Two kinds of drug-type Cannabis gained layman's terms in the 1980s. "Sativa" had origins in South Asia (India), with early historical dissemination to Southeast Asia, Africa, and the Americas. "Indica" had origins in Central Asia (Afghanistan, Pakistan, Turkestan). We have assigned unambiguous taxonomic names to these varieties, after examining morphological characters in 1100 herbarium specimens, and analyzing phytochemical and genetic data from the literature in a meta-analysis. "Sativa" and "Indica" are recognized as C. sativa subsp. indica var. indica and C. sativa subsp. indica var. afghanica, respectively. Their wild-growing relatives are C. sativa subsp. indica var. himalayensis (in South Asia), and C. sativa subsp. indica var. asperrima (in Central Asia). Natural selection initiated divergence, driven by climatic conditions in South and Central Asia. Subsequent domestication drove further phytochemical divergence. South and Central Asian domesticates can be distinguished by tetrahydrocannabinol and cannabidiol content (THC/CBD ratios, ≥7 or <7, respectively), terpenoid profiles (absence or presence of sesquiterpene alcohols), and a suite of morphological characters. The two domesticates have undergone widespread introgressive hybridization in the past 50 years. This has obliterated differences between hybridized "Sativa" and "Indica" currently available. "Strains" alleged to represent "Sativa" and "Indica" are usually based on THC/CBD ratios of plants with undocumented hybrid backgrounds (with so-called "Indicas" often delimited simply on possession of more CBD than "Sativas"). The classification presented here circumscribes and names four taxa of Cannabis that represent critically endangered reservoirs of germplasm from which modern cannabinoid strains originated, and which are in urgent need of conservation.

中文翻译：

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濒临灭绝的高四氢大麻酚大麻（印度大麻亚种）驯养动物及其野生近缘种。

两种毒品类型的大麻在1980年代获得了外行的称呼。“苜蓿”起源于南亚（印度），历史悠久地传播到东南亚，非洲和美洲。“印度”起源于中亚（阿富汗，巴基斯坦，土耳其斯坦）。在检查了1100个标本室的标本的形态特征并在荟萃分析中分析了文献中的植物化学和遗传数据之后，我们为这些变种指定了明确的分类学名称。“苜蓿”和“ In稻”被认为是苜蓿C. sativa亚种。印度变种 and和苜蓿亚种。印度变种 阿富汗。他们的野生近缘种是C. sativa subsp。印度变种 喜马拉雅山（在南亚）和苜蓿C. sativa亚种。印度变种 asperrima（在中亚）。自然选择引发分歧，受南亚和中亚的气候条件驱动。随后的驯化进一步推动了植物化学差异。南亚和中亚的家畜可以通过四氢大麻酚和大麻二酚含量（THC / CBD比率，分别≥7或<7），萜类化合物特征（无倍半萜烯醇存在或不存在）以及一系列形态学特征来区分。在过去的50年中，这两种驯养动物经历了广泛的渐渗杂交。这消除了目前可用的杂交“苜蓿”和“ In稻”之间的差异。据称代表“苜蓿”和“ In稻”的“品系”通常是基于具有无证杂种背景的植物的THC / CBD比值（所谓的“ Indicas”通常仅因拥有比“