240 FLORA OF JAMAICA Sisymbrium 



[SISYMBRIUM L. 



Radical leaves spreading, cauline often auriculate-amplexicaul. 

 Flowers generally yellow or white. Sepals equal or subsaccate 

 at base. Petals often narrow and long clawed. SiJiqua awl- 

 shaped-linear, adpressed to the rhachis. Seeds generally many, 

 in one row ; cotyledons incumbent. Hedge-mustard. 



Species 50, mostly natives of Europe, Siberia and western Asia 

 as far as India, a few of temperate and subarctic N. America, 

 and a very few of the northern hemisphere. 



S. officinale Scojj. FJ. Carniol. eel 2, ii. 26 (1772) ; Macf. 

 Jam. i. 27; Griseh. Fl. Br. W. Ind. 13; Eiclil. in Fl. Bras. xiii. 

 pt. 1, 303; Britton in Torrei/a vi. 31. Erysimum officinale 

 L. Sp. PI. 660 (1753). Type in Herb. Linn. 



In fl. throughout the year; "not uncommon in Port Royal Mts.'* 

 Macfadyen ; Hart \ Bermuda, Hispaniola. Native of Europe. Natural- 

 ised in N. America and West Indies. 



Annual plant, more or less hairy with recurved hairs. Ste77i 1 to 2 ft. 

 high, with branches spreading more or less at right angles. Leaves 

 runcinate, lower 6-8 cm. 1., upper smaller. Raceme very short and crowded 

 in flower, much elongated afterwards. Flowers 2*5-3 mm. 1. Sepals 

 1*5-2 mm. 1. Petals yellow. Siliqua 1-1 -4: cm. 1., at base 1-1*5 mm. br., 

 pungent, erect, closely pressed to the rhachis.] 



[BRASSICA L. 



Erect herbs, the radical leaves pinnatifid. Racemes long, 

 leafless. Flowers generally yellow. Ovary with 12 to 24 ovules. 

 Siliqua nearly terete, narrowing into the linear beak, spreading 

 away from rhachis ; valves convex with one prominent nerve 

 and the 2 lateral flexuose ; partition as wide as the valves. 

 Seeds in one row, subglobose. Cotyledons conduplicate. 



Species about 50, natives of the Mediterranean Region, and 

 of central Europe and of central and east Asia. 



B. integrifolia 0. E. Sclmlz in TJrh. Symh. Ant. Hi. 509 (1903). 

 B. lanceolata Lange Fl. Danica fasc. xlv. 7, t. 2658 (1861). 

 B. juncea Hitchc. in Bep. 3Iiss. Bot. Gard. 1893, 58 (non Coss.) ; 

 Kew Bull. 1893, 236. Sinapis integrifolia West Bidr. Ste Croix 

 296 (1793); Willd. Rort. Berol. t. 14 (1816). S. lanceolata 

 DC. Syst. a. 611 (1821); Macf. Jam. i. 31. S. brassicata 

 Griseh. Fl. Br. W. Ind. 14 (1859) (non L.). Sinapi foliis &c. 

 Shane Gat. 79 & Hist. i. 193, t. 122,, f. 2. Type in Herb. Mus. 

 Brit. 



Wild Mustard. 



" Cultivated places," Shane Herb. iii. 108 ! common in the Port Royal 

 Mts., Macfadyen; Lucea, Hitchcock. Apparently spontaneous in the 

 West Indies. Native of southern and (iastern Asia. 



