[The Mustard Family West of the Cascade Mountains of Oregon and Washington]

Rockcresses West of the Cascade Mountains of Oregon and Washington

The Genera Arabis, Boechera and Turritis

Brewer's Rockcress: Arabis breweri var. breweri

Brewer's Rockcress: Boechera breweri

Note: I have not updated the taxonomy for those species that have been split out into the genus Boechera.

Unidentified Rockcress: Boechera sp. - Can you help identify this species?

Waldo Rockcress: Arabis aculeolata -

Alpine Rockcress: Arabis alpina - Introduced.

Mountain Rockcress: Arabis caucasica - Introduced.

Eschscholtz's Hairy Rockcress, Pacific Coast Rockcress: Arabis eschscholtziana (Synonyms: Arabis hirsuta, Arabis hirsuta var. eschscholtziana, Arabis hirsuta var. glabrata) -

McDonald's Rockcress: Arabis macdonaldiana -

Modest Rockcress, Rogue Canyon Rockcress: Arabis modesta -

Olympics Rockcress: Arabis olympica (Synonym: Arabis furcata var. olympica) -

Oregon Rockcress: Arabis oregana -

Brewer's Rockcress: Boechera breweri ssp. breweri (Synonym: Arabis breweri var. breweri) -

Brewer's Rockcress: Boechera breweri ssp. shastaensis -

Calder's Rockcress: Boechera calderi (Synonym: Arabis calderi) -

Spreading Rockcress, Spreadingpod Rockcress, Spreading-pod Rockcress, Spreading Pod Rockcress: Boechera divaricarpa (Synonyms: Arabis divaricarpa, var. divaricarpa, Arabis x divaricarpa, Arabis xdivaricarpa var. divaricarpa) -

Howell's Flatseed Rockcress: Boechera howellii (Synonyms: Arabis howellii, Arabis platysperma, Arabis platysperma var. howellii) -

Koehler's Stipitate Rockcress, Shrubby Rockcress: Boechera koehleri (Synonyms: Arabis koehleri, Arabis koehleri var. koehleri, Arabis koehleri var. stipitata) -

Lemmon's Rockcress: Boechera lemmonii (Synonyms: Arabis lemmonii, Arabis lemmonii var. lemmonii) -

Lyall's Rockcress, Lyall's Slender Rockcress, Murry's Rockcress: Boechera lyallii (Synonyms: Arabis lyallii, Arabis lyallii var. lyallii, Arabis murrayi) -

Little-leaf Rockcress, Small-leaved Rockcress: Boechera microphylla (Synonyms: Arabis microphylla, Arabis microphylla var. microphylla, Boecher microphylla var. microphylla) -

Columbia Rockcress, Few-flowered Rockcress, Hairystem Rockcress, Sicklepod Rockcress, Small-flowered Rockcress: Boechera pauciflora (Synonyms: Arabis campyloloba, Arabis holboellii, Arabis holboellii var. pinetorum, Arabis sparsiflora, Arabis sparsiflora var. subvillosa, Boechera sparsiflora var. subvillosa) -

Small-flowered Rockcress: Boechera paupercula (Synonym: Arabis lyallii var. nubigena) -

Dangle-pod Rockcress, Dropseed Rockcress: Boechera pendulocarpa (Synonym: Arabis holboellii var. pendulocarpa) -

Holboell's Rockcress, Woodland Rockcress: Boechera pinetorum (Synonyms: Arabis holboellii, Arabis holboellii var. pinetroum, Boechera holboellii) -

Broad-seeded Rockcress, Pioneer Rockcress: Boechera platysperma (Synonyms: Arabis platysperma, Arabis platysperma var. platysperma) -

Meadow Rockcress: Boechera pratincola (Synonym: Arabis x divaricarpa) -

Bristly-leaved Rockcress: Boechera rectissima (Synonyms: Arabis rectissima, Arabis rectissima var. rectissima) -

Reflexed Rockcress, Secund Rockcress: Boechera retrofracta (Synonyms: Arabis exilis, Arabis holboellii, Arabis holboellii var. retrofracta, Arabis holboellii var. secunda, Arabis retrofracta, Arabis secunda, Boechera holbellii, Bochera hoboellii var. secunda) -

Elegant Rockcress, Sicklepod Rockcress, Slender Rockcress: Boechera sparsiflora (Synonyms: Arabis arcoidea, Arabis campyloloba, Arabis peramoena, Arabis polytricha, Arabis sparsiflora, Arabis sparsiflora var. peramoena, Arabis sparsiflora var. sparsiflora, Boechera sparsiflora var. sparsiflora) -

Canadian Rockcress, Drummond's Rockcress: Boechera stricta (Synonyms: Arabis albertina, Arabis connexa, Arabis drummondii) -

Ashy Rockcress: Boechera subpinnatifida (Synonym: Arabis subpinnatifida) -

Tower Mustard, Tower Rockcress: Turritis glabra (Synonyms: Arabis glabra, Arabis glabra var. furcatipilis, Arabis glabra var. glabra) -

Paul Slichter E-mail