Revised classification in Sharples, M. T., & Tripp, E. A. (2019). Phylogenetic Relationships Within and Delimitation of the Cosmopolitan Flowering Plant Genus Stellaria L. (Caryophyllaceae): Core Stars and Fallen Stars. Systematic Botany, 44(4), 857–876. doi:10.1600/036364419x15710776741440

POWO is lagging; the change is being picked up by other highly regarded sources. See https://www.inaturalist.org/flags/473446

"Rabelera primarily differs from Stellaria in having square and ciliate stems, elongate leaves that are always sessile and lanceolate, bracts that are always leafy, and petals that are only bilobed one half of the petal length." (Sharples & Tripp 2019)