of New Coniferous Trees from California. 293 



It was found on the banks of a stream in a valley in the moun- 

 tains ; is about 100 feet high, and two feet in diameter. The 

 foliage is most delicate and graceful. The branches bend 

 upwards at the end like a spruce, and hang down at the tip 

 like an ostrich feather. The top shoot droops like a Deodar. 

 The timber is good, clear, and workable. 



This species has been named after Messrs Lawson, the enter- 

 prising nurserymen of the Scottish capital, who, after having 

 distributed and made generally known so many species of this 

 family of trees, are well entitled to have their names con- 

 nected with a species likely to prove a general favourite ; and 

 the attention comes well from my brother, who, if he has re- 

 ceived praise and commendation from others for the extent 

 and excellence of his collection, has received from these gen- 

 tlemen the solid pudding, they having purchased the whole of 

 his collection at a liberal price. 



Cupressus M'Nabiana. Plate X. 



C.foliis acutis, carinatis, decus satis ; ramulis curtis tor- 

 tuosis ; strobilis globosis, squamis mucronatis, mucrone con- 

 torto ; seminibus parvis, concavis. 



Habitat in California, circa lat. 41° Bor. 



Leaves acute, keeled, decussate, sub-amplexicaul at the 

 base, the older leaves ending in short firm projections. Branch- 

 lets small, short, tortuose. Cones globose, growing on a short 

 thick peduncle, about the size of a small cherry or gean. 

 Scales, six in number, irregularly four or five sided, each with 

 a strong projecting mucro in their centre, the mucro gene- 

 rally curled in at the point, especially in the younger cones. 

 Seeds small, circular, bent in the shape of a scoop. The figure 

 given of this species is taken from a dried specimen, from 

 which many of the leaves and branchlets had been broken off, 

 so that it appears less clothed than it is in reality. 



An evergreen shrub, growing to no great size, but from its 

 somewhat gnarled and tortuous appearance, likely to form an 

 agreeable variety in a lawn or shrubbery. 



My brother has named this species after our friend Mr 

 M'Nab, of the Royal Botanic Garden, Edinburgh, who con- 

 tributed much to the success of the Expedition by his judicious 



