Volume 49, Issue 1
January 1959, pages 1-85
pp 1-6 January 1959
pp 7-51 January 1959
pp 52-65 January 1959
The vascular anatomy of the flower in general is uniform in all the species ofPiper studied. A flower is always supplied by a single branch that gives out first a trace to the bract. The remaining vascular supply gives out traces to the stamens or staminodes when present and then supplies the gynæceum. Only in some species likeP. Tucumanum adnation of the stamen traces and in the female flowers ofP. longum of the bract trace with the carpellary dorsals, has been observed. The gynæceum supply splits up at its base into three dorsals and one ventral strand. Secondary laterals are observed only in three species. InP. longum the dorsals are seen fusing below the stigmas otherwise they directly supply them.
Embryology inP. Gaudichaudianum has been studied and it is concluded that it followsFritillaria-type as in other species ofPiper.
pp 66-73 January 1959
pp 74-81 January 1959
1.Aholcus euproctiscidis Mani is an important egg parasite ofEuproctis lunata Walker, which is a serious pest of castor.
2. Freshly laid host eggs are preferred by the parasites for oviposition.
3. Usually only one egg is laid in a host egg by the parasite. In any case only one individual completes development and emerges successfully.
4.The first instar larva differs from those of other Scelionidæ, whose life-cycle has been worked out, in not possessing antennal processes and in having two caudo-ventral horns. Only one caudo-ventral horn was observed in others.
5. A definite second instar larva is present.
6. The third instar larva has a well segmented body, a well developed tracheal system and 8 pairs of functional spiracles.
pp 82-85 January 1959
The floral anatomy ofPothomorphe umbellata is described. The bract trace and the floral trace arise conjoint. At the base of the flower the floral trace branches into three compound bundles which bifurcate into a total of six bundles. Two of these are obviously the stamen traces, another is the ventral (or placental) strand which supplies the ovular trace. The remaining three bundles have been interpreted as dorsal bundles of the carpels and hence the gynæceum has been interpreted as tricarpellary. As the ovule receives its supply from one side and not from the base it is considered to be lateral rather than basal.