Prunus subg. Prunus
| Plum | |
|---|---|
 |
|
| A plum; whole and split | |
 |
|
| Black Amber Plum | |
| Scientific classification | |
| Kingdom: | Plantae |
| (unranked): | Angiosperms |
| (unranked): | Eudicots |
| (unranked): | Rosids |
| Order: | Rosales |
| Family: | Rosaceae |
| Subfamily: | Amygdaloideae |
| Genus: | Prunus |
| Subgenus: | Prunus |
| Species | |
|
See text. |
|
| Nutritional value per 100 g (3.5 oz) | |
|---|---|
| Energy | 192 kJ (46 kcal) |
|
11.42 g
|
|
| Sugars | 9.92 g |
| Dietary fiber | 1.4 g |
|
0.28 g
|
|
|
0.7 g
|
|
| Vitamins | |
| Vitamin A equiv. |
(2%)
17 μg
(2%)
190 μg73 μg
|
| Thiamine (B1) |
(2%)
0.028 mg |
| Riboflavin (B2) |
(2%)
0.026 mg |
| Niacin (B3) |
(3%)
0.417 mg |
| Pantothenic acid (B5) |
(3%)
0.135 mg |
| Vitamin B6 |
(2%)
0.029 mg |
| Folate (B9) |
(1%)
5 μg |
| Vitamin C |
(11%)
9.5 mg |
| Vitamin E |
(2%)
0.26 mg |
| Vitamin K |
(6%)
6.4 μg |
| Minerals | |
| Calcium |
(1%)
6 mg |
| Iron |
(1%)
0.17 mg |
| Magnesium |
(2%)
7 mg |
| Manganese |
(2%)
0.052 mg |
| Phosphorus |
(2%)
16 mg |
| Potassium |
(3%)
157 mg |
| Sodium |
(0%)
0 mg |
| Zinc |
(1%)
0.1 mg |
| Other constituents | |
| Water | 87 g |
|
|
|
|
|
| Percentages are roughly approximated using US recommendations for adults. Source: USDA Nutrient Database |
|
See text.
A plum is a fruit of the subgenus Prunus of the genus Prunus. The subgenus is distinguished from other subgenera (peaches, cherries, bird cherries, etc.) in the shoots having terminal bud and solitary side buds (not clustered), the flowers in groups of one to five together on short stems, and the fruit having a groove running down one side and a smooth stone (or pit).
Mature plum fruit may have a dusty-white waxy coating that gives them a glaucous appearance. This is an epicuticular wax coating and is known as "wax bloom". Dried plum fruits are called dried plums or prunes, although, in American English, prunes are a distinct type of plum, and may have pre-dated the fruits now commonly known as plums.
Plums are a diverse group of species. The commercially important plum trees are medium-sized, usually pruned to 5–6 metres height. The tree is of medium hardiness. Without pruning, the trees can reach 12 metres in height and spread across 10 metres. They blossom in different months in different parts of the world; for example, in about January in Taiwan and early April in the United Kingdom.
Fruits are usually of medium size, between 1 and 3 inches in diameter, globose to oval. The flesh is firm and juicy. The fruit's peel is smooth, with a natural waxy surface that adheres to the flesh. The plum is a drupe, meaning its fleshy fruit surrounds a single hard seed.
Plum has many species, and taxonomists differ on the count. Depending on the taxonomist, between 19 and 40 species of plum exist. From this diversity only two species, the hexaploid European plum (Prunus domestica) and the diploid Japanese plum (Prunus salicina and hybrids), are of worldwide commercial significance. The origin of these commercially important species is uncertain but may have involved P. cerasifera and possibly P. spinosa as ancestors. Other species of plum variously originated in Europe, Asia and America.
The subgenus Prunus is divided into three sections:
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