STUDIES IN PLANT REGENERATION 295 
which did not appear again in this or in either of the other parts. 
In a similiar trial with peduncles of Bryophyllum crenatum, only 
the lowest of the three parts rooted, and no shoot was produced. 
Experiment 45.— Ruellia rosea has an inflorescence of a differ- 
ent type. The peduncle is green and slightly flattened, without 
leaves. In the seventeen months in which the parts remained 
alive, they regenerated an ample root-system, but nothing further. 
REGENERATION IN FRUITS 
Few instances of regeneration in fruits have been recorded. 
In some of these the fruits are of the type of Opuntia where the 
stem is incorporated in the fruit.* Roots 
have also been reported on the capsule of 
Lilium speciosum.t Two additional green 
fruits proved, in these experiments, to have 
the faculty of producing roots. 
Experiment 46. — Half-grown pods of 
yellow bush bean and lima beans were placed 
with their pedicels in sand. From the end 
of this stalk a callus was formed, and roots 
grew through this in three weeks (Fig. 12). 
In only one or two cases did the regenerated 
organ enable the pod to mature its seeds, 
Ordinarily the ripening was effectually pre- 
vented by the processes of decay which set in 
shortly after the roots were formed and even- 
tually killed the part. Roots sometimes 
started from the stem above the callus, in- 
stead of growing through it, so that it is to i 
be presumed that both sorts of origin are Fic. 12. Pod of Pha- 
possible here as in the leaf. It must be ad- sen aep іна 
mitted that this kind of regeneration is fun- ua ал ири н 
damentally like that of an inflorescence. That 
there is a difference, however, was shown by the following com- 
parison. 
‚ с. 110; also Hildebrand, Е. Uber Bildung von Laubsprossen aus 
Bluthensprossen bei Opuntia. Ber. Deut. Bot. Ges. 6: 109. 1888. 
T iere Un Fruit qui s'enracine. Rev. Hort. 49: 207. 1877. 
