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ERYSIMUM PEROWSKIANUM. 



(Perowski's Erysimum.) 

 LINNEAN SYSTEM. Nq NATURAL ORDER. 



TETRAD YNAMIA SILIQUOSA. CRUCIFER.E. 



GENERIC CHARACTER. 

 Erysimum (G^bt.) Siliqua tetragona. Calyx clausus. Cotyledones planse, oblongae. 

 (Be Cand. Prod. vol. i. p. 196.) 



Siliqua four-sided. Calyx closed. Cotyledons flat, oblong. 



SPECIFIC CHARACTER. 



E. Perowskianum ; armuum : foliis petiolatis lanceolatis remote serratis. Petalis obovatis, 

 siliquis arcuatis. Stigmatibus subglobosis crassis. 



Annual : leaves petiolate, lanceolate, remotely toothed ; petals obovate ; seed-vessel bowed ; 

 stigmata somewhat globose, fleshy. 



Erysimum Perowskianum, Fisch et Meyer, Ind. Quant. Sem. Petropol. p. 36. 



Descb. — Stem annual, about eighteen inches high, slightly branched, covered over with 

 close appressed hairs ; leaves alternate, petiolate, lanceolate, remotely toothed, minutely covered 

 with forked hairs ; flowers large, yellow, capitate, shortly pedunculate ; petals obovate, margin 

 entire, unguis as long as the calyx ; calyx greenish, covered with appressed hairs ; filaments 

 smooth, flat, the longest reaching to the apex of the stigma ; anthers greenish, linear, joined to 

 the filaments nearly at the base, and affixed in a nearly upright position ; style somewhat 

 pubescent, one third of the length of the siliqua ; stigma large capitate, fleshy ; siliqua four- 

 sided, somewhat pubescent ; seeds oblong, covered with a brown pellicle. 



This species belongs to the third section {Erisyma strum) of De Candolle's 

 system. It is allied, according to Fischer and Meyer, (from whom it received its 

 name,) to E. altaicum, ochroleucum, canescens, Andrzejoskianum, exaltatum, and 

 robustum. From E. altaicum and ochroleucum it differs in its duration, being 

 only annual, and the unguis of the petals not exceeding the length of the calyx, 

 also in having the hairs on the siliqua forked, and the style more elongated. 

 By almost the same characters it may be distinguished from E. canescens, 

 Andrzejoskianum, and exaltatum. From E. robustum it is separated by its hairs 

 being forked, not three or four parted. Such are the distinctions published in 

 the seed list of the St. Petersburgh Garden, some of which we think are entitled 

 to little notice. 



This is a pretty, hardy annual, bearing a profusion of orange- coloured flowers, 

 which are of a size much larger than are usually found in this genus. It is a 



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