502 
SUMMARY OF CURRENT RESEARCHES RELATING TO 
starch-grains ; in the quality of the odour of the flower ; in the time of 
flowering ; and in the capacity for resisting cold. 
A very striking illustration of this intermediate structure is afforded 
by the vascular bundle-sheath of the hybrid Philageria VeitcMi , which 
consists of eight or nine layers of cells ; while that of one of the 
parents, Lapageria rosea , consists of five, and that of the other parent, 
Philesia buxifolia , of eleven or twelve layers. 
The graft-hybrid Cytisus Adami does not present characters inter- 
mediate between those of the parents, but some characters of one, some 
of the other parent. 
The author distinguishes as “ unisexual heredity ” the property of 
transmitting a character possessed by one of the parents only. Thus, 
while Lajoageria rosea has nectaries on the sepals, and Philesia buxifolia 
has none, Philageria Veitchii has nectaries about half the size of those 
of Lapageria. In “ bisexual heredity ” properties belonging to each of 
the parents are transmitted. Thus Bibes Culverwellii has both the 
simple hairs of B. Grossularia and the oil-secreting hairs of B. nigrum. 
The author regards the nucleole as the essential carrier of hereditary 
properties ; from the nucleole radiate the chromatic filaments, and these 
pass into the cytoplasm, and probably form a reticulate connection 
between the separate cells. The plant may be regarded as a group of 
connected hermaphrodite cells, descended from a fertilized egg-cell, and 
bound together by a fine chromatic ramification, the centre of which in 
each cell is the nucleole. 
Cross and Self-pollination. — According to Miss Jane H. Newell* 
the stamens of the horse-chestnut, which are usually seven in number, 
open in succession ; the first flowers in an inflorescence are staminate, 
the later ones perfect and proterogynous. The change in colour of the 
nectar-guides, from yellow to bright crimson, appears to be for the 
purpose of indicating to the visiting insects that the flowers no longer 
contain nectar. The authoress believes, however, the flowers to be self- 
fertile. 
Dr. A. Magocsy-Dietz f states that (Enothera biennis is not only 
pollinated by night-flying insects, but is also self-pollinated. All the 
species of Forsythia grown in Hungary — F. suspensa , viridissima, and 
Fortunei , are heterostylous, but none of them produce seeds in that 
country, being but little visited by insects. M. Bruel * asserts that in 
F. suspensa and viridissima the structure favours self-pollination. 
Herr K. F. Jordan § describes the structure of the nectary in Fchium 
vidgare , and the mode in which its position aids in pollination by 
insects. 
According to Dr. Ida A. Keller, || pollination takes place within the 
unopened bud in Monarda fistulosa (Labiatae). Notwithstanding this, 
the flowers subsequently fully expand, and the stamens, and finally the 
style, are protruded. 
* Bot. Gazette, xviii. (1893) pp. 107-9. 
f Mathem. u. Naturwiss. Ber. aus Ungarn, ix. (1892) pp. 399-401 and 414. 
X Actes Soc. Linn. Bordeaux, xiv. p. 347 (1 pi.). See Bot Centralbl., liv. (1893) 
p. 114. 
S Ber. Deutsch. Bot. Gesell., x. (1893) pp 583-6 (5 figs.). 
ji Proc. Acad. Nat. Sci. Philadelphia, 1893, pp. 452-4 (1 pi.). 
