Other Genera

Some of the well-known herbaceous ornamental genera included among the more than 200 in the OPGC's collection are listed below.  In addition the collection includes many other genera of native North American species that may not yet be important from a commercial standpoint, but that include species with potential for development and use as ornamental plants.

A genus of approximately 40 species of annuals, herbaceous perennials and subshrubs.  The most common cultivated form is Antirrhinum majus, the common snapdragon.

Aquilegia hybrids are short-lived plants with brightly colored, spurred flowers.  These are clumping, herbaceous perennials that have an upright habit reaching up to 3 ft high and 1 ft wide. 

Asclepias species produce some of the most complex flowers in the plant kingdom, comparable to orchids in complexity. Five petals reflex backwards revealing a gynostegium (fused stamen filamens and styles) surrounded by a five-membered corona. The corona is composed of a five paired hood and horn structures with the hood acting as a sheath for the inner horn. Glands holding pollinia are found between the hoods. The size, shape and color of the horns and hoods are often important identifying characteristics for species in the genus Asclepias.

Beautiful violet blue, white or yellow flower stalks rise a foot above plants to bloom in early summer. The plants make a dense, lush clump of very attractive blue green foliage that stands up to the heat. Large enough to use as a single specimen. Herbaceous shrubby perennial. Full sun to part shade. Slow growing to 3 to 4 feet tall and wide. 

The genus Bidens

The genus Campanula includes many herbaceous perennials commonly known as bellflowers.

The Chrysanthemum at the OPGC are maintained as clonal plants.

The genus Clematis

The genus Cleome

The genus Cosmos

The genus Delphinium

The genus Dianthus

The genus Gaillardia

The genus Geranium, not to be confused with the common potted geranium that is in the genus Pelargonium

The genus Glandularia includes the popular potted plants known as verbenas.

Plants in the genus Gypsophila are known as baby's breath

The genus Iris is very large and highly diverse.

The genus Leucanthemum includes the ever-popular and present Shasta daisy.

The genus Liatris is found in the Asteraceae family

Plants in the genus Ligularia are known for preferring very moist soils and somewhat shaded environments.

The genus Lobelia include the cardinal flower species with vivid red flowers.

The genus Monarda, of the Lamiaceae, is known for fragrant foliage.

The genus Oenothera, the evening primroses, represents one of the largest groups of accessions held at the OPGC

The genus Pelargonium, whose cultivars and species are commonly described as geraniums, is one of major clonal collections within the OPGC.

The genus Penstemon is one of the most speciose (with the most number of species) in North America.  The OPGC has a substantial collection of Penstemon seeds.

The genus Petunia represents one of the most important commercial bedding plants crops in the USA.

The genus Portulaca has flowers with very vivid colors.

The genus Primula

The genus Ratibida

The genus Silene

The genus Solidago is synonymous with late-summer yellows and prairies.

The genus Stokesia consists of a single species and is native to the southeastern USA

The genus Symphyotrichum used to be known as Aster.

Members of the genus Tagetes are the ever-popular and reliable marigolds.