Annonaceae - Annonaceae

Soursop Family

Cymbopetalum costaricense (Donn. Sm.) Saff., an understory tree in the Annonaceae. Note the distichous leaf arrangement and the conduplicate young leaf. A tree of the sub-soil. Note the leafy leaves and young leaf conduplicada.

Description: The Annonaceae are mainly trees, with a few lianas. They have simple, alternate, entire leaves with no stipules. In almost all species here, the leaves are distichous (borne in one plane), and the young leaves are conduplicate (i.e., folded in half lengthwise). The crushed leaves have a strong odor, which varies from fruity to unpleasantly sour. The bark is very strong, often peeling down the trunk when you attempt to remove a twig. The underside of the bark has a netted pattern, also visible in the wood, and the stem cross section has abundant rays, resembling a bicycle wheel.

Economic uses: Native people of the Amazon and Central America often use Annonaceae bark for twine because of their strength and flexibility. Some Annonaceae are widely cultivated in the tropics for their fruit: cherimoya (Annona cherimola), guanabana or soursop (Annona muricata), and several other local varieties. An Annonaceae fruit that grows wild in the mountains of the Southeastern U.S., the pawpaw (Asimina triloba) is considered a delicacy. The flowers of Cananga odorata ​​i> are a main ingredient in Chanel No. 5.

Economic uses: Amazon and Central American Indians use the annonaceous bark to make rope, due to their strength and flexibility. Some species of annonaceas are widely cultivated: anona or cherimoya (Annona cherimola), guanabana (Annona muricata), and other varieties. In the southeastern mountains of the United States, "pawpaw" (Asimina triloba) grows, a wild fruit that is considered delicious. The flowers of Cananga odorata ​​i> (ylang-ylang) are used to make Chanel perfume No. 5.

Genera / species at La Selva: 10 / 20 (all shrubs and trees): Anaxagorea (2), Annona (3), Cananga (1), Cymbopetalum (2), Desmopsis (2), Guatteria (3), Rollinia (2), Sapranthus (1), Unonopsis (2), Xylopia (2).

FIELD MARKS - alternate, simple leaves, distichous (leaves in two ranks) , young leaves conduplicate odor, bark peels in long strings , threadlike vascular bundles visible in live bark, aggregate fruit or free fruitlets.

Annonaceae with alternate leaves in two ranks and stringy bark.

Distichous (2-ranked) leaf arrangement.

Anaxagorea crassipetala with alternate distichous leaves.

Rusty (ferruginous) coloration on young twigs is characteristic of the species. Anaxogorea showing alternate leaves and rusty coating on

young twigs. Note how the youngest leaves are folded and the youngest are lighter in color than mature leaves. Cymbopetalum torulosum with alternate distichous leaves on short

petioles and a cluster of fruits originating from a single flower (apocarpous gynoecium).

Guatteria amplifolia branch tip with alternate distichous leaves with looped veins, folded (conduplicate) young leaf, and green stem.

Guatteria amplifolia branch bearing alternate distichous leaves and yellow flowers.

Guatteria with characteristic 3-plan to the flowers

Guatteria amplifolia bears clusters of small fruit with red stalks.

Aggregate fruit and old flower parts of Annonaceae.

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