Duration: Annual

Nativity: Native

Lifeform: Forb/Herb

General: Annual, stems erect and branched, 30-100cm tall, glabrous and angled; herbage with a strong odor.

Leaves: Alternate, pinnately lobed with rounded sinuses and oblong-toothed lobes, some teeth ending in long bristles, possessing glands on margins in sinuses and terminal on lobes.

Flowers: Heads corymbose-paniculate; peduncles 3-8cm long, bracteate; involucres turbinate,10-12mm; accessory bracts 6-7, dissected with 3-5 pairs of bristle-like divisions and a single large, central oval gland; principal phyllarees ca. 15, keeled, glabrous, the terminl, acuminate lobes 1-2mm; ligules orange, 7-9mm; disk corollas 7mm; pappus double, inner 5mm long, divided into bristles, outer 2mm.

Fruits: 5mm long.

Ecology: Desert grassland, oak-woodland, Chihuahuan desert scrub and tropical deciduous forest in waste/disturbed flat areas or on rocky slopes, 2953-8858 ft (900-2700 m).

Distribution: SE Arizona - S Mexico.

Notes: Apparently rare in southern Arizona. Distinguished by its annual life form, strong scent, orange-red disk flws and leaves and involucre bracts which are divided and spine tipped with clear, oval glands.

Ethnobotany: Unknown

Etymology: Adenophyllum is from the Greek for gland-leaf, while porophyllum refers to the leaves being like those of Porophyllum.

Synonyms: Dyssodia cancellata (Cass.) A.Gray, Dyssodia porophyllum var. cancellata (Cass.) Strother, Dyssodia porophylla (Cav.), Adenophyllum cancellatum Kuntze, Lebetina porophyllum (Cav.) Rydb.

Editor: FS Coburn, 2014