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The Seed of the Spider Lily, Hymenocallis Occidentalis

Muriel R. Whitehead and Clair A. Brown
American Journal of Botany
Vol. 27, No. 4 (Apr., 1940), pp. 199-203
Stable URL: http://www.jstor.org/stable/2436880
Page Count: 5
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The Seed of the Spider Lily, Hymenocallis Occidentalis
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Abstract

The seed of the spider lily is composed of two succulent integuments, a small amount of nucellar tissue, and an embryo. The succulent seeds are shed from the ovary by enlarging and splitting the ovary wall. The embryo is "incomplete" at the time of shedding, but over a period of three weeks the embryonic sporophyte may develop into an elongate structure consisting mainly of cotyledon, with a small hypocotyledonary region. The development of the sporophyte is apparently supported by the carbohydrates elaborated by the chlorenchymatous integument and by the sugar and proteins stored therein. Further evidence to support the functional activity of chlorenchymatous tissue is the presence of stomates in the epidermal layer surrounding the seed along with the increase in weight of the seeds. The vascular tissue of the ovule is rather extensive and well developed, a feature reported for very few seeds.

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