DESCRIPTION OF THE PLATES. 
column. Fig. 6, the column supporting its anthers : all more or less magnified. Fig. 7, a 
female spikelet. Figs. 8 & 9, the two terminal achenia, with their tubillus exserted : nat. 
size. Fig. 10, a longitudinal section of the achenium, enclosing the seed with its integu- 
ments, gland, and tuhiUus. Fig. 11, the same, with the pericarp removed. Fig. 12, the 
albumen. Fig. 13, a longitudiual section of the same, showing the enclosed embryo. 
Fig. 14, the embryo, seen on its edge : all equally magnified. 
B. Portion of a male plant of Ephedra Tweediana. 
Fig. 1, a pair of leaflets. Fig. 2, the same, split open by age : na(. size. Fig. 3, a pair 
of involucels. Fig. 4, a portion of an involucel enclosing the spicular fibres. Fig. 5, one 
of these fibres. Fig. 6, a perigonium enclosing the antheriferous column. Fig. 7, the 
antheriferous column : all more or less magnified. Fig. 8, a female spikelet. Fig. 9, the 
terminal pair of achenia, each with its exserted tubillus. Fig. lO, the two achenia 
separated: all nat. size. Fig. 11, the two achenia, magnified. Fig. 12, one of the 
achenia, seen edgewise. Fig. 13, half of the pericarp removed, to show the enclosed 
seed surmounted by its exserted tubillus. Fig. 14, the seed, removed. Fig. 15, half of 
the two integuments, removed, which are agglutinated in their lower moiety, free and 
corrugated above, and then again united upon the apical gland which supports the tubillus. 
Fig. 16, the albumen, removed. Fig. 17, longitudinal section of the same, showing the 
enclosed embryo. Fig. 18, the embryo, removed, seen on its edge; all equally magnified. 
Fig. 19, the mode of germination of the seed of Ephedra Tweediana, where the pericarp 
splits to allow the exit of the growing seed (copied from Prof. Meyer’s drawing). 
Fig. 20, the growing seed, deprived of its pericarpial covering, showing the sphtting of 
the albumen and the expansion of the radicle and cotyledons, the integuments being still 
surmounted by the persistent gland and tubillus : m^ecA magnified. 
Plate 79. — Ephedra. 
A. Portions of the male and female plants of Ephedra scandens. 
Fig. 1, a male spikelet. Fig. 2, a female spikelet. Fig. 3, the lower pair of involucels, 
upon the pedicel. Fig. 4, the second pair. Fig. 5, the third pair. Fig. 6, the fourth or 
terminal pair, which enclose the two achenia. Fig. 7, the two achenia separated : all 
nat. size. Fig. 8, the two achenia with their exserted tubillus, magnified. Fig. 9, one 
of the same, seen sidewise. 
B. A portion of a male plant of Ephedra frustillata. 
Fig. 1, a pair of leaflets. Fag. 2, a male spikelet on its pedicel : hoih nat. size. 
Plate 80. — Aristotelia MAarr. 
Fig. 1, a flower. Fig.. 2, the calyx. Fig. 3, a petal. Fig. 4, some of the stamens ; all 
natural size. Fig. o, a petal. Fg. 6, the same, seen sidewise. Fig. 7, a stamen : all 
magnified on the same scale. Fig. 8, a stamen, seen in front. Fig. 9, the same, seen 
sidewise: more magnified. Fig. 10, the pistil seated within the disk. Fig. 11, the 
same, seen from above, showing the cicatrices formed by the insertion of the stamens. 
Fig. 12, a longitudinal section of the same. Fig. 13, a transverse section of the same : 
all magnijied on the same scale. Figs. 14 &, 15, two ovules, or a solitary ovule in each 
cell, still more magnified. Fig. 16, a fruit. Fig. 17, a vertical section of the same. 
VOL. II. 2 o 
