3<5 



THALAMIFLORJE 



7. B. sinapis (Charlock, Wild Mustard). Pods with many angles, 

 rugged, longer than the awl-shaped beak, spreading ; leaves rough, 

 toothed ; plant 1-2 feet high ; flowers bright yellow. A common 

 and most pernicious weed in cornfields, sometimes springing up 

 profusely from ground which has recently been disturbed, though 

 unknown there before. Fl. all the summer. Annual. 



8. B. nigra (Black Mustard). Pods quadrangular, smooth 

 slightly beaked, close pressed to the stalk ; lower leaves pinnate, 

 with rounded terminal lobe ; upper leaves narrow, pointed, un- 

 divided, smooth. Taller than either of the preceding, but bearing 

 smaller flowers. The seeds yield the well-known table condiment. 

 Fl. June, July. Annual. 



9. B. adpressa. Resembling the last, but the foliage is hoary, 

 the pods short, beaked. Found in the Channel Islands. Biennial. 



24. Raphanus (Radish) 



1. R. Raphanistrum (Wild Radish). 

 A bristly or almost prickly plant ; leaves 

 horizontal, pinnate, with rounded ter- 

 minal lobe ; flowers rather large, straw- 

 coloured, veined with purple ; well dis- 

 tinguished when in seed by its jointed 

 1 -celled pods. Fl. all the summer. Annual. 

 Cornfields. 



A variety named R. maritimus, which 

 grows on sea-cliffs, has its leaves com- 

 posed of large and small leaflets arranged 

 alternately. In both varieties the flowers 

 are sometimes almost white. 



Raphanus Raphanistrum An interesting cruciferous plant, rare 

 {Wild Radish) in England and not indigenous, is Isatis 



tinctoria : erect, smooth, glaucous, 1-3 

 feet high. It was with this plant Woad that the Ancient Britons 

 stained their bodies blue, and it is still in use as a dye. 



Natural Order VII 

 RESEDACE.ZE. The Mignonette Tribe 



Sepals 4-6, narrow ; petals unequal, ragged, or fringed at the 

 back ; stamens 10-24, inserted as well as the petals on an irregular 

 disc, which is placed on one side of the flower ; stigmas 3, sessile ; 

 ovary 3-lobed, i-celled, many-seeded, open at the summit ; seeds 

 in 3 rows. Herbaceous or somewhat shrubby plants, with alter- 

 nate leaves and minute stipules- having their flowers in racemes 01 



