OF PLATES. 
horizontal section of a stem seven years old ; the pith is seen in 
the centre, from it a number of fine lines called pith rays, or 
medullary rays, pass out to the bark, 6; the several layers or 
rings of wood are dotted off; f. 6. a piece of a Stem of the Cork 
Oak seven years old cut across ; p. the pith ; w. the wood in seven 
layers, with the pith rays passing to the bark, 6. which is in 
seven layers, the innermost or dark portion being the most 
recent. 
Pl. 11. f. 1. Zanceolate leaf of the common Mezereon : f. 2. 
orbicular, or shield like leaf of the garden Nasturtium : f. 3. 
angular leaf of the Goosefoot: f. 4. spear-shaped leaf of Con- 
volyulus or Bindweed : f. 5. digitate leaf of Monkshood : f. 6. 
decurrent leaf of the Comfrey ; in which the blade runs down 
part of the stem : f. 7. perfoliate leaf of the Haresear. 
Pl. 12. f. 1. Pinnate leaf of the Bitter Vetch : f. 2. bipinnate 
leaf of an Acacia: f. 3. hairs of different kinds; a. a simple 
hair, composed of one cavity ; 6. a simple branched hair of one 
cavity, or cell ; c. a compound hair of the Bryony ; d. compound 
hair of Lychnis ; e. stellate hair of Hollyhock; f a simple 
glandular hair; g. a gland from the Cabbage Rose: fi 4 a 
stinging hair of the Nettle, magnified ; 6. the bulb, or thickened 
portion which is imbedded in the leaf; the tube or upper part 
contains also a number of minute grains floating in a fluid: 
f. 5. and 6. stem of a Grass and Wheat; the blade surrounds 
the stem by its petiole or leaf-stalk, p. and ends at the joint 
below : f. 7. pinnate leaf of a Vetch ending in a tendril: f. 8. 
part of a stem of Furze with leaves reduced to a spine-like 
condition : f. 9. the various ways in which leaves are folded up 
in the bud, termed vernation ; the figures represent cuttings of the 
leaf or of the buds ; a. the way in which the halves of a Rose 
leaf are folded together face to face, the conduplicate vernation ; 
b. cross section of Rosemary leaf, in which the edges of the leaf 
are rolled back, the revolute vernation ; c. the leaf of the Apple, 
the edges are rolled inwards, involute vernation; d. the way in 
which the leaf of the Maple and Vine is folded in plaits, plicate 
vernation ; . section of leaves in a bud in which the outer leaves 
overlap the inner at their edges and margins, overlapping, or 
