SINAPIS. ALYSSUM. 33 



2. & arveri sis (Li.) ; pods subcylindrical knotty lonyer than the 

 conical compressed beak, valves 3-veined, 1. ovate the lowermost 

 sublyrate stalked, upper 1. sessile. E. B. 1748. R. ii. 86. 

 B. sinapistrum Boiss. Scabrous. Fl. large, yellow. Pods 

 glabrous or rough with deflexed bristles; beak with one seed ; 

 valves with faint intermediate veins. Stem 1 1J foot high. 

 Corn-fields. A. VI. VIII. Charlock. E. S. I. 



t3. S. al'ba (L.) ; pods cylindrical knotty shorter than the 

 swordshaped beak, valves 5- veined, 1. lyrate pinnatitid irregularly 

 lobed.jE B. 1677. JR. ii. 85. B. alba Boiss. Fl. large, yellow. 

 Pods hispid. St. 12 feet high. Cultivated and waste cal- 

 careous land. A. VII. White Mustard. E. S. I. 



[S. incdna (L.) ; pods adpressed thick prominently veined 

 with a short \-seeded beak, 1. lyrate hispid, stem-1. linear-lan- 

 ceolate, st. much branched. E. B. S. 2843. B. adpressa Bois.- - 

 St. 1 3 feet high, branches divaricate with few very small 

 leaves. Pods very short, glabrous or hairy, often scarcely 

 longer than their glabrous beak. Sandy places in Jersey and 

 Alderney. B. VII. VIII.] 



14. DJPLOTAX'IS Cand. Wall-Mustard. 



1. D. tenuifolia (DO.) ; st. woody below branched sufytitbrous 

 leafy, 1. glaucous linear-lanceolate very acute sinuate -dentate or 

 pinnatifid, segments linear remotely dentate, ped. very long, 

 pet. roundish-obovate with a short claw. Sinapis Sm. E. Jti. 

 525. Fl. large; pet. blunt but slightly acuminate. St. 1 11- 

 foot high. Plant foetid:" Old walls. "P. VII. IX. E. S. I. 



2. D. murdlis (DC.) ; st. herbaceous simple hispid and leafy at 

 the base, L almost glabrous ovate-lanceolate sinuate-dentate or 

 pinnatifid, ped. as long as expanded flower, pet. roundish-ovate 

 with a short claw. Sinapis Sm. E. B. 1090. Pedicels as long* 

 as the flowers. Pet. abrupt or emarginate. L. often blunt 

 never very acute. We have two forms : (1)1. all radical in a 

 rosette and st. simple ; (2) /3. Babingtonii (Sy.), base of st. leafy 

 with axillary branches. Waste ground. A, VIII. IX. E. S. ?t. 



Suborder II. Latisepta. Tribe IV. Alyssinece. 



15. ALTS' SUM Linn. 



*1. A. alyssoides (L.) ; herbaceous hoary with starry pubes- 

 cence, 1. obovate-lanceolate attenuate below, pods orbicular 



c5 



