Boechera canadensis (Sickle-pod)

Plant Info
Also known as: Canadian Rockcress
Genus:Boechera
Family:Brassicaceae (Mustard)
Life cycle:biennial
Origin:native
Habitat:part shade, shade; dry open woods, rocky slopes
Bloom season:May - July
Plant height:1 to 3 feet
Wetland Indicator Status:none
MN county distribution (click map to enlarge):Minnesota county distribution map
National distribution (click map to enlarge):National distribution map

Pick an image for a larger view. See the glossary for icon descriptions.

Detailed Information

Flower: Flower shape: 4-petals Cluster type: raceme

[photo of flowers] An elongating raceme at the top of the stem and occasional branching stems in the upper part of the plant. Flowers are about ¼ inch long with 4 narrow, blunt-tipped white petals and 6 yellow stamens. The petals are spreading and about half again as long as the 4 sepals that form a round cup at the base of the flower. Each flower is on a long slender sparsely hairy stalk.

Leaves and stem: Leaf attachment: alternate Leaf attachment: basal Leaf type: simple

[photo of leaves] Stem leaves are 1 to 4 inches long, to 1 inch wide, pointed at the tip and tapering at the base, hairy to varying degrees, with irregular fine teeth and no leaf stalk, becoming smaller as they ascend the stem. Basal leaves are stalked, more spatula shaped and may have a few shallow lobes; they typically shrivel up by flowering time. The stem is typically hairy near the base and hairless in the upper part of the plant.

Fruit: Fruit type: capsule/pod

[photo of fruit] Fruit is a slender, flattened scythe-shaped pod 3 to 4 inches long, containing a single row of seeds. The pods are more or less straight and horizontal when first forming, then become curved and drooping.

[photo of seed] The small seeds are egg to heart-shaped and winged with a fine papery wrapping that help carry them off in the wind.

Notes:

Sicklepod is more commonly known as Arabis canadensis, but recent DNA testing has moved it to genus Broechera. Sicklepod does not typically form colonies—I don't think I've ever seen more than a couple plants together in any location. They tend to be widely scattered. Many plants (formerly) in the Arabis genus are similar in overall structure with similar flowers. Sicklepod is distinguished by the leaf shape, narrow spreading flower petals that are about half again as long as the sepals, and the flattened curved pods. Spreading-pod Rockcress (Boechera grahamii, or Arabis divaricarpa) is the most common rockcress in Minnesota and probably the most likely to be confused with Sicklepod. The former has much larger petals on the flowers, and the fruit remains mostly horizontal, not drooping like Sicklepod.

Please visit our sponsors

  • Wild Ones Twin Cities Chapter

Where to buy native seed and plants ↓

Map of native plant purveyors in the upper midwest

  • Prairie Restorations - Bringing people together with the land
  • Shop for native seeds and plants at PrairieMoon.com!
  • Shooting Star Native Seeds - Native Prairie Grass and Wildflower Seeds
  • Morning Sky Greenery - Native Prairie Plants
  • Minnesota Native Landscapes - Your Ecological Problem Solvers

More photos

Photos by K. Chayka taken at Wild River State Park, Chisago county. Photos courtesy Peter M. Dziuk taken in Winona county.

Comments

Have you seen this plant in Minnesota, or have any other comments about it?

Posted by: Jason - Blue Earth County
on: 2013-07-26 23:25:45

Williams Nature Preserve

Posted by: Brian - St. Peter
on: 2014-07-13 00:16:22

This plant was in flower on a partly-shaded slope (an oak savanna restoration area)at Ottawa Bluffs Preserve (The Nature Conservancy)in Le Sueur County on June 19. It was in both flower (toward ending) and fruit during a visit on July 3.

Post a comment

Note: All comments are moderated before posting to keep the riff-raff out. An email address is required, but will not be posted—it will only be used for information exchange between the 2 of us (if needed) and will never be given to a 3rd party without your express permission.

For info on subjects other than plant identification (gardening, invasive species control, edible plants, etc.), please check the links and invasive species pages for additional resources.



(required)




Note: Comments or information about plants outside of Minnesota and neighboring states may not be posted because Id like to keep the focus of this web site centered on Minnesota. Thanks for your understanding.