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Rhamnaceae:

This family contains about 900 species in 55 genera. They are mostly trees or shrubs. There are very few plants in this family that are used commercially.


Systematics: This family is very closely related to the Celastraceae. They differ in having stamen that are opposite to the petals. They have in common a 5-lobed calyx and a 5-clawed corolla. The ovary is superior and contains a nectariferous disk, that surrounds the superior ovary making it look inferior. This is a prominent feature of the family. The gynecium has 1 pistil and 2,3 carpels.

Specimens List

Buckthorns (Rhamnus spp)

There are about 100 species of buckthorn, many of which are invasive in the United States.



Floral Diagram


Jujube tree (Ziziphus zizyphus)

This is a major fruit in China.


Crown of Thorns (Paliurus spina-christi)

The name reflects the belief that this plant was used as the 'thorns' placed over Christ's head before his crucifixion.


Japanese Raisin Tree (Hovenia dulcis)

Produces fruits that look and taste just like raisins. Native to Japan, Eastern China, and the Himalayas.


 

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