LEAFLETS. 91 
of the leaf. They are, however, equally applicable to the sur- 
face of any other organs. (41, a.) 
. Glabrous, smooth; denoting the absence of all hairs or bristles. Hydrangea. 
Pubescent, covered with soft hairs or down. LoniceraXylosteum. 
. Rough, with hard, short, even points. Borago officinalis. 
. Pilose, with short, weak, thin hairs. Prunella vulgaris. 
Hoary, white, with very short, dense hairs. Gnaphalium. 
. Villose, with long, thin hairs. Solidago altissima. 
. Woolly, with long, dense, matted hairs. Mullein. 
Tomentose, with dense, short, and rather rigid hairs. Spirea tomentosa. 
9. Rugose, the tissue between the reticulated veins convex, from its superabun- 
dance. Sage. 
10. Punctate, dotted with pellucid glands (44,@). Hypericum punctatum. 
OIA oP & DO 
§8. COMPOUND LEAVES. 
FIG. 32.— Compound leaves. 4, Trifoliate leaves; a, pinnately, as of the bean; 3, pal- 
mately, clover 
(238. When a simple leaf becomes a compound one, the divis- 
ion takes place upon the same principle as the separation of an 
entire leaf into segments, lobes, and teeth, namely, from a defi- 
ciency of parenchyma; the number and arrangement of the 
leaflets will therefore, in like manner, depend upon the mode of 
veining. 
239. The divisions of a compound leaf are called LEAFLETS, 
and the same distinctions of outline, margin, &c., occur in them 
as in simple leaves. In the truly compound leaf, each leaflet 
