Biology 21 Field Botany

Plant Families


Sunflower Family

leaves: basal, or cauline, alternate to whorled, simple to compound
inflorescence: a head, each resembling a flower, with one to several whorls of bracts forming the involucre
flowers: perfect, unisexual or sterile calyx may be absent or modified as a pappus of bristles, scales or awns corolla radial or bilateral; lobes 4-5 stamens 4-5 with anthers generally fused into a cylinder around the style pistil 1, ovary inferior, 1 chambered, 1 seeded, style 1 stigmas 2
fruit: an achene

representative species

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