crucifer.e. 149 



Plate 63. 

 ERYSIMUM, L. 



Siliqua tetragona, valvis uninerviis placentisque acute ca- 

 rinatis. Cotyledones oblongas, planae, incumbentes. — Calyx 

 erectus. Petala flava vel aurea. Folia angusta, integra, 

 haud amplexicaulia. 



Erysimum, Linn. Gen. 814. (excl. spec.) Gaertn. Fr. t. 143. R. Br. in 

 Ait. Kew. 1. c. p. 115. DC. Syst. 2. p. 491. (excl. § 1.) C. A. 

 Meyer, in Ledeb. Fl. Alt. 3. p. 147. Torr. & Gray, Fl. N. Am. 

 1. p. 97. Endl. Gen. 4908. 



Treacle-Mustard. False Wall-Flower. 



Calyx erect ; the sepals equal, or the lateral ones gibbous 

 at the base, and sometimes appendiculate or cornute at the 

 apex. Petals unguiculate, the slender claw erect, the di- 

 lated oblong or roundish lamina spreading. Glands 4. Fil- 

 aments subulate or filiform, toothless : anthers linear -oblong 

 or elliptical, often sagittate. Ovary linear, not stipitate : 

 style mostly short and thick : stigma capitate or two-lobed. 

 Ovules numerous, forming a single row in each cell. 



Silique linear, usually long and slender, and exactly four- 

 sided (the cross section square or rhombic), with four sharp 

 and nearly similar angles, two of them the projecting placen- 

 ta?, the others formed by the strong nerve which occupies 

 the middle of each carinate (and rather coriaceous) valve : 

 partition nerveless. Seeds numerous, pendulous on fili- 

 form or setaceous free funiculi, forming a single row in each 

 cell, oblong, turgid or somewhat three-sided, not margined. 

 Cotyledons plane, oblong, thickish, parallel with the pla- 

 centae and incumbent on the ascending radicle, which oc- 

 cupies the side remote from the placenta and is sometimes 

 oblique. 



Herbs, chiefly biennials, more or less scabrous with 

 closely appressed rigid hairs, which are two-parted (appear- 



