117 



CHEIRANTHUS OCHROLEUCUS. 



(Pale yellow Wall-flower.) 



LINNE AN SYSTEM. __ , „■ NATURAL ORDER. 



No. 120. 



TETR ADYNAMIA SILIdUOSA. CRUCIFER^E. 



GENERIC CHARACTER. 



Cheiranthus (Brown.) Siliqua teres aut compressa. Stigma bilobum aut capitatum. 

 Calyx basi bisaccatus. Semina 1-serialia ovata compressa (o=). (Decand. Prod. vol. i. p. 135.) 



Siliqua round or compressed. Stigma two-lobed or capitate. Calyx bisaccate at the base. 

 Seeds arranged in one row, ovate, compressed. Cotyledons accumbent. 



SPECIFIC CHARACTER. 



C. ochroleucus. Suffruticosus adpressis pilis vestitus ; foliis linearibus ; floribus ochroleucis 

 capitatis breviter pedicellatis ; petalis subrotundis, unguibus longissimis ; stigmate bilobato. 



Suffruticose, clothed with appressed hairs; leaves linear; flowers of a pale yellow colour, 

 capitate, shortly pedicellate ; petals roundish, entire, claws very long ; stigma two-lobed. 



Descr. — Suffruticose. Stem angular, about twelve inches high, covered with closely 

 appressed white hairs. Leaves numerous, linear, entire, scattered, of a palish-green colour, 

 covered over with the same kind of pubescence as the stem. Flowers shortly pedicellate, 

 arranged in a head. Petals of a pale yellow colour, roundish, delicately veined, longly clawed. 

 Stamens four long and two shorter, all smooth and flat, the longer ones the length of the claws 

 of the petals. Calyx half an inch long, tipped with brown. Anthers two-celled, dehiscing 

 lengthwise. Ovarium four-sided, which, together with the style and stigma, is the length of the 

 longer stamens. Style short. Stigma two-lobed. 



This is a very delicate and sweet-scented species, now growing in the gardens 

 of the Birmingham Botanical and Horticultural Society ; where it was raised 

 from Russian seeds received through the late Mr. Hunneman, in the year 1836. 

 Mr. Cameron, the curator of the above establishment, believes that it was sent 

 under the name of Cheirinia sessiliflora ; but the tally has been lost, and therefore 

 it is doubtful under what name it was introduced. It is, however, certain that 

 it is not a Cheirinia — which genus is considered as synonymous with Erisymum — 

 for the cotyledons are accumbent, and not incumbent, as they are in Erisymum. 

 It has been published, we believe, in this country, under the name of Cheiranthus 

 tenuifolius by LTHeritier; but if we may judge from the detailed character of this 

 plant in De CandonVs systema, it is certainly very different from ours. In the 

 present species, the stem is certainly not round and slender, but angular and stiff ; 



