 

 of the stamens: there is no style: the stigma headed and bifid: the 

 pericarpium is a cylindric silique, sub-bivalve: the seeds very many, 

 ovate, increased, and shining: the receptacle linear, between the 

 valves of a kind of circumambient suture, not gaping. 



The species worthy of cultivation as an ornamental plant is 

 C. glaucum, Sea Celandine, or Yellow-horned Poppy. 



It has a strong stem: the root-leaves are pinnatifid, waved, va- 

 riously lobed, and indenled ; pinnas gradually larger upwardsi; hairy 

 on both sides: stem-leaves embracing, deeply indented, rough above, 

 smooth beneath: the branches are dichotomous: the flowers are of 

 a scarlet colour, and succeeded by long horn-shaped pods. The 

 root, according to some, is annual, but others assert it to be pe- 

 rennial. 



Culture. These plants are raised from seed, which should be 

 sown either in the autumn or spring where the plants are to remain; 



