366 JOURNAL OF THE ROYAL HORTICULTURAL SOCIETY. 
that he used, and alludes to it in the avant-propos of his book, " Les 
Roses." * 
" Le procede que nous avons invent e en 1795, pour imprimer les 
planches en couleur, n'a aucun rapport avec celui que Bulliard a mis 
en usage dans son ouvrage des Champignons. Le sien, qui n'etait 
qu'une imitation de la maniere de Leblon, consistait dans l'emploi 
des couleurs, sur plusieurs planches, pour l'impression de chacun de 
ses sujets. 
" Le notre, au contraire, consiste dans l'emploi de ces memes 
couleurs, sur une seule planche, par des moyens qui nous sont particu- 
liers, et que nous nous proposons de publier un jour. C'est ainsi que 
nous sommes parvenues a donner a nos gravures tout le moelleux et 
tout le brillant de V aquarelle, comme on peut le voir dans nos Plantes 
Grasses, dans nos Liliacees, et dans nos autres ouvrages." 
Whatever the method was, no pains were spared to make the 
impression perfect. I have been told that the plates were washed 
and repainted in the natural colours after each impression. This 
produced a stipple engraving, and if a powerful lens is used to examine 
a portion of one of these, it is astonishing to note what a vast number 
of minute dots are required to form the outline of an anther or even a 
tooth at the edge of a leaf. Then a wash of colour was applied by 
hand to certain portions and some of the shadows were strengthened. 
He was such a master of light and shade that no other flower-artist has 
surpassed him in representing the natural pose of his subjects and 
making them stand out with such an idea of relief. 
Allium is so well monographed by Dr. Regel that Baker, 
as I have already stated, did not think it necessary to include the 
genus in his monograph of the Liliaceae. It is dealt with by Regel in 
two works, " Aiiiorum adhuc cognitorum monographia " (Petropolis, 
1875), and " Allii species Asiae centralis" (Petropoli, 1887). They 
are strictly botanical works, chiefly in Latin, with notes in German, 
and were published in " Acta Horti Petropoli tani, " * vols. hi. and x. 
Another book from Petrograd is " Eremurus : Kritische uebersicht 
des Gattung," by Mme. Olga Fedtscenko (1909, 6s. 6d.), a large 
quarto with twenty-four plates, and a most careful piece of work. 
The references to published notes given under the heading " Literatur," 
after the Latin diagnosis of the species, are wonderfully complete. 
The plates are from outline pen-and-ink drawings showing various 
portions of the plant, treated from a botanical and not an artistic 
point of view, and are excellent for their destined purpose. 
The Yuccas are splendidly monographed in " The Yucceae," * by 
William Trelease, in the Thirteenth Report of the Missouri Botanical 
Garden (1902). It is a fascinating paper, clear and authoritative, 
replete with references to earlier works, figures, and localities, and 
beautifully illustrated with eighty-seven photographs, many of which 
present the plants growing in their native surroundings. Others 
show seedpods, seeds, and seedlings, and others a few flowers separated 
from the spike. 
