Sanguisorba menziesii ‘Wake Up’ (burnet ‘Wake Up’)

Sanguisorba ‘Blackthorn’ (burnet ‘Blackthorn’)

Sanguisorba officinalis ‘Tanna’ (burnet ‘Tanna’)

Schizachyrium scoparium ‘Little Luke’ (little bluestem ‘Little Luke’)

Scilla mischtkenkoana (Tubergen squill)

Scutellaria incana (skullcap)

Sesleria autumnalis (autumn moor grass)

Solidago x ‘Sugar Kisses’ (goldenrod ‘Sugar Kisses’)

Solidago ‘Wichita Mountains’ (goldenrod ‘Wichita Mountains’)

Sporobolus heterolepis (prairie dropseed)