Aa - The first print in my Thomas series

So, here is the first of a series of prints I have made from the many wondeful drawings left by Thomas. He had planned these as a book, but only got as far as 'I', so I am hoping they will find happy homes as name initials. There are lots of things to find beginning with 'A', but he didn't leave a list (or, in fact, ever in his life make a list) so I keep thinking I've found them all and then I find another. I'll give you a clue, though: a knowledge of botany (or a book thereon) will gain you extra finds. Enjoy :o).