DESCRIPTION 
Pl. 9. f. 1. The thickened roots of the Dahlia: f. 2. roots of 
the Radish cut perpendicularly, showing at ¢. the collar or neck, 
the point at which the stem and root unite : f. 3. creeping stem 
or runner of the Strawberry ; 6. is the stem of the plant, which 
takes root, throws out leaves, and passes on again as a runner: 
f. 4, stem of Iris; this is an underground stem, called also a 
root-stock or rhizome, which gives off a number of roots: f. 5. 
sealy bulb of the White Lily, commonly mistaken for a root; 7. 
the roots ; sc. scales, the rudiments of leaves surrounding a. the 
axis or stem: f. 6. coated or tunicated bulb of the Leek ; ¢. the 
collar, a thin plate-like part from which the true roots 7. descend; 
sc. scales or rudimentary leaves: f. 7. the same cut perpen- 
dicularly ; ¢. the collar ; sc. a scale ; b. a bud or clove ; a. the 
axis or stem: f. 8. solid bulb of Meadow Safiron ; showing at 
a, the bulb which flowered the year before ; J. the bulb of the 
present year ; c. the part at which will be found the bulb of the 
next year. 
Pl. 10. £1. A magnified view of a part of a cross section of 
Maple ; w. the woody part of the first year’s growth ; 6. the 
green bark: f. 2. is a vertical section of the same, the letters 
signify the same parts: f. 3. a magnified view of a horizontal 
or cross section of a Maple stem four years old, exhibiting at w. 
1. the wood of the first year’s growth ; w. 2. that of the second, 
and so on, 3. 4. each year’s growth is separated by a number of 
large openings or rings which are the vessels of the stem seen 
eut across ; at b. 1. is seen the bark of the first year’s growth ; 
2, 3. 4. that of the subsequent years; atc. is a deposit which 
will become converted in the fifth year into wood and bark, thus 
the wood of the fourth year w. 4. will be separated from its 
bark, 5. 4. by new wood and new bark ; this section shows that 
the wood is added to, or increased every year by additions on its 
outside, while the bark is increased by additions on its inner 
side: f, 4. is a cross and yertical section of a piece of a stem 
which has been seven years growing ; p. the pith, surrounded 
by the wood of the first year; the figures, 1. 2. &c, mark out 
the layers or rings of wood which have been formed during the 
several years; the bark is not represented : f. 5. a eross or 
