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Further versions appeared in 1959 (Die Evolution der Angiospermen) and 1966 (Sistema i filogeniia tsvetkovykh rastenii). [1] The latter popularised Takhtajan's system when it appeared in English in 1969 (Flowering plants: Origin and dispersal). A further revision appeared in 1980. [2] [3]
Cannabis grown is induced into flowering by decreasing its photoperiod to at least 10 hours of darkness per day. In order to initiate a flowering response, the number of hours of darkness must exceed a critical point. Generally the more hours of darkness each day, the shorter the overall flowering period but the lower the yield.
Autoflowering cannabis or day neutral cannabis varieties automatically switch from vegetative growth to the flowering stage based on age, as opposed to the ratio of light to dark hours required with photoperiod dependent/short-day strains. Many autoflowering varieties are ready to harvest in less than 10 weeks from seed.
These strains of cannabis are believed to have originated during the early 1980s in the United States prior to larger-scale development and popularization by Dutch growers. [45] Just as with other strains of cannabis, skunk is commonly grown in controlled indoor environments under specialized grow lights, or in a greenhouse when full outdoor ...
"High Times #1 made its debut at the June 1974 show and was an instant success, selling out its first run of 10,000 copies and getting reprinted twice." [ 1 ] The magazine's first editor was Ed Dwyer, who had earlier written the text of the Woodstock music festival program booklet (as well as the Woodstock film program booklet). [ 18 ]
In the flowering plants, the gynoecium develops in the central region of the flower as a carpel or in groups of fused carpels. [4] After fertilization, the gynoecium develops into a fruit that provides protection and nutrition for the developing seeds, and often aids in their dispersal. [5] The gynoecium has several specialized tissues. [6]
The strain has been combined with the White Widow strain to produce White Russian cannabis, a plant with "a pleasantly sweet aroma" and a "long lasting effect". [17] The Chronic strain of cannabis is a cross of AK-47 with Northern Lights and Skunk #1. [16] The Cherry AK phenotype is occasionally produced by AK-47 plants. [14]
Fertilisation of Orchids is a book by English naturalist Charles Darwin published on 15 May 1862 under the full explanatory title On the Various Contrivances by Which British and Foreign Orchids Are Fertilised by Insects, and On the Good Effects of Intercrossing. [1] Darwin's previous book, On the Origin of Species, had briefly mentioned ...