Lecture 10 Flashcards
Wood called ….
Lignum
Element of wood 5
Tracheises
Vessels
Medullary rays
Wood parenchyma
Fibers
Sap wood (4 & eg)
Lighter than heart wood
Outer newly formed (2ry xylem)
Still leaving
Reserve food material
Function water transport
Quassia wood
Heart wood
Darker than sap wood
Inner & central portion
Dead (1ry xylem)
No R F M
No functioning vessels are blocked by resins
Support
Eg Guaiacum wood
Quassia wood origin
Dried sap wood of the branches of Quassia amara family simarubaceae
Picrasma excelsa
Active constituents and chemical test for Quassia amara
Bitter principle
Powder+alcohol red color
Quassia amara uses 3
As non astringent bitter tonic
Parasiticide for head and body lice
Anthelmintic for threadworms
Active constituents in Castenea sativa
Tannins
Castanea sativa origin
The sweet chestnut also know as Spanish chestnut or just chestnut
Family fagaceae
Uses of Castenea sativa
Anti-cancer
Antioxidant
In chronic inflammation
Herbs in botany
A plant with non-woody and non-permanent stem which dies after fruiting
Herbs in pgarmacognacy
It is a drug formed of tender part of the plant axis (stem) together with the leaves , flowers and fruits
General characters of the stem
In gallery
Shape of the stem 2
Clyindrical (thymi)
Angular ( with angle sides) :
A. Triangular
B. Quadrangular or square (mentha)
Kind of stem 3 and qualities to everyone
- Herbaceous (soft , easy broken usually green )
- Woody (trees with large amount of xylem , usually covered with cork , Eucalyptus)
- Shrubby stem (lower part is woody while upper parts are herbaceous )
Suffruiticoss
