Senecio ampullaceus

Common Name:  Texas Groundsel

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habit in Spring--Senecio ampullaceus is a tall annual heads--notice how large this capitulescence is (a capitulescence is a special term used in Asteraceae to describe a group of associated heads--also called capitula; it is analogous to an inflorescence)
heads close up--what kind of flowers are present here?  Do you notice the resemblance to Packera obovata? phyllaries (bracts that subtend the heads)

stem leaf--what kind of leaf attachment is present here? stem leaf again--what kind of leaf shape is present here?  Is there a petiole?  Look at this image and the previous image--how is this stem leaf different from the stem leaves of Packera obovata?