California Native Plant Society

Growing Clarkias


Clarkia bottae by Ron Vanderhoff.

Clarkia rhomboidea
Clarkia rhomboidea by Ron Vanderhoff.

Clarkia rhomboidea
Clarkia unguiculata by Liz Parsons. click images to view larger

By Liz Parsons

Clarkias are annual plants that are easy to grow in our gardens. This is good because their charismatic flowers can become an obsession. Clarkias bloom at the end of the wildflower season, hence their common name “Farewell-to-Spring”. In most wildflower mixes, Clarkias are included and they extend the blooming period of the mix into June. At the flower market, Clarkias are sold as Godetias and this refers to an older name of the genus which was abandoned long ago, but is still used in the flower trade. The flower is really Clarkia amoena ssp. whitneyi, a spectacularly large flower that is in the color range red-pink-white.

When I say easy to grow, I mean that they germinate easily when seeds are sown at the beginning of the rainy season. The cotyledon leaves are easy to identify with reddish tones to the stems and mid-ribs. The seeds are easy to collect in their wild places because the seeds are held within their capsules rather than dehiscing explosively like the CA poppy. My approach is to identify the Clarkia species in the field and then return later to collect the seeds. I have done this with success for many species and currently have several blooming in my garden...Clarkia gracilis ssp. sonomensis and C. rhombiodea are very persistent. To satisfy my needs, I have purchased plants or seeds of Clarkia unguiculata (elegant Clarkia), C. concinna (red ribbons), C. amoena var. whitneyi ( large flowered clarkia or Godetia), C. imbricata, and C. rubicunda (ruby chalice Clarkia).

In the new Jepson Manual,  40 species of Clarkia are recognized along with many sub-species. The Clarkia flowers are generally in pink tones with two flower types--the bowl,  with four entire petals arranged in a bowl; often with flashy red blotch at the base of the petal...i.e. C. amoena and C. rubicunda. The second type is a rotate or non-bowl shape, some of which have lobes...i.e. C. concinna and C. unguiculata.   C. unguiculata, elegant Clarkia was sent to England in 1840 by David Douglas  and the plant breeders have been creating beautiful hybrids which have deep colors and double or triple petals since that time.

Our gardens are infused with memories. Memories of the person who gave us the seeds of the plants or memories of the wild place that the plant was first encountered. The name of many plants can tell the history.   Clarkias are named after William Clark of the Lewis and Clark expedition. (Lewis is remembered with the genus Lewisia, the most familiar is the Lewisia rediviva, bitterroot,  the state flower of Montana.)

When the rains are nicely spaced and a lot of plants come into bloom, annual wildflowers can give us spectacular displays. This year is only so-so here in Sonoma County but last year (2011) was spectacular. The bright pink Clarkias burst from the roadsides.   In the Sierra, I was thrilled with a show of Clarkia williamsonii that filled the mountain meadows. I have yet to purchase seeds of C. williamsonii, but you can be sure that it is on my list of seeds to buy.

In the wild, Clarkias are joined at the end of the season with Triteleia laxa (Ithuriel’s Spear) and Brodiaea elegans...the Harvest Brodiaeas; also the Calochortus species...in Sonoma Count, Calochortus luteus is prominent in June. These are plants that grow from bulbs and they can be purchased to recreate a wildflower meadow in the garden.

 

Liz Parsons has been the chairman of the annual Milo Baker Plant Sale for 30 years and has propagated and grown many of the plants for the sale each year. Liz is also a CNPS Fellow, a designation of high distinction bestowed upon CNPS members who have accumulated extraordinary accomplishments towards the understanding, appreciation, and preservation of California native plants.

Copyright © 1999-2014 California Native Plant Society. All rights reserved. Contact Us