.. 
xxviii INTRODUCTION. 
with the petals, or free from them. In ours they are free. Lastly, whether 
they are united into a tube, or in clusters, or are all separate. In ours they are 
cre united in five clusters, and the sepals are deciduous. This brings our plant 
to the natural order, 'T111AcEz, 59, —the number referring to the page of the 
Flora where the order is described. 
Turning to that page, and comparing our plant with the character of the 
order, we notice their agreement. 
We then proceed to find the name of the genus. This is readily done, in this 
instance, by comparing the plant with the two genera comprised in this order. 
"With the first it will be found to agree in every particular, and therefore we 
need not carry it further. We find, then, the plant in question to be a species 
of the genus TiLiA, so named by Tournefort, and commonly called Linden or 
Basswood. 
Again, suppose the plant under consideration to be the common Bear-Grass. 
Having flowers, it is, of course, Phenogamous. But, cutting across the stem, we 
find, in the place of pith, wood, and bark, a white mass of cellular tissue, stud- 
ded with minute points, which are the ends of the divided threads of woody 
fibre; the veins of the leaf run parallel from the base to the apex ; the floral 
envelopes are in two rows of three each ; and the embryo, if examined, will be 
found to have but one cotyledon. In these respects, our plant differs widely 
from the Class of Dicotyledonous Plants, and we therefore turn to its alterna- 
tive, the Crass of MonocoryLeponovus PLANTS, on page xxxvii. of the Anal- 
ysis, which, we observe, includes plants possessing these characters. 
Our plant, having the floral envelopes double, and not glumaceous, falls 
under the second heading, marked with two stars ( * * L 
Proceeding as in the former example, and carefully comparing the plant with 
the analysis that follows, we see; first, if the ovary is adherent with, or free from, 
the perianth. In ours it is free. Then, if the perianth is single, or double. In 
ours it is double. Then, if the calyx and corolla are alike or unlike. In ours 
they are alike. "Then, if the leaves of the perianth are glume-like, or otherwise. 
In ours they are not glume-like. "Then, if the leaves are netted 
allel-veined. In ours they are parallel-veined. 
or3-6-celled. In ours it is 6-celled. Lastly, 
trorse. In ours they are introrse. 
This brings us to the natural order LirríAcEz, described on page 480 of the 
Flora. It contains ten genera, belonging to three tribes, the characters of which 
A dM rum in Synopsis. Our plant, by its capsular fruit, the separate 
divisions of the perianth, and leafy stem, comes under the third tribe, TULIPA- 
cEx. Of the two sections, marked with a star ( * ), our plant belongs to the 
second ; having a Palm-like stem. No. 10, Yucca, alone remains; and to it 
our plant must belong. 
-veined or par- 
Then, if the capsule is 1-celled, 
if the anthers are introrse or ex- 
Turning to page 485, where this genus is more fully described, we find it to 
; | our plant belong to iedomas... It itle: 
"* 
