Abstract
Morphology of the seeds and seedlings ofEuphorbia hirta andE. thymifolia are described. In both the species, the seeds are endospermous, exotegmic, more or less oblong and obtusely tetragonal. The testa is only two-layer thick, collapsing when dry; the tegmen is made up of a single layer of macrosclereids with occluded lumen. The early developmental pattern of the seedlings in both the species is the same. The first internode is condensed and the first pair of leaves develop in a decussate fashion to the cotyledonary leaves. Early in the development of young seedlings, 4–5 extra-axillary branches originate at the first leafy node. These branches inE. thymifolia lead to the rosette form of mature plant whereas inE. hirta these branches are eliminated and an erect plant is the result and branches from the main axis develop only subsequently. The nature of the seedlings are correlated with the ecology of the plants.
Published Version
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