Nick Jensen: TWO NEW SPECIES OF STREPTANTHUS: from the San Bernardino Mountains in San Bernardino County

[https://rareplants.cnps.org] Range: Background and Taxonomy Streptanthus juneae N.Jensen is a perennial herb in Brassicaceae known only from the foothills of the San Bernardino Mountains, San Bernardino County. (contributed by Mary Ann Machi)

[https://rareplants.cnps.org] Ecology: Ecology Streptanthus juneae is found between 2,155 to 2,370 meters in elevation (Google LLC 2020 via Jensen 2020 and Jensen, N. pers. comm. 2020), typically on moderate slopes of varying aspects to flat areas, in the understory of open forested areas dominated by Pinus jeffreyi, Abies concolor, and Quercus kelloggii. A single occurrence at Clark?s Grade (record 4) is within openings of montane chaparral dominated by Ceanothus cordulatus resulting from recent logging activity. Plants flower from early June into late August. Fruit set begins in late June and continues into September, with fruits dehiscing in late September (Jensen 2020). Its flowers have been observed to be frequently visited by native bees, particularly Osmia sp. (Megachilidae). Associated species include: Bromus tectorum, Elymus glaucus, E. elymoides, Ericameria nauseosa, Eriogonum spp., Gayophytum diffusum subsp. parviflorum, Penstemon grinnellii, P. rostriflorus, and Poa secunda (Jensen 2020). (contributed by Mary Ann Machi)