S3S4
Adenophyllum wrightii (Wright's Dogweed)
Annual, 1.5-7 dm tall, branched from the base, stems striate, glabrous; basal leaves opposite, upper stem leaves alternate, 2.5-3.5 cm long, pinnatisect, bearing a conspicuous gland at the base of each lobe; bracts below the head not lobed; flower he...