Agave multifilifera is related to A. filifera and also has chalky white markings on the leaves but with more curling white hairs on the leaf edges.

Agave palmeri is the largest species native to the United States with blue-green, lance-shaped leaves.

Agave 'J.C. Raulston' has a particularly beautiful form of wide, bluish grey, succulent leaves and greater tolerance of wet winters.

Agave parryi var. truncata is a dramatic, bluish-grey succulent with tight artichoke-like rosettes and shorter leaves than other forms.

Agave parviflora var. flexiflora is a small, solitary agave dark green leaves marked with silver-white and with curling threads or filifers along the leaf edges.

Agave striata, the narrow leaf century plant, is a hardy species with very thin, almost wiry, green to blue-green leaves.

Agave stricta var. rubra, known as the red hedgehog agave, is a fascinating variety with long, narrow, stiff, quill-like, grey-green leaves turning red with stress.

Agave utahensis ssp. eborispina is a dramatic, super hardy, small agave with the longest terminal spines of the subspecies up to 4 inches long!

Agave utahensis ssp. kaibabensis is the largest and most cold hardy subspecies of the Utah century plant tolerating zone 5 winters.

Ajuga reptans 'Blueberry Muffin' is a bugleweed with dark new foliage and blueberry-blue flowers on eight inch spikes.

Ajuga reptans 'Princess Elsa' is an evergreen bugleweed with shiny, silver foliage and blue-purple flowers.

Ajuga reptans 'Princess Leia' is a tricolour variegated, evergreen bugleweed with silver-green, creamy white and dark green foliage.

Alcea rosea 'Halo Blush' has unique pure white petals with a deep magenta ring around the middle of a greenish centre.

Alcea rosea 'Halo Candy' has unique candy pink flowers with darker pink stripes that radiate from a purple-black eye.

Alcea rosea 'Halo Cerise' has glowing pink to magenta flowers with deep royal purple centres.

Alcea rosea 'Halo Lavender' has unique lavender-purple flowers with a glowing pink ring surrounding a yellow centre.

Alcea rosea 'Nigra' is the black hollyhock.

Alcea rosea Spotlight 'Blacknight' is a hollyhock with large, old-fashioned, single, purple-black flowers with small white eyes.

Alcea rosea Spotlight 'Mars Magic' is a hollyhock with large, old-fashioned, single, red flowers with bright yellow eyes.

Alcea rosea Spotlight 'Polarstar' is a hollyhock with large, old-fashioned, single white flowers with bright yellow eyes.

Alcea rosea Spotlight 'Radiant Rose' is a hollyhock with large, old-fashioned, single rosy-pink flowers with bright yellow eyes.

Alcea rosea Spotlight 'Sunshine' is a hollyhock with large, old-fashioned, single yellow flowers.