During the process of fertilization in the Angiosperms it has been shown by the researches of Nawaschin and Guignard that in Lilium and Fritillaria both generative nuclei enter the embryo sac, one fusing with the oosphere nucleus, the other with the polar nuclei (fig.
A more important work, the Practica seu lilium medicinae, of Bernard Gordon, a Scottish professor at Montpellier (written in the year 1307), was more widely spread, being translated into French and Hebrew, and printed in several editions.
The word Xeipcov itself, from which lilium is derived by assimilation of consonants, appears to be Eranian (Ibid.
The edges of the leaves of Bryophyllum calycinum and of Cardamine pratensis, and the growths in the axils of the leaves of Lilium bulbiferum, as well as the fronds of certain ferns (e.g.
They are present from the beginning of the development of the cell-wail, and arise from the spindle fibres, all of which may be continued as connecting threads (endosperm of Tamus communis), or part of them may be overlaid by cellulose lamellae (endosperm of Lilium Martagon), or they may be all overlaid as in pollen mother-cells and pollen grains of Helleborus foetidus.
Agriculture is spreading but slowly among them; they still prefer to plunder the stores of bulbs of Lilium Martagon, Paeonia, and Erythronium Dens canis laid up by the steppe mouse (Mus socialis).
Xxiii.; Fecundation in Plants (Carnegie Institution, 1904); Nawaschin, Resultate einer Revision der Befruchtungsvorgange bci Lilium Martagon und Fritiliaria tenelia, Bull.
LTTERATURE.The following is a list of a few of the more important papers in which further information and a more complete list of literature will be found: Allen, Nuclear Division in the Pollen Mother-cells of Lilium canadense, Annals of Botany (1905), vol.
Uromyces Erythronii, a rust, sometimes causes considerable injury to the foliage of species of Lilium and other bulbous plants, forming large discoloured blotches on the leaves.
The typical genus Lilium and Fritillaria are widely distributed in the temperate regions of the northern hemisphere; F.