﻿( 146 .) 



SISY'MBRIUM* *. 



Linnean Class and Order. TETRADYNA'MiAf, Sfliquo'saJ. 



Natural Order. Cruci'feRvE§, Juss. Gen. PI. p. 237. — Sni. 

 Gram, of Bot. p. 138. Engl. FI. v. iii. p. 153. — Rich, by Macgilliv. 

 p. 498. — Cruci'fer.e; subord. Notorhi'zEjE||; tribe, Sisym- 

 nniF.A-: ; Lindl. Syn. pp. 20 & 29. Introd. to Nat. Syst. of Bot. 

 pp. 14 to 18. — Loud. Hort. Brit. p. 498 ; and Mag. of Nat. Hist, 

 v. i. pp. 143 & 240. — Rosales; subord. Rhceadosa?:; sect. 

 Rhaeadin.® ; type, Brassicace^e ; subty. SisymbriDjE ; Burn. 

 Outl. of Bot. pp. 614, 784, 847, 854, & 858. 



Gen. Chau. Calyx (fig. 1.) inferior, of 4 somewhat spreading, 

 oblong, concave, slightly coloured, deciduous sepals, nearly equal 

 at the base. Corolla (see fig. 2.) cruciform, of 4 oblong, blunt, 

 undivided, flat petals (fig. 4.), their claws nearly the length of the 

 calyx. Filaments (see fig. 3.) 6, thread-shaped, simple, distinct, 

 upright, 2 rather shorter than the other 4. Anthers oblong-heart- 

 shaped, a little spreading. Germen (see fig. 3.) strap-shaped, 

 slender, sessile. Style very short. Stigma capitate, notched, per- 

 manent. Pod ( siliqua ) cylindrical, or slightly angular; valves 

 strap-shaped, concave, wavy ; partition (dissepiment) narrow, mem- 

 branous. Seeds (see fig. 5.) ranged alternately, forming a single 

 row, numerous, small, egg-shaped, or oblong, not bordered. Coty- 

 ledons (see fig. 6.) flat, incumbent (o||), sometimes (according to 

 Dr. Brown) obliquely. 



The nearly cylindrical pod; capitate notched stigma; and calyx 

 nearly equal at the base ; will distinguish this from other genera 

 with flat, incumbent cotyledons , in the same class and order. 



Three species British. 



SISY'MBRIUM IRIO^I. London Rocket. Broad-leaved Hedge- 

 Mustard. 



Spec. Char. Stem and leaves smooth. Leaves runcinate, 

 toothed. Calyx and Pods spreading. 



Engl. Bot. 1. 1631. — Curt. FI. Lond. t. 311. — Jacq. FI. Austr. t. 322. — Linn. 

 Sp. PI. p. 921.— Huds. FI. Angl. (2nd ed.) p. 297.— Sm. FI. Brit. v. ii. p. 705. 

 Engl. FI. v. iii. p. 197.— With. (7th ed.) v. iii. p.773. — Lindl. Syn. p. 29. — 

 Hook. Brit. FI. p. 305. — Sibth. FI. Oxon. p. 207.— Relh. FI. Cantab. (3rd ed.) 

 p. 267.— Hurt. Midi. FI. v. iii. p. 57. — Johnston’s FI. of Berwick, v. i. p. 14-5. — 

 Walk. FI. of Oxf. p. 190. — Mack. Catal. of PI. of Ireland, p. 62. — Sisymbrium 

 lutifolium, Gray’s Nat. Arr. v. ii. p.679. — Erysimum latifolium neapolita- 

 num , Bay’s Syn. p. 298. 



Fig. 1. Calyx.— Fig. 2. Calyx and Corolla.— Fig. 3. Stamens, Germen, Style, 

 and Stigma.— Fig. 4. A separate Petal.— Fig. 5. A Pod, opening from the 

 base, and showing the two valves, the dissepiment, and the seeds. — Fig. 6. The 

 Seed, with the testa removed, showing the incumbent cotyledons. All, except 

 figures 1 & 5, more or less magnified. 



* Sisumbrion was the Greek name of some aquatic plant. It appears to have 

 hid an agreeable smell. Ovid advises that Vesus should be propitiated with 

 garlands of myrtle, of ro*es, and of sisymbrium. It is, however, more p obably 

 derived horn sisibos, Gr. a fringe ; as some of the species have fringed roots. 

 Dov. 



t See Dr aba verna, folio 38. f See Erysimum cheiranthoides, f. 62. 



4 See Uraba verna. f. 38, a. || See Erysimum cheiranthoides, f. 62. 



If From eruo, Gr. to cure ; see Erysimum, folio 62. 



