Achene: A small, dry, indehiscent one-seeded fruit with a thin wall

Cyme: A flower cluster in which the main axis and each branch end in a flower that opens before the flowers below or to the side of it (See Inflorescence).

Hypanthium: A tube-like floral structure consisting of the fused bases of the sepals, petals and stamens; includes the area from the ovary wall (at the end farthest from the stem) to the point of transition of the sepals from fused to free. Its presence is diagnostic of many families, including the Rosaceae, Grossulariaceae, and Fabaceae. In some cases, it can be so deep, with such a narrow top, that the flower can appear to have an inferior ovary (Wikipedia).

Panicle: A branched cluster of flowers in which the branches are racemes (See Inflorescence).

Phyllary: One of the involucral bracts subtending the flower head of a composite plant

Raceme: A simple inflorescence in which the flowers are borne on short stalks of about equal length at equal distances along an elongated axis and open in succession toward the apex

Serotiny. An ecological adaptation exhibited by some seed plants, in which seed release occurs in response to an environmental trigger, rather than spontaneously at seed maturation. The most common and best studied trigger is fire, and the term serotiny is often used to refer to this specific case. The key adaptations of fire-induced serotiny are a cone or woody fruit that provides protection from the heat of fire, together with a mechanism by which the passage of a fire can trigger seed release. Typically this mechanism is a resin that seals the fruit or cone scales shut, but which melts when heated (Wikipedia).

Sex in plants

Dioecious (Noun: Dioecy): Separate male (staminate) and female (pistillate) plants

Monoecious (Noun: Monoecy): Male (staminate) and female (pistillate) flowers on the same plant

Several types of hermaphroditism exist, as shown in this diagram from Avise, J.C.  2011.  Hermaphroditism: A Primer on the  Biology, Ecology, and Evolution of Dual Sexuality.  Columbia University Press, New York.



Stigma and Style

Tomentose: having short, soft, woolly, matted or tangled hairs.

Tube: in calyces or corollas with fused sepals or petals, the often more or less cylindric fused portion at the base, proximal to the throat and limb.