BRASSICACEAE

Arabis pycnocarpa M. Hopkins. Slender Rockcress. Phen: May-Jun. Hab: Thin soils near outcrops of calcareous soils. Dist: QC west to AK, south to e. and sw. PA (Rhoads & Block 2007), AR, and AZ, primarily west of the Blue Ridge. Reports of this taxon from GA (Fernald 1950, Kartesz 1999, Hopkins 1937) are based on material collected by A.W. Chapman near Rome, and later described as Arabis georgiana. See discussion under A. pycnocarpa var. adpressipilis.

Origin/Endemic status: Native

Syn: = K4, Al-Shehbaz (2017); = Arabis hirsuta var. pycnocarpa – C, F, G, GrPl, Pa, Al-Shehbaz (1988a), Rollins (1993); = Arabis pycnocarpa var. pycnocarpa – FNA7, Il, K3, Mi, NE, NY; = Arabis pycnocarpa var. typica – Hopkins (1937); < Arabis hirsuta var. pycnocarpa – K1

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