Classic Poem

`Lily of the Valley (Convalaria Majalis, fam. Lilliaceae). Grows wild in N. England. Commonly cultivated. Flowers in May. Berries red when ripe. Leaves particularly poisonous because three constituents depress the heart, like Foxglove.'

What are the constituents that depress the heart?
the scent of lilies in dark green silences under trees
milkweed and ragwort and sunshine in hedges
small flowers picked amongst trees when it's raining

A year ago
You planted lilies in the valley of my mind
There were lilies at the bottom of my garden
And ferrys at the bottom of my street

Now
I sit here in sunlight with the smell of wild garlic
Trying to tape record the sound of windflowers and
celandines

Wondering What are the three constituents that depress the heart Without you here in the country?