PRELIM LAB Flashcards
(102 cards)
represent descending axes of plants which are devoid of leaves.
Roots
are roots which are swollen for food storage and which show different internal structure from true roots.
Tuberous roots
are short, thick, solid, underground stems borne usually at the end of slender which arise from the lower region of the aerial stem.
Tubers
are creeping underground stems of horizontal, vertical, or oblique growth.
Rhizomes
are thickened, solid, erect, generally sub-spherical underground stems with leaf scars in the upper surface and root scars in the lower surface.
Corms
is the portion of a woody stem outside the cambium.
Bark
medicinal barks are obtained from the roots and are specified as
“root bark”
are generally flattened expansion of the stem in whose axis branches arise. _____ may be simple consisting of a single lamina, or they may be compounds where the lamina is divided into leaflets.
Leaves
are those parts of the plant axes that bear leaves of leaf modifications
Stems
are shoots that have undergone modifications so as to serve as means for propagation of the plant. Fruit consists of matured parts (carpels or pistils which include the ovary with the enclosed ovules and attached stigma and style) of individual flowers and flower clusters.
Flowers
are fertilized and ripened ovules each containing embryo.
Seeds
ovul erect with the micropyle at the apex
Orthotropus
ovule curved so that the apex and the base are close together
campylotropous
ovule inverted with the micropyle adjacent to the hilum
anatropous
he fruits of the members of the family _________ and of the family ____________ are often mistaken for seeds
Poaceae (caryopsis or grain)
Apiaceae (cremocarps splitting into two mericarps)
The seed consists of a________surrounded by one, two, or three coats
kernel
outer seed coat
testa
inner seea coat
tegmen
attach the placenta
stalk / funicle
scar left on the seed where it separates from the funicle
hilum
ridge of fibrovascular tisue formed in more or less anatropous ovules by the adhesion of funicle and testa
raphe
amorphous substances that are either soluble in water or swell in contact with water to produce viscous colloidal dispersions.
Gums
are amorphous solid or semisolid substances insoluble in water but soluble in alcohol, ether, chloroform and fixed oils. They may be liquefied by heating.
Resins
are natural mixtures of gum, oil and resin. Oleoresins are natural solutions of resins in volatile oil.
Gum-resins or oleo-gum-resins