22 -CRUCIFER^:. [('HKIUAXTIIUS. 



lateral saccate at the base. Petals with long claws. Pod elongate, com- 

 pressed or 4-aiigled ; valves 1 -nerved, flat or convex; stigma capital r <>r 

 with 2 spreading lobes. Seeds 1 -seriate, compressed, cotyledons accumhcut. 

 DISTRIB. N. temp, and cold regions ; species 12. ETYM. doubtful. 



C. CHEI'RI, L, ; leaves lanceolate acute entire. 

 Old walls; naturalized; an alien, Watson; fl. May-June. Perennial. 



shrubby below, branched, angled. Leaves 2-3 in. Raceme usually short. 



Flowers about 1 in. diam. fragrant, orange-yellow (in cultivation red, purple 



or brown). Pod 1-2^ in., 4-angled; stigma almost sessile; seed shortly 



winged above. DISTRIB. Central and N. Europe. 

 2. NASTUR'TIUM, Br. 



Branched, terrestrial or aquatic glabrous herbs ; hairs if present usually 

 simple. Leaves entire lobed or cut. Flowers small, usually yellow, some- 

 times bracteate. Sepah short, equal, spreading. Petals slightly clawed, 

 or 0. Stamens 1-6. Pod short or long, often curved, terete, pedicels 

 patent and curved, valves not rigid, convex, obscurely 1 -nerved ; style 

 short or long, stigma simple or 2-lobed. Seeds 2-seriate, small, turgid ; 

 cotyledons accumbent. DISTRIB. N. temp, and warmer regions; species 

 about 20. ETYM. doubtful. United with Cochlcaria by C. Armorada 

 (Horse-radish) and others. 



1. N. officina'le, Br. ; aquatic, leaves pinnate, leaflets subcordate si- 

 nuate-toothed, petals white twice as long as the sepals, pod linear. Wt< /- 

 cress. 



Watercourses, ascending above 1,000 feet in the N. of England ; fl. May-Oct. 

 Perennial, glabrous, green or olive-brown. Stem 2-4 ft., rooting, often 

 floating, fistular. Leaflets 3-6 pair. Flowers %-\ in. diam. Jin,;,,,,* 

 short. Hvpoffynotu fflandt 4. Pods ^-1 in., deflexed or horizontal, longer 

 than their pedicels ; valves beaded ; seeds suborbicular, compressed. 

 DISTRIB. Europe. W. Asia, N. Africa ; introd. in N. America and the 

 colonies, and choking some rivers of N. Zealand, where the stem grows as 

 thick as the wrist. 



VAU. 1, officina'le proper; decumbent, terminal leaflet broadest and largest. 

 VAR. 2, siifo'lium, Reich, (sp.); erect, tall, terminal leaflet oblong, all marly 

 equal. 



2. N. sylves'tre, Br. ; rootstock creeping, leaves deeply pinnatilid, 

 leaflets many, lanceolate more or less cut nearly equal, petals yellow twice 

 as long as the sepals, pod linear, seeds hardly 2-seiiate. 



Moist waste places from the Forth and Dumfries southwards, rare in the north ; 



S. of Ireland, rare ; fl. June- August. Stem angular, flexuous. Leaves very 



variable. Racemes short; flowers \ in. diam. Hypogynous glands t\ 



Pod ^-if in., curved, pedicel very slender longer or shorter than the pod ; 



seeds minute. DISTRIB. Europe, N. Africa, temp, and subtrop. Asia ; introd. 



in America. 



8. N. palus'tre, DC. ; leaves lyrate pinnatifid, segments few broad 

 unequally cut, terminal of the lower leaves very large, petals yellow 

 equalling the sepals or shorter, pod oblong turgid. N. terredtre, Sm. 

 Damp places from Argyle and Forfar southwards ; fl. June-Oct. Knot fibrous. 



&tem 1-2 ft., erect or inclined. Ltacts pinnate or pinnatifid, terminal leaflet 



