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swollen calyx

Swollen calyx

Resin glands synthesize and hold the cannabinoids and terpenes and are of three types: bulbous, capitate-sessile, and capitate-stalked.

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.
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.

From O’Shaughnessy’s Winter 2018/19
Capitate-sessile gland heads are much larger, sit upon a short stalk, which makes them appear stalkless and hence, described as sessile. Capitate-sessile glands likely contribute to the overall cannabinoid concentration due to their larger size and presence on flowers, leaves and petioles.
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.
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.
Each female marijuana flower has two stigmas that protrude from a single ovule; they are “fuzzy” (hirsute), about ¼ to ½ inch long, usually white, but sometimes yellowish, or pink to red and, occasionally, lavender to purple.

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,