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298 Textbook of Pharmacognosy
Adulteration
Fennel is often adulterated with the fruits of other Apiaceae like F. piperitum (Italy), fruits of grasses, cereals, weed seeds, undeveloped and exhausted fruits of fennel, moldy fruits and dirt.
BLACK PEPPER
Synonyms
Fructus piperis nigri, Pepper, Peppercorn (English), Schwarzer Pfeffer or Gruner Pfeffer (German), Poivre noir or Poivre vert (French), Pepe (Italian), Pimienta (Spanish), Kosho or Peppa (Japanese), Fulful or Filfil (Arabic), Perets (Russian), Pimenta-do-reino or Pimenta (Portuguese), Piper (Latin), Peper (Dutch), Koino piperi or Piperi (Greek), Ngayok-kaung or Nga-youk­kuan (Burmese), Hu-chiao or Hei hu jiao (Chinese), Miris (Sinhala), Marica or Vella or Krishnan or Krishnadi (Sanskrit), Kali-mirch, Golmarich or Gulmarich or Sabuja marich (Bengali), Gol mirch or Gulki (Hindi), Kaali mirch, Habush, Vellajung (Punjabi), Martz (Kashmiri), Kala-miri (Maharashtrian), Miri (Konkani), Kalo-mirich or Lila Mari (Gujarati), Miriyalu, Miriyamu or Savyamu (Telugu), Milagu or Yavanappiriyam (Tamil), Volle-menasu or Menasu (Kannada), Kuru-mulaka or Paccha Kurumulagu or Yavanpriyam (Malayalam), Mire (Marathi), Kalu-miris (Sinhalese), Nayukon (Burmese), Ladahitam (Malaysian).
Biological Source
Black pepper consists of the dried, unripe fruits of Piper nigrum L. (Family: Piperaceae), usually known as peppercorns. Other closely related Asian species is Piper caninum. The word, pepper is derived from the Sanskrit word, pippali via the Latin, piper used by Romans. The English word, pepper is derived from Old English, pipor. Pepper means ‘spirit’ or ‘energy’ and this was used as far back as 1840.
Piper nigrum
on a support Part of a shoot with leaves
Systematic Pharmacognostic Study of Volatile Oils 299
Leaves with unripe fruits Red ripe fruits
Dried pepper
Pepper - Closeup
Pepper oilPepper powder
Geographical Source
Black pepper is native to Malabar in the Western Coast of Southern India and Sri Lanka and extensively cultivated there and in tropical regions. The
300 Textbook of Pharmacognosy
habitat of the plant is Kerala and it is indigenous to Malabar and cultivated in South India. It is also cultivated in Sri Lanka, Indonesia, Brazil, Singapore, Penang (Malaysia), Siam, Johore, Borneo, Vietnam, Sumatra, Rioux-Lingga archipelago, South America and West Indies. Two well known types come from India’s Malabar coast, Malabar pepper and Tellicherry pepper, the former is the higher grade pepper from the plants grown on Mount Tellicherry, Malabar. Vietnam is the world’s largest producer (34%) and exporter of pepper as of 2008, followed by India (19%).
Collection and Preparation
Pepper is essentially a crop of wet tropics. The plant commences bearing fruit in the third year, comes into full production in the seventh or eighth year and starts declining in yield in its twenty-fifth or thirtieth year. It flowers in May-August and develops into ripe berries in another 6–8 months. The fruits that develop in the spikes are cut from the vines as soon as the lowest drupes on the axis begin to change their colour from green to red. The spikes are then dried in the sun or over fire followed by the separation of the fruits from the rachis, garbled and placed in bags. The unripe berries are cooked for sometime in hot water, to clean and prepare them for drying. The berries are dried in the sun or by machine for several days, during which time pepper around the seed shrinks and darkens into a thin wrinkled black layer. Once it is dried, the spice is called black pepper. The best grades are dried over fire and possess a smoky odour and taste and the Singapore variety seems to be the best of all.
Characters
Macroscopic Characters
Pepper plant is a perennial woody vine of 4 m height on the support and roots readily where the stem touches. The leaves are alternate, 5–10 cm long and 3–6 cm broad. The flowers are small and are produced on pendulous spikes of 4–8 cm long at the nodes. Black pepper vine is cultivated for its fruits which are almost globular and 6 mm or less in diameter, dark red when fully mature. The surface is dark brown or grayish­black and the apex shows the remains of the sessile stigmas and a basal scar. The drupes are single-seeded and the seed (peppercorn) is nearly white. Pepper has an aromatic odour and strong pungent taste. The kernel is hollow at the centre, entirely consisting of perisperm and a small endosperm and embryo.
Microscopic Characters
Transverse section of the drupe shows an epicarp of polygonal epidermal cells with a distinct cuticle followed by thin walled parenchymatous hypodermis with starch grains and chlorophyll along with scattered large
Systematic Pharmacognostic Study of Volatile Oils 301
secretory sacs with oil or resin contents. The inner pericarp layer, endocarp is brown and made-up of sclerenchyma. Seed coat layer is attached to endocarp and is reddish-brown. Pericarp and perisperm contain oil glands. Abundant starch grains are also present.
Chemical Constituents
The spiciness of pepper is due to a crystalline, alkaline and volatile alkaloid piperine (5–9%), a yellow balsamic volatile oil (1–2%), a colourless liquid alkaloid piperidine, a soluble pungent resin called chavicine, proteins and starch (about 30%), in addition to starch, lignin, gum, fat (1%), proteids (7%) and organic matter in the mesocarp of the fruit. Pungency and acrid taste of the fruit is due to piperine (discovered by M. Oerstadt in 1819 and accurately examined by Pelletier in 1821). The chief components of volatile oil (3%) are sabinene (15–25%), limonene (50–29%), caryophyllene (10–15%), beta-pinene (10–12%), α-pinene (8–12%), terpinene, myrcene, borneol, carvone, carvacrol, 1,8-cineol, linalool, humulene, beta-bisabalone, and acid amides. Other compounds like eugenol, myristicin and safrole are found in traces. Further, branched-chain aldehydes like 3-methylbutanal and methylpropanal are also found.
Piperidine (C5H11N)
Piperine (C17H19NO3)
Sabinene (C10H16)
Chavicine (C17H19NO3)
Bisabolene (C15H26) Humulene (C15H24)
302 Textbook of Pharmacognosy
Carvacrol (C10H14O)
Borneol (C10H18O)
Alpha-Terpinene (C10H16)
Carvone (C
10H14
Myrcene (C10H16)
Limonene (C10H16)
O)
Caryophyllene (C15H24)
Linalool (C10H18O)
Pinene (C10H16)
2-Methylpropanal (C4H8O)
Systematic Pharmacognostic Study of Volatile Oils 303
History of Black Pepper
Pepper has been known from antiquity both for its flavour and use as medicine. No plant since the Apple of Eden has had a greater effect on human history than the black pepper. Pepper has been used in the Western culture for millennia with documented references dating back to 500 BC and is known as the ‘King of Spices’ or the ‘Master Spice’. The archaeological evidence proves that humans have been using pepper and grinding peppercorns for 9000 years. The method of chewing betel nuts, betel leaves (Piperaceae) and lime powder (tambula) was first described by Herodotus (340 BC). This began when Alexander the Great (327 BC) invaded India and discovered the pleasure of well-seasoned food. Though pepper has been mentioned in writings that are over 3000 years old, the cultivation began in Indonesia around 100 BC. Black pepper was found stuffed in the nostrils of Ramesses II placed as a part of the mummification rituals shortly after his death in 1213 BC. Pepper was also known in Greece as early as 4th century BC. Hippocrates was known to have employed pepper in several diseases. Pliny, the Elder, in his Natural History describes the prices in Rome around 77 AD, as ‘Long pepper ….. is 15 denarii per pound, while that of white pepper is 7, and of black, 4’. This indicates that pepper was used as commodity money during the Roman time. Black pepper was well known and widespread in Roman Empire according to Apicius’ de re coquinaria, a 3rd century cook book which includes pepper used in majority of its recipes and in ‘The History of the Decline and Fall of the Roman Empire’ Edward Gibbon wrote that pepper was a favourite ingredient of the most expensive Roman cookery. It is also said that Alaric, the Visigoths (410 AD) and Attila, the Hun (408 AD), each demanded a ransom of more than 3000 pounds of pepper from Rome as a tribute when they besieged the city in 5th century, which speaks of the fact that pepper was so valuable at that time and was the collateral currency. In the Middle ages, pepper was used to conceal the taste of partially rotten meat, as the people of the time knew that eating the spoiled food would make them sick, and it is true that piperine in pepper has antimicrobial properties. Black pepper was known in China in the 2nd century BC if the reports of Tang Meng, an explorer are correct. Black pepper made its first appearance in Chinese texts as hujiao (foreign pepper) and by the 12th century it had become a popular ingredient in Chinese cuisine. Pepper reached South East Asia more than 2000 years ago and was grown in Malaysia and Indonesia about that time. Pepper plantations in Brazil go back to 1930. Pepper has been used in India since pre-historic times as a spice, and has been known to Indian cooking since 2000 BC. India particularly, the Malabar coast (present Kerala state) was the important source until well after the Middle ages to Europe, the Middle East, North Africa, Thailand and Malaysia. In trade, it was often referred to as ‘black gold’ and was used as a form of commodity money, as the
304 Textbook of Pharmacognosy
Romans knew both long pepper (Piper longum) and black pepper and referred them as pepper. Chapter 5 of Samannaphala Sutta, a Buddhist book, contains reference to pepper as one of the few medicines allowed to be always carried by a monk. By 16th century, pepper was being grown in Java, Sumatra, Madagascar and Malaysia. Thus, pepper was both a seasoning and medicinal spice historically.
Medicinal Uses
The fruits of pepper are used in indigestion, asthma, fever, cough, dysentery and haemorrhoids. It is stimulant, carminative, antiperiodic and stomachic. It is also anthelmintic, rubifacient, resolvent and antipyretic. The oil (Oleum piperis) is used in the treatment of pain relief, rheumastism, chills, flu, colds, exhaustion, muscular aches and fever. It is used to increase circulation, to increase the flow of saliva, to stimulate appetite, to encourage peristalsis, to tone up the muscles of the colon and as a general digestive and nerve tonic. It is used as a gargle for relaxed uvula and paralysis of the tongue. It corrects atonic dyspepsia, flatulence and nausea. It is also used in vertigo, arthritis and has been advised in diarrhoea and cholera. Externally, it is used for relaxed sore throat and skin diseases. It is also bacteriostatic and fungistatic. Pepper acts as a stimulant and accelerates the frequency of the pulse, promotes diaphoresis, excites mucous surfaces and stimulates urino­genital apparatus.
Culinary Uses
Pepper is mainly used as a culinary condiment in almost all cuisines of the world. Black pepper is popular for mild stews preferred in the cuisine of the Royal Thai Court. In Cambodia, this is a part of the table condiment called tik marij. Sweetmeats containing pepper were common in ancient Greece and Rome, and a few of them are still found in current European cuisine like panforte (Italian) and Lebkuchen (German). In India, pepper is used more abundantly in the preparation of curry powder (Anglo-Indian), garam masala (North Indian) and sambar podi (South Indian). Pepper is also popular in Arabic cuisine such as zhoug (Yemen), baharat (Coast of Gulf), ras el hanout (Morocco), galat dagga (Tunisia) and berbere (Ethiopia).
Other Uses
East Africans believe that the body odour after consuming substantial amounts of pepper repels mosquitoes. Gardeners use pepper spray (in warm water) against several kinds of pests like ants, potato bugs, silverfish, cockroaches and moths.
Adulteration
Pepper is adulterated with hulls (broken pieces of pericarp) of white pepper. The poorest grade is the Acheen pepper and is often mixed with pepper
Systematic Pharmacognostic Study of Volatile Oils 305
shells, dirt and small stones. The pepper powder is often mixed with groundnut nutshells, buckwheat hulls, cocoa shells, legume seeds, pepper stems, cereal hulls, mustard husks and seeds, juniper berries, olive pits, flax seed, ground charcoal and dust.

REVIEW QUESTIONS

1. Essay and Short Answer Questions:
1. Write short notes on: a. Peppermint oil b. Uses of coriander c. Lemon oil d. Pharmaceutical uses of ginger e. Cardamom f. Tulsi g. Lemon grass h. Caraway i. Cumin j. Dill k. Fennel l. Black pepper
2. Describe the source, collection and preparation, constituents and pharmaceutical uses of cinnamon.
3. Describe the biological source, collection and preparation, constituents and medicinal uses of nutmeg.
4. Describe the source, constituents and pharmaceutical uses of eucalyptus.
5. Describe the source, collection and preparation, constituents and pharmaceutical uses of cloves.
2. Choose the Correct Alternative:
1. Volatile oils are: [ ]
a. Soluble in water b. Insoluble in alcohol and ether
c. Optically active d. All the above
2. The following is used in non-staining iodine ointment: [ ]
a. Olive oil b. Linseed oil
c. Castor oil d. Lard oil
3. Which one of the following is a good immunomodulating agent? [ ]
a. Tulsi b. Nutmeg
c. Mentha d. Cumin
306 Textbook of Pharmacognosy
4. The synonym of eucalyptus oil is: [ ]
a. American worm seed oil b. Chenoposan
c. Indian melissa oil d. Dinkum oil
5. Eucalyptus oil is used as: [ ]
a. Counter-irritant b. Antiseptic
c. Both a and b d. None
6. The following is used as a dental analgesic and in the preparation of cigarettes: [ ]
a. Tulsi b. Cloves
c. Cardamom d. Fennel
7. The number of vittae present in the fruit of coriander: [ ]
a. 12 b. 8
c. 6 d. 4
3. Fill in the Blanks:
1. .................................................... method is used for the extraction of
volatile oils from the crude drugs.
2. Lemon grass is an example for..........................................volatile oils.
3. ...................................................... oil is a strong bactericidal agent.
4. The cathartic property of castor oil is due to irritant action of
......................................................
5. The chief constituent of caraway volatile oil is .....................................
6. ...................................... is used for citral content and for the
synthesis of vitamin A.
7. Olive oil is extracted by ....................................................... method.
8. ............................................... oil has blood cholesterol reducing
property.
9. The crude eucalyptus oil produced is rectified again after treatment
with ..........................
10. The fat of nutmeg is also known as ......................................................
11. Cinnamon bark contains a sweet substance known as
.............................................................
12. Mentha piperita is a hybrid of a cross between ........................... and
...............................................
13. The nutlets of Mentha have an aromatic odour and taste followed by a cooling sensation on drawing in breath due to
...............................................
14. The glandular hairs on the mid rib and the veins in Mentha contain
the ...............................................
Systematic Pharmacognostic Study of Volatile Oils 307
4. True or False Statements:
1. Coriander is cultivated only as a kharif crop. [True/False]
2. Dill volatile oil is used in the gastric disturbances of infants and children. [True/False]
3. Linseed oil is obtained from Garcinia indica. [True/False]
4. Castor oil is used as an emollient. [True/False]
5. Freshly harvested volatile oil containing plants should be dried in sunlight [True/False]
6. Volatile oils have a low refractive index and optically inactive.
[True/False]
7. Cloves is an example for oxide volatile oils. [True/False]
8. Linseed oil is used in medicines. [True/False]
9. The synonym of lemongrass oil is Indian Melissa oil.
[True/False]
10. Beta-ionine which is the starting material for vitamin A synthesis is obtained from citral. [True/False]
11. The synonym of olive oil is lanolin. [True/False]
12. Cinnamon is the first spice to be mentioned in the old testament.
[True/False]
5. A. Match the following:
1. Carminative [ ] a. Mentha oil
2. Aromatic [ ] b. Caraway
3. Gripe water [ ] c. Cinnamon
4. Toothpaste [ ] d. Coriander
5. Spice [ ] e. Dill
B. Match the following:
1. Queen of spices [ ] a. Black pepper
2. Mace [ ] b. Stylopod
3. King of spices [ ] c. Lysigenous cavities
4. Cremocarp [ ] d. Aril
5. Lemon oil [ ] e. Cardamom
C. Match the following:
1. Ocimum [ ] a. Antiparasitic and vermifuge
2. Caraway [ ] b. Mother of cloves
3. Aqua foeniculi [ ] c. COX-2 inhibitor
4. Dill fruits [ ] d. Domestic gripe water
5. Ripe berry of clove [ ] e. Emmenagogue and galactogogue