Heads radiate (in ours), the rays yellow, pistillate and fertile; invol bracts imbricate, greenish at least in part; receptacle flat or a little convex, naked; disk-fls numerous, perfect and fertile; style-branches flattened, with externally short-hairy, mostly elongate appendage; achenes ± compressed, several-to many-nerved; pappus double, the inner of elongate capillary bristles, the outer of short, coarse bristles or scales; herbs with alternate, entire or inconspicuously toothed lvs and medium-sized or rather large heads. 20, N. Amer. (Pityopsis)
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