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The plant then flowers, producing fruits and seeds before it finally dies. There are far fewer biennials than either perennial plants or annual plants. [5] Biennials do not always follow a strict two-year life cycle and the majority of plants in the wild can take 3 or more years to fully mature.
This list also includes those perennials which are frequently treated as biennials, for reasons of climate or aesthetics. Wikimedia Commons has media related to Biennials . Pages in category "Biennial plants"
Oenothera gaura is a biennial plant, meaning it completes its life cycle over the course of two growing seasons, in which it will usually reach full maturity towards the end of the second growing season. It lives mostly in prairies throughout North America, and in dry, rocky places and deserts. It prefers sunny, dry areas, but has the ...
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Campanula americana, the American bellflower, [3] or tall bellflower, [4] is a bellflower native to eastern North America. Tall bellflowers can be annual or biennial with a varying life-history with seeds germinating in the fall producing annual plants and spring-germinating seeds producing biennial plants .
Oenothera biennis, the common evening-primrose, [3] is a species of flowering plant in the family Onagraceae, native to eastern and central North America, from Newfoundland west to Alberta, southeast to Florida, and southwest to Texas, and widely naturalized elsewhere in temperate and subtropical regions. [4]
[5] [6]: 224 Its leaves are hairy, but are greener than the typical gray wooly leaves of many alpine plants. [4]: 224 Western wallflower (Erysimum capitatum), a biennial or short-lived perennial,grows to 13,000 feet (4,000 m), and is also found in most other plant communities. [5] [6]: 123
Thomas Nuttall (1786-1859) described var. megacanthum as "one of the most terribly armed plants in the genus." [ 8 ] [ 9 ] Cirsium horridulum is a biennial herb up to 250 centimetres (100 in) tall, with a large taproot and fleshy side roots that sometimes sprout new shoots.