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The earliest recorded observation of this behavior in plants dates back to 324 BC when Androsthenes of Thasos, a companion to Alexander the Great, noted the opening and closing of tamarind tree leaves from day to night. [15] Carl Linnaeus (1729) proposed that this was the plants sleeping, but this idea has been widely contested.
As a legume these plants fix nitrogen in the soil for other plants to use. [2] Beetles and a wide variety of other insects are attracted to the flowers. [2] The leaves are heavily browsed by game animals. [2] [3] Dalbergia obovata is an important foodplant for Dassies . [2] These plants also provide food for birds. [2]
The most important benefit of CAM to the plant is the ability to leave most leaf stomata closed during the day. [9] Plants employing CAM are most common in arid environments, where water is scarce. Being able to keep stomata closed during the hottest and driest part of the day reduces the loss of water through evapotranspiration , allowing such ...
Raw flat beans Raw flat beans showing the seeds Cooked flat beans with bacon. Flat beans, also known as helda beans, romano beans (not to be confused with the borlotti bean) and "sem fhali" in some Indian states, are a variety of Phaseolus vulgaris, known as runner bean (not to be confused with Phaseolus coccineus) with edible pods that have a characteristic wide and flat shape.
Mesophytes do not have any specific morphological adaptations. They usually have broad, flat and green leaves; an extensive fibrous root system to absorb water; and the ability to develop perennating organs such as corms, rhizomes and bulbs to store food and water for use during drought. [citation needed]
A pile of raw green beans. Green beans are young, unripe fruits of various cultivars of the common bean (Phaseolus vulgaris), [1] [2] although immature or young pods of the runner bean (Phaseolus coccineus), yardlong bean (Vigna unguiculata subsp. sesquipedalis), and hyacinth bean (Lablab purpureus) are used in a similar way. [3]
The leaves are grooved (canaliculate), smooth and linear with a white to light green linear midrib on the upper surface, and grow up to 30 centimetres (12 in) long and 8 mm (1 ⁄ 4 in) broad. [ 4 ] O. umbellatum is scapose , with a glabrous flower stem ( scape ) that emerges from the leaf tufts later and is about 10–30 cm (4–12 in) in ...
Its leaves slowly close during the night and during periods of rain, the leaflets bowing downward; thus its modern Persian name shabkhosb (شبخسب) means "night sleeper". This tendency also explains the Chinese common name hehuan , which means "shut happy" and symbolizes a happy couple in bed. [ 3 ]