DESCRIPTION OF THE PLATES. 
and basal chalaza. Fig. 32, longitudinal section of the albumen, showing the enclosed 
embryo. Fig. 33, the embryo extracted : all magnified. Fig. 34, the embryo in two 
positions, more highly magnified. 
Plate 12. — Penxantia Cenninghaiii, in flower and in fruit. 
Fig. 1, a flower in bud, nat. size. Fig. 2, the same. Fig. 3, the same expanded. 
Fig. 4, the petals. Fig. 5, two of the stamens. Fig. 6, the pistil : all equally magnified. 
Fig. 7, a stamen, seen from behind. Fig. 8, the same, seen sideways. Fig. 9, an anther, 
seen in front, showing the separation of its lobes by the connective. Fig. 10, transverse 
section of the same. Fig. 11, a fllament. Fig. 12, the pistil supported by its disk on the 
torus. Fig. 13, the pistil removed. Fig. 14, longitudinal section of the same, showing 
two collateral suspended ovules. Fig. 15, one of the suspended ovules : all more or less 
magnified. Fig. 16, a fruit, nat. size. Fig. 17, the fruit seen from below, with half of 
the sarcocarp and of the putamen removed, sho^ving the remains of the two abortive cells, 
the basal chalaza, and the dorsal raphe. Fig. 18, its putamen. Fig. 19, longitudinal section 
of the same. Fig. 20, its enclosed seed, removed. Fig. 21, longitudinal section of the 
albumen. Fig. 22, the embryo extracted from it : all nat. size. Fig. 23, the same, mag- 
nified. Fig. 23 his, another fruit, which, contrary to the ordinary custom, is 2-ceUed. 
Fig. 24, the osseous putamen. Fig. 25, longitudinal section of the same, showing the two 
equal cells, and a seed in each cell, suspended by its strophiole from the summit of the 
tlun membranaceous dissepiment. Fig. 26, transverse section of the same, with the seeds 
removed, showing half of the dissepiment with the imbedded cord of the nourishing vessels 
which is left entire. Fig. 27, the cord, composed of the two strophioles, the nourishing 
vessels, and the third abortive cell, extracted from the middle of the dissepiment. Fig. 28, 
the two seeds removed ; all nat. size. 
Plate 13. — A. Stemontjkus axillaris. 
Fig. 1, a flower in bud, nat. size. Fig. 2, the same, magnified. Fig. 3, two of the 
petals, valvate in aestivation, with their apices deeply introflexed. Fig. 4, a stamen seen 
in front. Fig. 5, a fllament, with the anther removed, seen sideways and behind : all 
magnified. Fig. 6, grains of pollen, very highly magnified. Fig. 7, the pistil supported on its 
disk, magnified. Fig. 8, the same, seated in the calyx, half of which is cut away. Fig. 9, 
longitudinal section of the same, showing two ovules collaterally suspended from near the 
summit of the ceU : hoth more magnified. 
B. Stemonttrus Gaedneri. 
Fig. 1, a flower in bud, nat. size. Fig. 2, the calyx, magnified. Fig. 3, petals in difierent 
positions. Fig. 4, the stamens : all magnified. Fig. 5, stamens seen in three different 
positions. Fig. 6, a filament, seen before and behind. Fig. 7, the ovary : all more magnified. 
Fig. 8, the sessile stigmata, persistent on the summit of the fruit, magnified. Fig. 9, 
a fruit, nat. size. Fig. 10, the putamen, seen in three positions, to show the lateral 
channel containing the cord of nourishing vessels and two abortive cells : nat. size. Fig. 11, 
a longitudinal section of the putamen, with the seed removed, showing the groove in which 
the cord lies, and the foramen through which it passes. Fig. 12, the seed, with its dorsal 
raphe in connexion with the cord of nourishing vessels. Fig. 13, the same, seen on the 
dorsal face, with the cord removed, showing the singularly sub-peripheral course of the 
raphe. Fig. 14, the testa removed from the seed, showing its imbedded raphe. Fig. 15, 
the albumen with the integuments removed. Fig. 16, transverse section of the albumen. 
