Credit to Brian Coldwell and his nice website --
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Thai –
Thai landrace strains are pure Sativas with historic importance as the cannabis of choice for breeders seeking to add potent and unique genetics to their programs. Indigenous Thai cannabis strains are found to be uniform and, in general, characteristics include: tall plants with many branches and leaves with long, 9 to 11 inch serrated leaflets, susceptibility to hermaphroditism, sweet, aromatic flowers with elongated calyxes, low CBD levels, and high production levels of resinous, psychoactive THC (14% to 24% THC), and a terpene profile that includes Caryophyllene – “Pepper”, Humulene – “Hops”, Pinene – “Pine” and Terpinolene – “Wood”. As a pure Sativas, Thai landrace cannabis strains produce highs that are stimulating, head-centered, energizing and euphoric. For medicinal uses, patients prefer Thai strains for depression, stress, and headaches.
One famous Thai landrace cannabis strain was called “Chocolate Thai”, which first made an appearance in the U.S. sometime in the 1960s as “Thai sticks,” spindly flowers tied to a bamboo stick that were renowned for their potent high. These buds were slender and airy, medium-to-dark brown in color, and possessed both a unique chocolate-coffee aroma and a distinct chocolate flavor. Thanks to the combination of its flavor, coffee-colored buds, and a cerebral high, the strain was very popular until the 1980s. Eventually, the strain’s popularity began to fade due to its lower THC level and difficulty to grow, with 10% THC as a high-rated sample and seeds not only being difficult to germinate, but also tending to die easily or become hermaphroditic. Because of these difficulties, some claim that true Chocolate Thai genetics went extinct in the mid-to-late 1980s. Chocolate Thai’s special effect is its burst of creativity and focus, and the high is amazing for anyone in need of inspiration...."
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