Actually, this description is quite insufficient. There are several plants that match this description, and some of them might be belonging to Echeveria or Eucomis families. Another possible candidates are the Zebra plant or Peruvian Lily.
an acorn
perhaps a little more info?
Possibly:
Ipomoea alba (moonflower, the most common night bloomer of the genus), which is usually white, but is sometimes offered in shades of pink.
There are as many as 60 plants world wide with heart shaped leaves. A few of them are the Red Fox, the Earth Angel, and Twilight.
Daffodils, dandelions, buttercups, tulips, lilies; in fact many flowers. I have often wondered why so many yellow flowered plants blossom at the same time, and the same with other colours.
lysimachia ciliata purpurea
Berberis thunbergia atropurpurea.
Dicentra spectabilis or Bleeding Heart.
no it isn't kid
A green fuzzy Italian herb with small leaves might be basil. Another herb that matches this description is the mint plant.
sycamore
St. John's wort is a plant having green leaves and yellow flowers.
Daphnes are shrubs with green leaves tipped with yellow. Their flowers called Daphne odora, are whitish pink.
The plant looks like MJ ( sort of). The flowers look like buttercup flowers. The leaves are green, slim, short(er) and serated
yes they should have green leaves. Green leaves are green because they have chlorophyll which is needed for flowers.
A large fuzzy green caterpillar with yellow horns is a Imperial Moth caterpillar. These will go back into the tree if left alone.
It is a bush with green stems, small green thorny leaves and many small, bright yellow flowers which last for a long time, especially in spring-time.
Yes, you can plant other flowers around tulips when their leaves are still green. Be careful not to dig into the tulip bulb when planting the new flowers. When tulip leaves are yellow and brown and drying, you can give them a small tug and they'll come free from the bulb. Don't remove them while still green - they're making food for the bulb to store for next year's blooms.
OPUNTIA
Some are. They are usually green or a yellowish-green.