"Bachelor's Button. I, vertical section of the receptacle; II, style and forked stigma; III, corolla, united anthers and stigma; IV, pistil; pap, pappus; ak, akene; V, tubular flower cut vertically, showing anther-tube, traversed by the style; l, lobe of corolla." -Bergen, 1896

Cornflower

"Bachelor's Button. I, vertical section of the receptacle; II, style and forked stigma; III, corolla,…

"Bachelor's Button. I, a tubular flower; anth, the united anthers; II, fruit; III, fruit, vertical section; IV, a neutral ray-flower; V, ring of anthers." -Bergen, 1896

Cornflower

"Bachelor's Button. I, a tubular flower; anth, the united anthers; II, fruit; III, fruit, vertical section;…

"Stigma of thorn-apple (Datura) with pollen." -Bergen, 1896

Stigma

"Stigma of thorn-apple (Datura) with pollen." -Bergen, 1896

"Flower-cluster of yarrow (Achillea Millefolium). A, head seen from above; B, longitudinal section; re, receptacle; ch, chaff; i, involucre; r, ray-flowers; d, disk-flowers; c, corolla; s, stigma." -Bergen, 1896

Yarrow

"Flower-cluster of yarrow (Achillea Millefolium). A, head seen from above; B, longitudinal section;…