GENUS CUPRESSUS. 39 



is somewhat rapid, several specimens of which I have kept a 

 record having attained the height of 43 feet in twenty-seven 

 years. It may be of interest to state that I have seen self- 

 sown plants of the Lawson cypress along the margins of 

 woodlands in Northern Ireland. 



C. Lawson iana alba spica is not a very desirable 

 variety, though perhaps less unhealthy in appearance than 

 other patchy variegated conifers. The whitish branch tips 

 turn almost the normal green with the advent of winter. 



C. Lawson iana Alum i is of strict growth, with dis- 

 tinct and very pleasing bluish-green foliage. It is a neat and 

 interesting variety, and worthy of culture where ground space 

 is confined. 



C. Lawson iana argfentea is of moderately compact 

 growth, and rarely rises to a great height. The foliage is ex- 

 tremely pleasing, being of a decided silvery-grey tint, and 

 constant in character. 



C. Lawson iana Bowleri is a close and compact 

 growing mass of semi-pendulous deep green branches and 

 foliage. 



C. Lawson iana com pacta is of dwarf growth, and 

 forms a closely habited shrub, with ascending branches and a 

 good supply of foliage. 



C. Lawson iana coerulescens is a dwarf, bushy 

 variety, growing about 3 feet high, and with numerous and 

 much divided branches plentifully supplied with bluish-green 

 foliage, faintly marked on the upper sides with silvery-grey 

 bands. It is a decidedly worthy variety, and should have a 

 chosen spot in the ornamental grounds. 



C. Lawson iana elegfantissima— This is perhaps 

 the best variegated variety of the Lawson's cypress. It is of 

 vigorous growth, of good habit, and with the bark and leaves 

 of a delicate yellowish-green tint. 



C. Lawsoniana erecta viridis.— This is one of the 

 commonest varieties in cultivation, of tapering outline, and 

 with the branchlets closely set on, and appressed to the stem. 

 The foliage is of the brightest green the whole season through. 



