VIEW OF THE GENUS CUPRESSUS. 845 
in a wild state, and never the pyramidal form. This latter, 
however, is the one almost exclusively cultivated in California. 
Carriére maintains the distinction between C. Hartwegii and 
C. Lambertiana (Traité, ed. rr. p. 167). According to him, 
C. Hartwegii has more numerous, shorter, more dense (confuses), 
and more upright branches than C. Lambertiana. Moreover, the 
branches and branchlets are more elongated and slender, its 
leaves more distant, spreading, acuminate, and mucronate; whilst 
in C. Lambertiana they are imbricate, adpressed, and obtuse. 
C. Hartwegii is more tender in cultivation, while C. Lambertiana 
supports frost without injury. The two extreme forms are distin- 
guishable in British gardens; but the difference between them 
is not sufficient to warrant the formation of two species. 
As to the Farallones variety above mentioned, there seems to 
be some doubt, as the islands, as I am told by Prof. Greene, are 
little better than barren rocks and only with difficulty accessible. 
The information given in a letter, dated Sept. 2, 1877, by 
Mr. John Ellis to Sir Joseph Hooker, and preserved in the Kew 
herbarium, runs as follows :—“ Collected by a German on the 
Farallones Islands about 30 miles from the Golden Gate in the 
Pacific Ocean about seven years ago. It is a compact, upright, 
small tree, silvery in colour, and having a nearly round cone, and 
quite distinct in habit and colour from C. macrocarpa. The 
growth is more compact than the latter, and [it is] much slower 
in growth. The branching immediately from the ground. Ihave 
an impression that it is from macrocarpa, but the seeds from 
this variety all come true. I have called this variety, for want 
of a name, ‘argentea? Seeds of all Cypresses here [are] more 
or less abortive.” Mr. Ellis was the University Gardener at the 
time the letter was written. Prof. Sargent, zn litt., refers the 
plant to C. Goveniana. 
Fig. 19. 
Fig. 20. 
Cross section of lateral leaves Cross section of lateral leaves of 
of C. macrocarpa. x 20. C. macrocarpa, var. guadalupensis. 
The outline of a cross section of the lateral leaves of macro- 
carpa is suborbicular. The epiderm is sometimes raised into 
papular cells, and the palissade is imperfect. 222 
B 
