callichro'a. 



43 



calliste'phus. 



shrubby, and some annuals ; the com- 

 mon Marigold, C. officinalis, and its 

 varieties, and C. stellata, are the 

 handsomest of the annual species. 

 The Cape Marigolds, C pluvialis and 

 C. hybrida, have been removed by 

 Professor De Candolle to anew genus, 

 which he calls Dimorphotheca. 

 Both these species are hardy annual 

 plants, with very elegant flowers, 

 which close at the withdrawal of the 

 sun ; and, as they do not open at all, 

 when dark heavy clouds foretell the 

 approach of rain, Linnaeus called the 

 commonest species Calendula 'plu- 

 vialis, or the rainy Marigold. The 

 florets of the ray of the flowers of 

 this plant are of a pure white inside, 

 and of a dark purple on the outside ; 

 while those of C. hybrida are of a 

 dingy orange outside. 



Californian Annuals. — Beautiful 

 anuual plants, mostly sent home by 

 Douglas, and natives of California, on 

 the north-west coast of North Ame- 

 rica. They all bear cold much better 

 than they do heat ; and they will live 

 through the British winters in the 

 open air without any protection, 

 though they are easily killed by the 

 heat of summer, particularly if their 

 roots become by any chance exposed 

 to the full rays of the sun. The 

 roots are indeed very feeble, particu- 

 larly at the collar, where most plants 

 are strong ; and they will die in a few 

 hours if the sun strikes this vital part. 

 Nature has provided against this dan- 

 ger, by giving most of these plants a 

 trailing habit, and thus covering the 

 roots with abundance of leaves and 

 stems : but cultivators, not being 

 aware of the use of this, often, by 

 training their plants over a frame, 

 &c, expose the collar, and thus kill 

 their plants. For the mode of sow- 

 ing, &c, see Annuals. 



Calla. — See Arum. 



CallichroV. — Composite. — C. 

 platyglossa, the only species known., 



is a showy Californian annual, with 

 golden yellow flowers, requiring the 

 usual treatment of Californian an- 

 nuals. 



Callio'psis. — Composite. — Every 

 one knows the beautiful plants which 

 compose this genus under their old 

 name of Coreopsis; from which genus 

 they have been separated on account 

 of a slight difference in the internal 

 structure of the flower. The new 

 and old names have some resem- 

 blance in point of sound, but they are 

 very different in origin, for Coreop- 

 sis is derived from the Greek word 

 koris, a bug, from the resemblance of 

 the seeds to that insect ; while Cal- 

 liopsis is from kallislos, signifying 

 most beautiful. The species are 

 hardy annuals and perennials ; the 

 former of which may be sown in 

 autumn, as they will stand the winter 

 without any protection, and will thus 

 come into flower early in summer. 

 All the species will grow in any com- 

 mon soil ; and the perennial kinds are 

 propagated by division of the root. 

 Calliopsis bicolor is the same as 

 Coreopsis tinctbria. 



Calliste^ma. — One of the botanic 

 names for the China Aster. — See 

 Callistephus. 



Calliste^mon. — Myrtacece. — 

 Australian shrubs, with evergreen 

 leaves and tassel-like flowers, better 

 known by their old name of Metro- 

 sideros. They should be grown in 

 sandy loam ; and cuttings of the old 

 wood strike freely in sand under a 

 bell-glass. 



CallisteVhus, Dec. — Composites. 

 — The China Aster, which is now 

 known by botanists under this name, 

 is one of the most ornamental annuals 

 in British gardens. There are many 

 varieties, and those known as the 

 German Asters are considered the 

 most beautiful. They should be 

 raised on a hotbed in February or 

 March, pricked out when the plants 



