210 



CRUCIFER^E. LIX. ERYSIMUM. 



Calyx closed. Cotyledons flat, oblong. Herbs biennial or peren- 

 nial, rarely suffrutescent at the base, usually branched, sometimes 

 smooth, sometimes pubescent or hairy. Leaves variable, usually 

 oblong-linear, entire, or toothed, stalked, sessile, or as in Corin- 

 gia, cordate, stem-clasping. Racemes elongated, terminal, many- 

 flowered ; pedicels filiform, bractless. Flowers yellow, rarely 

 cream-coloured or whitish. 



SECT. I. STYLONEMA (from orvXoe, stylos, a column or style, 

 rnpa, nema, a thread ; style filiform). D. C. syst. 2. p. 491. 

 prod. 1. p. 196. Style long, filiform ; stigmas 2, spreading 

 (f. 46. q.~). Calyx almost permanent. Flowers nearly sessile. 



1 E. SILICULO' SUM (D. C. syst. 3. p. 491.) pods shorter than 

 the style, younger pods covered with the permanent calyx ; 

 flowers on short pedicels ; leaves linear, quite entire. $ . H. 

 Native of the desert of Cumana in Tauria and about Astracan. 

 Cheiranthus siliculosus, Bieb. fl. taur. 2. p. 121. suppl. 443. 

 Syrenia siliculosa, Andrz. cruc. ined. Deless. icon. sel. 2. t. 65. 

 Flowers yellow. Siliques hoary. Plant canescent. 



Silicled Treacle-Mustard. Fl. May, June. PI. 1 to 2 feet. 



2 E. SI'CULUM (Spreng. new. entd. 3. p. 51.) pods shorter 

 than the style, prismatic, hoary, also the adult ones are covered 

 with the permanent calyx ; flowers on short pedicels ; leaves 

 linear, smoothish. $ . H. Native of Sicily. Flowers yellow. 



Sicilian Treacle-Mustard. Fl. Ju. Jul. Clt. 1824. PI. 1 ft. 



3 E. SESSILIFLO'RUM (R. Br. in hort. kew. ed. 2. vol. 4. p. 1 1 6.) 

 pods length of style, younger ones covered by the permanent 

 calyx ; flowers sessile ; leaves linear, entire, y. . H. Native 

 of the salt deserts and mountains of Siberia, and of Tauria, 

 also of Caucasus. Cheiranthus quadrangularis, Lher. stirp. 1. 

 p. 91. t. 44. Cheiranthus montanus, Pall. itin. 1. p. 496. no. 

 115. Cheir. cornutus, Lam. diet. 2. p. 717. Erysimum cor- 

 nutum, Pers. ench. 2. p. 200. Cheir. angulcitus, Schultz. 

 obs. p. 129. Syrenia Lamarckii, Andrz. cruc. ined. Stems at 

 base suffrutescent. Flowers sulphur-coloured, sweet-scented. 

 The stems, younger leaves, and calyx are whitish-grey. 



Sessile-flowered Treacle-Mustard. Fl. Ju. July. Clt. 1794. 

 PI. 1 to 2 feet. 



4 E. ANGUSTIFO' LIUM (Ehrh. beitr. 7. p. 155.) pods much 

 longer than the style, younger ones covered with the permanent 

 calyx ; flowers almost sessile ; leaves linear, entire. $ . H. 

 Native of Hungary and Transylvania in dry sandy plains. 

 Walds. et Kit. hung. 1. p. 101. t. 98. Cheiranthus virgatus, 

 Poir. suppl. 2. p. 781. Syrenia Ehrarti, Andrz. cruc. ined. 

 Cheirinia angustifolia, Link. enum. 2. p. 1 70. Flowers very like 

 those of E. sessiliflorum, but a little smaller. Plant canescent. 



Narrow-leaved Treacle-Mustard. Fl. June, Aug. Clt. 1800. 

 PI. \ to 2 feet. 



SECT. II. CUSPIDA'RIA (from cuspis, a point ; style). D. C. 

 syst. 2. p. 493. prod. 1. p. 197. Style filiform, short. Silique 

 tetragonal, 2- edged. Calyx falling off with the petals. Flowers 

 on short but distinct pedicels. 



5 E. CUSPIDA'TUM (D. C. syst. 2. p. 493.) pods thrice the 

 length of the style, 2-edged, naked ; flowers on short pedicels ; 

 leaves oblong-lanceolate, sinuately toothed. . H. Native of 

 Bithynia, Moldavia, Sicily, Tauria, Caucasus, and in Iberia near 

 Tiflis. Cheiranthus cuspidatus, Bieb. fl. taur. 2. p. 120. 

 suppl. 443. Cheiranthus Bithy'nicus, Pers. ench. 2. p. 200. 

 Syrenia Biebersteinii, Andrz. cruc. ined. Buxb. cent. 2. p. 23. 

 t, 33. f. 1. E. glabrum, Presl. ex Spreng. Sinapis tetraedra, 

 Presl. The cultivated plants are almost smooth, while the spon- 

 taneous ones are rather grey, especially on the stem, with ap- 

 pressed hairs, which are fixed by the centre, hence they are 

 2-parted. Flowers yellow. Seed ovate, obliquely truncate at 

 the top on both sides. 



C^H<fa<e-podded Treacle-Mustard. Fl. May, June. Clt. 

 1800. PI. 1 to 2 feet. 



6 E. RUPE'STRE (D. C. syst. 2. p. 494.) leaves somewhat 

 toothed, radical ones spatulate, cauline ones oblong, all pubes- 

 cent with 2 or 3-parted hairs ; stem suffruticose ; length of the 

 style exceeding the breadth of the pod. If. . fj . H. Native of 

 Bithynia on Mount Olympus. Cheiranthus rupestris. Smith, 

 fl. graec. t. 633. A tufted suffruticose, branched plant. Flowers 

 yellow, few, size of those of E. cuspidata. 



Rock Treacle- Mustard. Fl. May, June. PI. 1 foot. 



SECT. III. ERYSIMA'STRUM (altered from Erysimum). D. C, 

 syst. 2. p. 494. prod. 1. p. 197. Style short, or scarcely any. 

 Siliques 4-sided, (f. 46. q.) Calyx deciduous. Leaves not cordate, 

 nor stem-clasping. Flowers distinctly pedicelled. 



7 E. LEPTOSTYLUM (D. C. syst. 2. p. 494.) leaves lanceolate, 

 remotely toothed, pubescent with 3 or 4-parted hairs ; branches 

 few, rather upright ; petals somewhat orbicular ; pods erect ; 

 style filiform. $ . H. Native on the bank of the Lower Tanais, 

 about Charkovia, and on the sides of a mountain called Besch- 

 tau, in Caucasus. Cheiranthus grandiflorus, Bieb. fl. taur. 2. p. 

 117. suppl. p. 441, but not of Desf. Stem erect, sparingly 

 branched. Flowers yellow. Plant hoary. 



Slender-styled Treacle-Mustard. Fl. May, July. Clt. 1827. 

 PI. 1| foot. 



8 E. EXALTA'TUM (Andrz. in Bess. enum. cont. 2. no. 1554.) 

 canescent, scabrous ; leaves linear-lanceolate, narrowed at each 

 end, spreading, remotely denticulated ; pods erectly spreading ; 

 outer glands of receptacle 2-horned. $ . H. Native of Podolia. 

 Very like E. leptostylum. Flowers yellow. 



Exalted Treacle-Mustard. Fl. May, June. Clt. 1824. PI. 2 ft. 



9 E. SUFFRUTICOSUM (Spreng. nov. prov. p. 17. no. 36.) 

 stem suffruticose at the base ; leaves lanceolate, entire, pubes- 

 cent from 2-parted hairs ; pods erect ; length of style exceeding 

 the breadth a little. ^ . H. Native ? Cheiranthus fruti- 

 c6sus, Lher. herb. Stem branching much from the base. 

 Flowers at first corymbose, about a quarter the size of those of 

 Cheiranthus Cheiri, pale yellow, or almost citron coloured. Plant 

 very like Cheiranthus Cheiri. 



Suffruticose Treacle-Mustard. Fl. April, May. Clt. 1822. 

 PI. 1 to IA foot. 



10 S. ODORA'TUM (Ehrh. beitr. 7. p. 157.) stem branched ; 

 leaves lanceolate, deeply toothed, scabrous, with 3-parted hairs ; 

 claws of petals about equal in length to the calyx ; siliques 

 straight, elongated, crowned by a 2-lobed stigma. $ . H. Na- 

 tive of Hungary and Volhynia. S. strictum, var. fi, odoratum, 

 D. C. prod. 1. p. 197. Flowers yellow, sweet scented. 



Sweet-scented Treacle-Mustard. Fl. July. Clt. 1795. PI. 

 1 to 2 feet. 



HE. ROBU'STUM (D. Don, prod. fl. nep. 202.) leaves lan- 

 ceolate, mucronulate, toothed, tapering to the base, silky on both 

 surfaces ; siliques ascendant, puberulous, 5-times longer than the 

 pedicel ; stem angular, silky, branched. $ . H. Native of 

 Gosaingsthan. Stem stiff, heptagonal. Pedicels tetragonal. 

 Flowers yellow. Stigma broad. Siliques tetragonal. 



Robust Treacle-Mustard. PI. 2 feet. 



12 E. siRicTCM (Gaert. fl. wetter. 2. p. 451. no. 836.) leaves 

 lanceolate, toothed, pubescent from 3-parted hairs ; stem up- 

 right ; pods erect ; style very short, stigma 2-lobed. $ . H. 

 Native of Volhynia, Transylvania, Austria, and Dauphiny, in gra- 

 velly fields. E. Pannonicum, Crantz. aust. 28. E. hieracifolium, 

 Jacq. aust. t. 73. E. odoratum, Willd. spec. 3. p. 512. Chei- 

 rinia stricta, Link, enum. 2. p. 170. Stems 1 or 2 from the 

 same root. Flowers yellow. 



Straight-stemmed Treacle-Mustard. Fl.Jun. Aug. Clt. 1795. 

 PI. 1 to 2 feet. 



