陽光對於印度田青生長與發展之研究

The study on the effect of light to the development and growth of Sesbania Sesban

Sesbania is a genus belonging to the family Leguminosae and sub-family Papilionaceace, consisting of about 20 species of both annual and perennial plants, and distributing over the old world tropics from Himalaya, Ceylon, Siam and eastward to the southern part of Formosa. While Formosa, being for the most part a sub-tropical country. is a marginal territory of its natural distribution. The botanical characters of the species S. sesban, Merr. According to Dr. E. D. Merrill. that S. sesban is a small tree or shrub of 6-15 ft. tall, with 21-41 glabrous, linear oblong, obtuse mucronate, and abruptly pinnated leaf-lets; flowers 6-10 in copious lax axillary racemes; pedicels filiform 1/6-1/4 inch; Calyx glabrous membranaceous, short teethed, deltoid; Corolla 1/2-3/4 inch, glabrous, pale yellow purple, more or less tinged with deep red; petals with long claws, standard broad, keel obtuse, straight or recurved and subrostrate; Stamens diadelphous; Anthers uniform; Ovary linear, stipitate, many-ovuled; Style filiform, incurved. glabrous; Srigima capitate; Pod 6-9 inches long twisted and pendulous, narrow dehiscent, with distinct septa between the very numerous seeds, and sutures little thickened.