Flower Drugs: Clove and Pyrethrum

<p>Essential oil glands (A)</p> Signup and view all the answers

<p>They produce blown cloves and fruits (D)</p> Signup and view all the answers

<p>1 m (B)</p> Signup and view all the answers

<p>The disk florets (D)</p> Signup and view all the answers

<p>C.lanatus (A)</p> Signup and view all the answers

<p>9-12 mm (C)</p> Signup and view all the answers

<p>Pyrethrin II (B)</p> Signup and view all the answers

<p>Parenchyma (D)</p> Signup and view all the answers

<p>They have about 17 veins and 3 rounded teeth (B)</p> Signup and view all the answers

<p>Peduncle (A)</p> Signup and view all the answers

<p>Aerenchyma (A)</p> Signup and view all the answers

<p>Lignified thickening (B)</p> Signup and view all the answers

<p>Triangularly shaped pollen grains (C)</p> Signup and view all the answers

<p>Antiseptic properties (C)</p> Signup and view all the answers

<p>Eugenol (C)</p> Signup and view all the answers

<p>Calcium oxalate crystals (B)</p> Signup and view all the answers

<p>Only sepals have stomata (A)</p> Signup and view all the answers

<p>14-21% (C)</p> Signup and view all the answers

The dried flower buds of the Syzygium aromaticum (Eugenia caryophyllus) tree.

Cloves are harvested between August and December when the lower parts turn from green to crimson. If left too long, the buds open and fall off, resulting in ‘blown cloves’ and ‘mother cloves’ (fruits).

Cloves consist of a head on a cylindrical hypanthium. The head includes 4 calyx teeth (sepals), 4 imbricated petals, numerous stamens around a large style, and a bilocular ovary with numerous ovules.

Cloves have a strong, fragrant, spicy aroma and a pungent, aromatic taste. They sink in water and release oil when squeezed.

Penang & Amboyna varieties: larger and plumpest, reddish-brown in color. Zanzibar variety: smaller and leaner, blackish-brown in color.

A ring of vascular bundles found in the hypanthium of a clove flower. These bundles are bicollateral, meaning they have xylem on both sides of the phloem.

A layer of cells in the clove hypanthium that contains oil glands, contributing to the characteristic aroma of cloves.

Parenchyma cells found in the ovary wall of a clove, forming the partitions between the locules (chambers) of the ovary.

Parenchyma tissue present in the sepals and petals of a clove flower. It contains oil glands and calcium oxalate crystals.

Triangularly shaped pollen grains found in the anther of a clove flower. These grains measure about 15-20 µm in diameter.

A fragrant oily compound found in clove oil. It is responsible for the characteristic aroma and flavor of cloves.

A type of tannin found in cloves, which contributes to their astringent properties.

Crystals of calcium oxalate found in various parts of the clove flower, including the ovary, sepals, and petals.

The main flower head of the Pyrethrum plant is composed of two types of florets: disk florets (yellow center) and ray florets (white petals).

Pyrethrum contains several esters responsible for its insecticidal properties, with Pyrethrin I being the most lethal and Pyrethrin II producing rapid knock-down effects.

The Pyrethrum plant is a perennial herb, reaching approximately 1 meter in height, and is known for its medicinal and insecticidal properties.

The microscopy of Pyrethrum powder reveals characteristic features such as T-shaped hairs, spherical pollen grains, and striated papillose cuticle of epidermal cells, indicating its unique composition.

The outer ring of white florets in the Pyrethrum flower head are known as ray florets. Each one has a long, narrow shape and can be 10-20 mm in length.

The Pyrethrum plant's flowers are used to produce insecticides, primarily for pest control in agriculture.

The central portion of the Pyrethrum flower head is densely populated with yellow disk florets, forming a tubular shape.

The involucre of the Pyrethrum flower head is comprised of yellowish, lanceolate, and hairy bracts, protecting the developing flower buds.