SEARCH AND WILDFLOWER
HOME PAGE BLUE
FLOWERS CONTACT
US
According to Polemoniaceae expert, J. Mark Porter, the photographs on this page are Eriastrum diffusum, not Eriastrum sparsiflorum, but the plants key to Eriastrum sparsiflorum using Stanley Welsh's A Utah Flora and Cronquist's Intermountain Flora. William Weber's 2012 edition of Colorado Flora: Western Slope lists only Eriastrum diffusum, as does Ackerfield's Flora of Colorado. The descriptions given by Weber and Ackerfield do not fit the plant shown in the photographs below. For an incredibly thorough revised taxonomy for the genus Eriastrum, see Sarah De Groot's 2016 "Tomus Nominum Eriastri: The Nomenclature and Taxonomy of Eriastrum" Based on De Groot's range maps, the species shown below is Eriastrum diffusum subsp. utahense. I will ask Ms De Groot to review the photographs below, but it appears certain that Welsh et al., cited above, used incorrect morphological characteristics in their keys. |
|
Eriastrum
sparsiflorum (Sparse Starflower) Polemoniaceae (Phlox Family) Semi-desert. Sandy openings. Spring. This dainty beauty can grow branched to about ten inches tall but often remains unbranched and two-to-five inches tall. The plant is very difficult to find and, in fact, these are the first published photographs of it in Colorado. It had never been found in the state until Marion Rohman and my wife, Betty, independently spotted it within three days of each other in several locations within ten miles of each other. Almost all plants found were just an inch or two tall. The flower opens around mid-morning; plants are, therefore, even more difficult to find before that time. This species was at first named Gilia sparsiflora by Alice Eastwood in 1902 from a specimen she collected in the Kings River Canyon, California, July 1899. In 1945 Herbert Mason moved the species to the genus Eriastrum (created by Elmer Wooton and Paul Standley in 1913). "Eriastrum" is from the Greek for "early star". |
||
|
Eriastrum
sparsiflorum (Sparse Starflower) Polemoniaceae (Phlox Family) Semi-desert. Sandy openings. Spring. These photographs show E. sparsiflorum in eastern Utah where it has seldomly been recorded. It is most commonly found in the far western states and in a few far western Utah counties; it is not found in New Mexico or Arizona.
|
||
|
Eriastrum
sparsiflorum (Sparse Starflower) Polemoniaceae (Phlox Family) Semi-desert. Sandy openings. Spring. |
||
|
Eriastrum
sparsiflorum (Sparse Starflower) Polemoniaceae (Phlox Family) Semi-desert. Sandy openings. Spring. All the above photographs show just one flower on each plant with a relatively slender swelling of the ovary below the petals. The photograph at left shows plants maturing with, from left to right, an increasing number of flowers clustered together and swelling the floral area.
|
Range map © John Kartesz,
County Color Key
|
Range map for Eriastrum sparsiflorum |