The second leaf pair consist of three leaflets per leaf, the third leaf pair has five leaflets per leaf, and so on, up to eleven leaflets per leaf.Anderson Avenue, Manhattan, eastern Kansas, USA.
![]() Johnvia flickr - CC BY 2.0 Title Flowering plant Caption Cannabis sativa (hemp); flowering habit. Bhutan. Copyright Chris ParkerBristol, UK Flowering plant Cannabis sativa (hemp); flowering habit. Bhutan. Chris ParkerBristol, UK Title Flowers Caption Cannabis sativa (hemp); male flowers. Copyright Chris ParkerBristol, UK Flowers Cannabis sativa (hemp); male flowers. Chris ParkerBristol, UK Title Flowers Caption Cannabis sativa (hemp); female flowers. Copyright Public Domain - Released by Erik Fendersonvia wikipedia Flowers Cannabis sativa (hemp); female flowers. Public Domain - Released by Erik Fendersonvia wikipedia Title Leaves Caption Cannabis sativa (hemp); leaves of var. Indica plants. Himachal Pradesh, India. June 2009. Copyright Miran Rijavecvia flickr - CC BY 2.0 Leaves Cannabis sativa (hemp); leaves of var. June 2009. Miran Rijavecvia flickr - CC BY 2.0 Title Seedling Caption Cannabis sativa (hemp); seedling. Copyright Avriettevia wikipedia - CC BY-SA 3.0 Seedling Cannabis sativa (hemp); seedling. Habit, along roadside at the edge of upland deciduous forest. Vicinity of Saratov city, Russia. June 2011. Copyright Le.Loup.Grisvia wikipedia - CC BY-SA 3.0 Wild hemp Cannabis sativa (hemp); wild marijuana (Cannabis sativa var. June 2011. Le.Loup.Grisvia wikipedia - CC BY-SA 3.0 Title Seeds Caption Cannabis sativa (hemp); seeds. Copyright Public Domain - Released by Jorge Barriosvia wikipedia Seeds Cannabis sativa (hemp); seeds. In his original 1753 classification, Carl Linnaeus identified just one species, Cannabis sativa. Lamarck (1785) determined that Cannabis strains from India were distinct from the common hemp of Europe, based on stem and leaf morphology, and named the new species C. Lam. In a detailed review of the cannabis taxonomy problem Small and Cronquist (1976) returned to the monotypic view, defining a single highly variable species C. Others continue with the polytypic view, with two or more additional species such as C. C. ruderalis and C. Schultes et al., 1974; McPartland et al., 2000; Hillig, 2005; McPartland, 2017 ). McPartland et al. C. indica is misnamed C. Since the 1940s, fibre hemp breeders have been reducing the THC content ( Bocsa and Karus, 1997 ). Conversely, breeders of drug Cannabis have been increasing the THC content ( Szendrei, 1997 ). Cannabis segregates can interbreed and hybridize, as shown by X C. The seeds (achenes) are round to nearly lens-shaped, with a round base, surface green-brown to grey, marbled or unmarbled, with or without an abscission layer at the base, ranging in size from 1.5 to 4 mm long. Young seedlings produce a pair of cotyledons, which are fleshy, somewhat oval (narrowed at the sessile base), with an entire margin. Cotyledons are followed by the first pair of true leaves, which are coarsely serrate, long, lanceolate, with a dark green upper surface and whitish-green lower surface. During the early vegetative stage, seedlings form up to five true leaf pairs, oppositely arranged, with short internodes. The first true leaves are single leaflets, thereafter, leaves become palmately compound.
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