[Rockcresses: The Genera Arabis, Boechera and Turritis in the Columbia River Gorge of Oregon and Washington]

Towermustard, Tower Mustard, Tower Rockcress

Turritis glabra

Synonyms: Arabis glabra, Arabis glabra var. furcatipilis, Arabis glabra var. glabra

Inflorescence of Towermustard, Tower Mustard, Tower Rockcress: Turritis glabra (Synonyms: Arabis glabra, Arabis glabra var. furcatipilis, Arabis glabra var. glabra)

The photo above shows a close-up photo of the terminal raceme of tightly compressed flowers of tower rock cress as seen at a rock quarry at about 4100' at the end of Road K6900 on the southeastern slopes of Mt. Adams.......June 13, 2005. The plants seen at this site were all over one meter in height. All the photos on this page were taken at this site.

Fruit of Towermustard, Tower Mustard, Tower Rockcress: Turritis glabra (Synonyms: Arabis glabra, Arabis glabra var. furcatipilis, Arabis glabra var. glabra)

The photo above shows a close-up of the long, narrowly cylindrical seed pod of tower rock cress. The pods are held erect and tightly compressed to the stem, and are only slightly flattened in cross-section.

Stem leaf of Towermustard, Tower Mustard, Tower Rockcress: Turritis glabra (Synonyms: Arabis glabra, Arabis glabra var. furcatipilis, Arabis glabra var. glabra) - Basal leaf of Towermustard, Tower Mustard, Tower Rockcress: Turritis glabra (Synonyms: Arabis glabra, Arabis glabra var. furcatipilis, Arabis glabra var. glabra)

The photo at left shows the broadly ovate-lancelolate stem leaves of tower rock cress. The blades are somewhat glaucous, strongly clasping at the base (See photo at bottom of page.) and overlapping adjacent stem leaves. The photo at right shows the scalloped leaf margin of a basal leaf of tower rock cress. The basal leaves are oblanceolate in outline and fairly densely covered with stiff, spreading simple hairs or star-shaped hairs.


Stem leaf of Towermustard, Tower Mustard, Tower Rockcress: Turritis glabra (Synonyms: Arabis glabra, Arabis glabra var. furcatipilis, Arabis glabra var. glabra) - Stem leaf of Towermustard, Tower Mustard, Tower Rockcress: Turritis glabra (Synonyms: Arabis glabra, Arabis glabra var. furcatipilis, Arabis glabra var. glabra)

Close-up photos showing the clasping leaf base and some of the sparse, spreading hairs to be found on the lower stem of tower rock cress.........June 13, 2005.
Paul Slichter