a spurred corolla

Once a brand has established a consumer franchise and a brand image, it takes a long time for these to decay, as the image is maintained more by people's personal familiarity with and usage of the brand than by external marketing stimuli.

… but, rising abruptly northward, they prevented the passage of armies except at the far north, and subordinate ranges curtained and defended the intervening valleys as foremade runways for invasive operations northward, while opening into supply sections to the south.

A and B are ‘co-dominant’ versions of the same gene, O being the ‘recessive’ form of it.