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Hoary cress

Scientific Name
Cardaria draba
Scientific Author
(L.) Desv
Taxonomy
(Magnoliophyta: Magnoliopsida: Capparales: Brassicaceae )
Reliability
High
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Diagnostic Images

Silicle Dorsal
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Caption
Seed Project
Source
Clare McLellan Museum Victoria
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Diagnostic Images (9)
Other Images (2)
Diagnostic Notes
Pictured:

Fruit (a two chambered silicle separating into a 1 - 2 seeded unit) and seed(s)

Description:

Fruit appendages: Central groove, Ridges

Fruit colour: Yellow

Fruit Length: 2 - 4mm, 7 - 10mm

Fruit shape: Cordate (Heart shaped) with two halves

Seed Colour: Variable - red/purple

Seed Length: 1 - 2mm

Seed Sculpture: Granular

Seed Shape: Elliptic oblong

Fruit a 2-chambered silicle with 1–2 seeds per chamber, cordate, compressed in cross-section, 2–4 mm tall, 3–5 mm broad, with conspicuous reticulation on surface.

Seeds elliptic to obovate with a notched, bluntly pointed base, 1.2–2.2(3) mm long, 1.0–1.5(1.7) mm wide, (0.5)1.0–1.25 mm thick, cotyledon edge thicker than radicle edge, cross sectional outline ovate. Testa dull, dark reddish-brown or deep purplish-red, sometimes with yellowish tinge. A faint groove or line runs from the base, gradually veering away from the margin and ending at about the middle or upper one-fourth of the seed. Surface minutely granular. Hilum in basal notch, inconspicuous, often hidden beneath funiculus or funicular material. Embryo bent, cotyledons incumbent, radicle same length as cotyledons; endosperm nearly absent. (Scher, J. L. and D. S. Walters. 2010. Federal noxious weed disseminules of the U.S. California Department of Food and Agriculture, and Center for Plant Health Science and Technology, USDA, APHIS, PPQ)
More Information
Author
Clare McLellan
Created
21/02/2012 02:36 AEST
Last Updated
17/01/2013 15:54 AEST
Citation
Clare McLellan (2012) Hoary cress (Cardaria draba) Updated on 1/17/2013 3:54:21 PM Available online: PaDIL - http://www.padil.gov.au.
Image Use
Free for use under the Creative Commons Attribution 3.0 Australia License

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