Anatomy of Cannabis: Difference between revisions

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====Petiole ====
[[File:Petiole.png|thumb|325x325px]]
The stalk connecting the leaf to the stem. Petioles and stems may turn purple due to light exposure. As a result, typically the underside is less purple than the upper side.
 
==== Apex====
 
====Ventral surface ====
UpperThe upper side of the leaf.
 
====Dorsal surface ====
The under sideunderside of a leaf.
 
==== Margin ====
The outer perimeter or edge of a leaf. Cannabis is well recognised due to the distinctive shape of its leaf margins.
 
==== Stomata ====
Trichomes are resin-filled glands that appear on the sugar leaves and buds of Cannabis in the flowering stage. They contain THC, CBD, and other cannabinoids. They first appear on the plant as a translucent colour but slowly turn milky white as the plant matures. The opacity indicates the amount of THC in the trichrome. As flowering continues the milky white colour turns to amber as the THC converts into CBD.
 
More on trichomes at [https://dutch-passion.com/en/blog/what-are-cannabis-trichomes-and-how-do-they-affect-your-smoke-n986#types Dutch Passion]
==== Terpenes ====
Organic compounds found in the highest concentration in buds that create the taste and aroma of Cannabis.
 
<div align='center'>
<ul>
<li style="display: inline-block;"> [[File:Interior of glandular trichomes.jpg|thumb|none|300px]] </li>
<li style="display: inline-block;"> [[File:Close up trichomes.png|thumb|none|400px]] </li>
</ul>
</div>
 
==== Terpenes ====
OrganicThe organic compounds found in the highest concentration in buds that create the taste and aroma of Cannabis.[[File:Cannabis stigma.png|thumb|180x180px|Stigma held in a pair of forceps]]
====Stigma====
Hair-like structures that emerge from the bud are often (confusingly) referred to as Pistils. This is most likely because the stigma -possessing female plants are referred to as pistillate, which then became short-hand.<ref>https://weedmaps.com/learn/dictionary/pistil</ref> The colouration of the stigma can provide some insight into the maturity of the plant, as the plant matures, the stigma turnturns from white to orange.
[[File:Cannabis stigma.png|thumb|180x180px|Stigma held in a pair of forceps]]
Hair-like structures that emerge from the bud are often (confusingly) referred to as Pistils. This is most likely because the stigma possessing female plants are referred to as pistillate, which then became short-hand.<ref>https://weedmaps.com/learn/dictionary/pistil</ref> The colouration of the stigma can provide some insight into the maturity of the plant, as the plant matures, the stigma turn from white to orange.
 
====Bract====
[[File:Calyx Growth.png|thumb]]
[[File:Bract Anatomy.png|thumb|The bract in detail by Juan Ganjagod|link=Special:FilePath/Bract_Anatomy.png]]
The first part of the flower that forms, the Bract provides protection for the pistils and stigma and is the most resinous part of the bud. As the plant matures the Bract will swell and engulf more of the stigma. The Bract is often identified as a calyx but the calyx actually resides inside of the bract.<ref>The Nomenclature of Female Flowers, 2017
 
 
== Roots ==
Unless growing using hydroponics or airoponicsaeroponics the plant's roots are one part of the plant that is seldom seen. This makes them easy to forget despite thiertheir importance to plant health and yields. A strong root system will permiatepermeate the entire growth subtratesubstrate and allow for a high rate of transpiration, and nutrient absorption. If the root system rots then a plant will surely perish.
 
==== Rhizosphere ====
The rhizosphere is the area around the roots where the roots interact with the subtratesubstrate chemically and biologically. This is where symbiotic microbes and mycorrizhalmycorrhizal fungusfungi thrive and interact with the roots.
 
==Plant body==
===Node===
PointsThe points on the steammain stem wherethat lateral branches growemerge from. In the vegetative stage, nodes sprout two branches on opposite sides of the main stem. TheIn thirdflowering, nodelateral branches sprout in a staggered isfashion wherealternating the plantside beginsof tothe developmain strongstem budthey producinggrow branchesfrom.<sup>[citation needed]</sup>
 
==Plant metrics==
 
=== Transpiration rate ===
The rate at which water is being absorbed by the roots and expelled through the leaves via the stomata. The [[Temperature and Humidity#VPD|VPD]] of the environment a plant is in determines the maximum rate of transpiration.
 
This is a key metric for determining the growth rate of a plant.
 
===Inter-nodal distance===
Distance between [[Anatomy_of_Cannabis#Nodes|nodes]] on the main stem.