Downingia bella
Encyclopedia
Downingia bella, also known as Hoover's calicoflower or Hoover's Downingia, is a member of the Bellflower Family (Campanulaceae
Campanulaceae
The family Campanulaceae , of the order Asterales, contains about 2000 species in 70 genera of herbaceous plants, shrubs, and rarely small trees, often with milky non-toxic sap...

). The genus is named after A.J. Downing (1815-1852) a noted American horticulturist and landscape architect.

This native annual herb is endemic to California
California
California is a state located on the West Coast of the United States. It is by far the most populous U.S. state, and the third-largest by land area...

 and found in valley grassland communities. Its habitat is wetlands, generally vernal pool
Vernal pool
Vernal pools, also called vernal ponds or ephemeral pools, are temporary pools of water. They are usually devoid of fish, and thus allow the safe development of natal amphibian and insect species...

s between 4600 and 5250 feet (1400 to 1600m). As approximately 90% of vernal pools in California have been lost, D. bella is uncommon. The range of D. bella is scattered from locations in Riverside County to areas in the Great Central Valley.

Description

Like all Downingia, the stem is decumbent to erect with leaves that are along the stem and often fall before the plant flowers.

The flowers are sessile and in a spike inflorescence with individual flowers having a corolla length of 10 to 12 mm. The corolla is glabrous and has 2 distinct lips, the upper with 2 lobes and lower with 3 lobes. The upper lobes are narrowly triangular or elliptic in shape while the lower lobes are obtuse and abruptly toothed. The corolla is blue with the lower lip having a central white field which then has two yellow spots (can be joined) in its middle. At the throat D. bella has 2 raised nipples that generally have 3 alternating purple spots.

The 5 fused stamens have anthers that are included in the corolla tube and are angled less than 45 degrees to filaments. The inferior ovary is pedicel-like and is 2 chambered.

The fruits of D. bella are between 16 to 18 mm with tough lateral walls that are tardily dehiscent despite no noticeable translucent lines. The seeds within the fruit are longitudinally striate.

Some areas in northern Sutter County have D. bella with a minute corolla horn similar to D. ornatissima
Downingia ornatissima
Downingia ornatissima is a species of flowering plant in the bellflower family known by the common name folded calicoflower. This showy wildflower is endemic to California, where it is a resident of vernal pools and other wet places in the Central Valley. This annual grows an erect, branching stem...

.

Sources

The source of this article is wikipedia, the free encyclopedia.  The text of this article is licensed under the GFDL.
 
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