PLATE 2. 



HARE'S-EAR MUSTARD, Conringia orientalis (L.) Andrz. 



Other English names : Rabbit-ear, Hare's-ear Cabbage, Klinkweed. 

 Other Latin names : Erysivium orientale, E,. Br. ; Brassica orientalis, 

 L. ; Brassica perfoliata, Lam. ; Conringia orientalis, Reich. 



(Noxious: Dom., Man., N.W.) 



Annual and winter annual. Introduced from Europe, probably with 

 flax seed, about 1892, now general throughout Manitoba and the North-west. 

 Stems erect, with a few branches, 1 to 4 feet high. Whole plant perfectly 

 smooth and glaucous (grayish green), with the appearance of a cabbage, 

 when young. Leaves fleshy, entire, near the root obovate, gradually nar- 

 rowed to the base; on the stiff stems, which become very wire-like when ripe, 

 oblong oval, shaped like a hare's or a rabbit's ear, clasping the stem by two 

 rounded auricles. Flowers creamy white, \ inch across. Pods square, 3 to 4 

 inches long. Seeds [Plate 55, fig. 44 — twice nat. size and enlarged 4 times] 

 dark brown, rounded oblong, pointed at the scar end, yV of an inch long, 

 granular-roughened; when soaked iu.water, covered with a thick pile of short 

 erect white mucilaginous hairs. 



Time of Flowering : End of Jime ; seeds ripe August to September. 



Propagation : By seeds. 



Occurrence : In grain fields, on stubble and by roadsides wherever grain 

 is carried. 



Injury : This succulent plant absorbs much moisture from the soil, very 

 little grain growing where there is a patch of it. The wiry stems are hard 

 to liiiul and an infested crop requires more labour to handle and much more 

 twine to bind it. 



Remedy: Pull by hand. If in large quantity, summer fallow. Disk 

 stubbles in fall or early spring to kill plants which germinate after harvest 

 and live over winter. 



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