5. The pupils make collections of the seeds of the weeds that have been studied.
OBSERVATION LESSON ON WEED SEEDS
The seed of a weed should always be exhibited and studied in association with a fresh or a mounted specimen of the weed.
Each pupil should use a hand lens in examining the seed.
The pupils examine the seed of each species and describe it according to the following scheme:
NAME OF SEED
Colour:
Size: (in fractions of an inch)
Shape:
Details:
Occurrence:
The results of the pupils' study of the ox-eye daisy would then appear in the following form:
SEED OF OX-EYE DAISY
Colour: Black and greenish-white in stripes,
Size: One sixteenth of an inch,
Shape: Club-shaped,
Details: Grooved lengthwise, yellow peg in large end,
Occurrence: A common impurity in grass seed.