S: (n) stipule (a small leafy outgrowth at the base of a leaf or its stalk; usually occurring in pairs and soon shed)
S: (n) tepal (an undifferentiated part of a perianth that cannot be distinguished as a sepal or a petal (as in lilies and tulips))
S: (n) gynostegium (the crown of the stamen in plants of the genus Asclepias)
S: (n) chalaza (basal part of a plant ovule opposite the micropyle; where integument and nucellus are joined)
S: (n) nucellus (central part of a plant ovule; contains the embryo sac)
S: (n) germ tube ((botany) a slender tubular outgrowth from a spore in germination)
S: (n) pollen tube ((botany) a slender tubular outgrowth from a pollen grain when deposited on the stigma for a flower; it penetrates the style and conveys the male gametes to the ovule)
S: (n) mentum (a projection like a chin formed by the sepals and base of the column in some orchids)
S: (n) corona ((botany) the trumpet-shaped or cup-shaped outgrowth of the corolla of a daffodil or narcissus flower)
S: (n) lip ((botany) either of the two parts of a bilabiate corolla or calyx)
S: (n) mycelium (the vegetative part of a fungus consisting of a mass of branching threadlike hyphae)
S: (n) plant organ (a functional and structural unit of a plant or fungus)
S: (n) aril (fleshy and usually brightly colored cover of some seeds that develops from the ovule stalk and partially or entirely envelops the seed)
S: (n) duct (a continuous tube formed by a row of elongated cells lacking intervening end walls)
S: (n) veil, velum (a membranous covering attached to the immature fruiting body of certain mushrooms)
S: (n) annulus, skirt ((Fungi) a remnant of the partial veil that in mature mushrooms surrounds the stem like a collar)
S: (n) stock (a plant or stem onto which a graft is made; especially a plant grown specifically to provide the root part of grafted plants)
S: (n) receptacle (enlarged tip of a stem that bears the floral parts)
S: (n) kernel, meat (the inner and usually edible part of a seed or grain or nut or fruit stone) "black walnut kernels are difficult to get out of the shell"
S: (n) lobe ((botany) a part into which a leaf is divided)
S: (n) ligule ((botany) any appendage to a plant that is shaped like a strap)