The other two non-glandular trichomes are visible with magnification. These smaller cystolith hairs with warty bumps and teardrop-shaped trichomes are found mainly on the underside of leaves. The larger cystolith hairs provide defense against insects and likely make the plant less palatable to animals. Cystolith hairs also reflect radiation, reduce water loss, and ameliorate near-surface temperatures.
Resin glands synthesize and hold the cannabinoids and terpenes and are of three types: bulbous, capitate-sessile, and capitate-stalked.
Cannabis flowers are not brightly colored, large, or enticingly fragrant (at least to most non-humans); marijuana plants are wind-pollinated with no need to attract insects or animals to carry the males’ pollen, hence these plant parts never evolved into significant, attractive, or showy parts.
Cannabis has six kinds of trichomes: three are non-glandular and three are glandular and resin-bearing. Cystolith hairs are the most visible of the non-glandular as these needle-like “hairs” prominently cover all of the above-ground plant parts: stems, branches, leaves, petioles and flowers.
Capitate-stalked glands are the largest, are the main source of cannabinoid accumulation, and are plainly visible on female flowers. While almost all cells in a cannabis plant are capable of producing minute amounts of cannabinoids, capitate-stalked glands contain at least 50% of the total cannabinoids in a plant. Since female flowers (buds) are the main smokeable product, and buds are the main locus of capitate-stalked glands, these glands are our main source of cannabinoids and terpenes.
From O’Shaughnessy’s Winter 2018/19
Stigmas are the pollen catchers. Some writers identify stigmas as pistils, and this too is incorrect. The pistil is all of the reproductive female flower parts. The Cannabis pistil consists of two stigmas and an ovule (prospective seed). The term is misused in many books and seed catalogs that describe a single Cannabis flower as having two pistils.
Male plants also form all of these trichomes, and until flowering, concentrations of cannabinoids are similar in male and female plants. With the onset of flowering, female plants produce much more cannabinoids than males, primarily because of the concentration and size of capitate-stalked resin glands on female flowers and associated small leaves (bud leaves) that intersperse flower clusters.
By Mel Frank
The Cannabis Female Flower From O’Shaughnessy’s Winter 2018/19 By Mel Frank In the cannabis industry, the general terms—bud, cola, nug— are easy enough and universally accepted,