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Onion bulb begins to elongate 53: 503: 30% of the expected length of flower stem reached 55: 505: Flower stem at full length; sheath closed 57: 507: Sheath burst open 59: 509: First flower petals visible; flowers still closed 6: Flowering 60: 600: First flowers open (sporadically) 61: 601: Beginning of flowering: 10% of flowers open 62: 602: 20 ...
Allium flavum (yellow) and Allium carinatum (purple). Allium is a large genus of monocotyledonous flowering plants with around 1000 accepted species, [4] [5] making Allium the largest genus in the family Amaryllidaceae and amongst the largest plant genera in the world. [6]
Onions are a cool-weather crop and can be grown in USDA zones 3 to 9. [67] Hot temperatures or other stressful conditions cause them to "bolt", meaning that a flower stem begins to grow. [68] Onions are grown from seeds or from partially grown bulbs called "sets" or starter bulbs. Onion seeds are short-lived and fresh seeds germinate more ...
Allium schubertii, which has various common names including ornamental onion, flowering onion, tumbleweed onion and Persian onion, is a species of monocotyledonous flowering plant. It belongs to the onion and garlic genus , in the subfamily Allioideae of the family Amaryllidaceae .
Allium fistulosum, the Welsh onion, also commonly called bunching onion, long green onion, Japanese bunching onion, and spring onion, is a species of perennial plant, often considered to be a kind of scallion. The species is very similar in taste and odor to the related common onion, Allium cepa, and hybrids between the two (tree onions) exist.
Virescence is the abnormal development of green pigmentation in plant parts that are not normally green, like shoots or flowers (in which case it is known as floral virescence). [1] Virescence is closely associated with phyllody (the abnormal development of flower parts into leaves ) and witch's broom (the abnormal growth of a dense mass of ...
The tree onion (Allium × proliferum) is a perennial plant similar to the common onion (A. cepa), but with a cluster of bulblets where a normal onion would have flowers. Tree onions are also known as topsetting onions , walking onions , or Egyptian onions .
Allium vineale (wild garlic, onion grass, crow garlic or stag's garlic) is a perennial, bulb-forming species of wild onion, native to Europe, northwestern Africa and the Middle East. [2] The species was introduced in Australia and North America , where it has become an Invasive species .