4. CRUCIFER^. 



23 



Pod without conspicuous nerves. 



slightly curved 



Seeds in 1 row in each cell. 



Pod quadrangular, 1-iierved 



Pod cylindrical, usually 3-nerved. 

 Pod without boak ; seeds oblong ... 

 Pod long-beaked : seeds globular. 

 Sepals spreading; seeds biting; 



green plants 



Sepals subercct ; seeds mild ; glau- 

 cous plants 



A. Pod not twice as long as broad, open- 

 ing by valves, compressed laterally, 

 partition narrow, at right angles to the 

 valves. 



Cells 1-seeded 



Cells several-seeded 



A. Pod indehiscent, usually 

 partitions. 

 Pod laterally compressed, 



of Lcpidirtm 



Pod cylindrical or conical. 



Pod of 2 superposed 1-seeded joints. 

 Upper joint with a blunt beak ; mari- 

 time plant 



I'pper joint with a pointed beak ; weed 

 Pod witlf a long beak and several seeds 



with transverse 

 resembling that 



Nasturtium 3 

 Barbarea 4 

 Sisymbrium 5 



SiNAPIS 6 



Brassica 



Lepidium 7 

 Capsella 8 



Se.hebieea 9 



Cakile 10 

 Rapistrum 11 

 Raphanus 12 



1. M.VTTHIOLA, R. Br. 



(N'amed after Matthioli, an Italian botanist of the 16tli 



century.) 



Sepals erect, lateral ones pouched at base; pod long, 

 linear, valves Inerved ; seeds numerous, compressed, 

 winged, in 1 row; cotyledons accumbent. White-tomentose 

 plants, with .stellate liaii's. 



Pod compressed; leaves entire M. incana 1 



Pod cylindrical, 2-horned ; leaves pinnatifid .1/. hironiis 2 



1. Matthiola incana, R. Br. Aufinniial Stock. 

 Biennial or perennial: .stem woody and bare at ba.se; leaves 

 oblong, tapering at base, entire; flowers large, purple : pods 

 erect. 



An escape from gardens on sandhills near Brighton. — 

 Aug. -Nov. — Mediterranean region and sea-coasts of western 

 Europe. 



2. M. bicornis, DC. Two-honutl Shnk. Annual or 

 biennial, with long taprt)ot ; lower leaves pinnatifid with 

 a long terminal lobe, the upper ones linear, entire or 

 toothed; flowers large, violet, opening and fragrant at 

 night : pod cylindrical, beaded, slender, spreading, termin- 

 ating in 2 horns. 



