Distinguish character of Magnoliaceae and Cucurbitaceae



Unlike most angiosperms, whose flower parts are in rings, the Magnoliaceae have their stamens and pistils in spirals on a conical receptacle. This arrangement is found in some fossil plants and is believed to be a basal or early condition for angiosperms. The flowers also have parts not distinctly differentiated into sepals and petals, while angiosperms that evolved later tend to have distinctly differentiated sepals and petals. The poorly differentiated perianth parts that occupy both positions are known as tepals.

The family has approximately 225 species in 7 genera, although some classification systems include all of subfamily Magnoioideae in genus Magnolia. The family ranges across eastern North America, Mexico and Central America, the West Indies, tropical South America, southern and eastern India, Sri Lanka, Indochina, Malesia, China, Japan, and Korea.

The monopoly of Magnoliaceae is supported by a number of shared morphological characters among the various genera included in the family. Most have flowers that are bisexual (with the exception of Kmeria and some species of Magnolia section Gynopodium), radial, and with an elongate receptacle. Leaves are alternate, simple, and sometimes lobed.

The inflorescence is a solitary, showy flower with indistinguishable petals and sepals. Sepals range from six to many; stamens are numerous and feature short filaments which are poorly differentiated from the anthers. Carpels are usually numerous, distinct, and on an elongate receptacle. The fruit is an aggregate of follicles which usually become closely apprised as they mature and open along the abaxial surface. Seeds have a fleshy coat and color that ranges from red to orange (except Liriodendrori).

Magnoliaceae flowers are beetle pollinated, except for Liriodendron, which is bee pollinated. The carpels of Magnolia flowers are especially thick to avoid damage by beetles who, land, crawl, and feast on them. The seeds of Magnolioideae are bird dispersed while the seeds of Liriodendron are wind dispersed.

Cucurbitaceae is a plant family commonly known as melons, gourds or cucurbits and includes crops like cucumbers, squashes (includingpumpkins), luffas, melons (including watermelons). The family is predominantly distributed around the tropics, where those with edible fruits were amongst the earliest cultivated plants in both the Old and New Worlds. The Cucurbitaceae family has 825 species in 118- 119 genera. This is the family that contains all the edible gourds, such as cucumbers, watermelon, musk melons, squash, and pumpkins.

Most of the plants in this family are annual vines but there are also woody lianas, thorny shrubs, and trees (Dendrosicyos). Many species have large, yellow or white flowers. The stems are hairy and pentangular. Tendrils are present at 90° to the leaf petioles at nodes. Leaves areexstipulate alternate simple palmately lobed or palmately compound. The flowers are unisexual, with male and female flowers on different plants (dioecious) or on the same plant (monoecious). The female flowers have inferior ovaries. The fruit is often a kind of modified berry called apepo.