Oriental bettersweet arils, Jamaica Bay, NY
I have no idea what flower this is (even the woman who's garen it was in did not know). If anyone can identify it, I'd live to hear from you.
dandelion, Taraxacum officinale, seed head
Birdsfoot trefoil, Kissena Park, Queens, NY
Pastoral thistle, Jamaica Bay, NY
Porcelain berry, Jamaic Bay, NY
Mrs. Robb's bonnet
Japanese flowering apricot bonzai (also called Japanese Plum and Chinese Plum), Brooklyn Botanic Garden
Japanese flowering pricot bonzai (also called Japanese Plum and Chinese Plum), Brooklyn Botanic Garden
Japanese garden juniper bonzai, Brooklyn Botanic Garden
hybird witch hazel flowers
Cape cowslip, Brooklyn Botnic Garden
Jewelweed: Arkport, NY. 2005
Incidentally jewelweed, which often grown near poison ivy, is also a known remedy for the effects of poison ivy. Luckily, I've never had to try it.
mushroom (no idea what type): Arkport, NY. 2005
I know this is no plant, but the Plants gallery is the best home for it at the moment.