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|Family: Boraginaceae||View Description||Dichotomous Key|
|Genus: Plagiobothrys||View Description||Dichotomous Key|
|Species:||View Description||Dichotomous Key|
Plagiobothrys cognatus (Greene) I.M. Johnst.
Habit: Annual, strigose. Stem: prostrate to occasionally ascending, 0.5--2+ dm. Leaf: cauline, lower 2--7 cm. Inflorescence: bracts below middle to +- throughout. Flower: calyx 2--4 mm, strigose to spreading-hairy; corolla limb 1--2 mm diam. Fruit: nutlet 1.2--1.8 mm, +- flat, oblong-ovate, asymmetric, dull or shiny, brown; abaxial ridge low, short, near tip, lateral ridges obscure, cross-ribs few, low, scattered, interspaces wide, tubercled or papillate-dentate and scabrous-bristled; adaxial ridge beyond middle, generally folded to 1 side below; scar oblique, triangular, solid, generally +- flat, not sunken.
Ecology: Moist places in meadows, sagebrush flats, forests; Elevation: 1050--2520 m. Bioregional Distribution: KR, NCoRI, CaR, n&c SN, GB; Distribution Outside California: to eastern Washington, Rocky Mountains, Arizona. Flowering Time: May--Aug
Synonyms: Plagiobothrys scouleri (Hook. & Arn.) I.M. Johnst.nvar. penicillatus (Greene) Cronquist, in part
Unabridged Note: Collections western of the Sierran-Cascade, if verified, may indicate introductions there. Generally prostrate regardless of environmental factors, including elevation, while Plagiobothrys hispidulus, Plagiobothrys cusickii generally prostrate to decumbent at upper end of their elevation ranges. With Plagiobothrys bracteatus, Plagiobothrys cusickii, Plagiobothrys hispidulus (Oregon, Washington to Rocky Mountains, Canada), and others forming a widespread, highly variable polyploid complex of sometimes poorly defined taxa displaying degrees of morphologic, ecologic, and geographic separation in need of further study, although California material sorts into described species with a minimum of difficulty. At this time inclusion of this suite of variable, +- self-pollinating taxa with the coastal Pacific NW populations of Plagiobothrys scouleri is a matter of convenience without sound systematic basis and needing study.
eFlora Treatment Author: Ronald B. Kelley
Jepson Online Interchange
Previous taxon: Plagiobothrys chorisianus var. hickmanii
Next taxon: Plagiobothrys collinus
Citation for this treatment: Ronald B. Kelley 2017. Plagiobothrys cognatus, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/eflora/eflora_display.php?tid=38524, accessed on March 24, 2017.
Citation for the whole project: Jepson Flora Project (eds.) 2017. Jepson eFlora, http://ucjeps.berkeley.edu/eflora/, accessed on March 24, 2017.