Cardamine.'] 
CRUCIFERS. 
7 
white or purple. Distrib. Everywhere in temperate regions. 
Species 60. 
1. C. hirsuta, Linn. ; DC. Prod. i. 152. A small glabrous annual, 
with slender ccespitose stems. Leaves petioled, pinnate, with 1-3 
small roundish stalked entire or repand leaflets. Flowers minute, 
whitish, in lax terminal racemes ; pedicels ascending, longer than the 
calyx. Pod about | in. long, narrowed to the base, and a short beak. 
Seeds 6-8, with a space between them. C. borbonica, Bojer, Hort. Maur. 
11, non Pers. 
Mauritius, in cool elevated situations. Cosmopolitan in temperate regions. 
C. borbonica, Pers., is C. africana , Linn, a totally different plant, which is widely 
spread through Africa and Asia, reaching Bourbon, but not found in Mauritius. 
2. NASTURTIUM, R. Br. 
Sepals not saccate at the base. Petals clawed, exceeding the calyx. 
Pod sausage-shaped, rarely short, the valves rounded on the back. Seeds 
biserial, globose; radicle accumbent. — Annual or perennial herbs; leaves 
often pinnate ; flowers white or yellow or purplish. Distrib. Cosmo- 
politan ; species 20-30. 
1. N. barbaresefolium, Baker . A stemless glabrous annual. 
Leaves all radical, in a dense rosette, petioled, pinnate, with a large 
oblong obtuse cordate end, and 1-2-jugate small round adnate side 
lobes. Racemes very lax, \ ft. long; pedicels flexuose, f to \\ in. long. 
Petals purplish-white, twice the length of the oblong sepals. Pod sub- 
terete, 1 in. long; style short ; stigma capitate. Seeds very numerous, 
minute, globose. 
Mauritius, in cultivated ground at Pamplemousses, Bouton ! Moka, Ayres ! 
Near the common tropical JY. indicum , Linn., and Cape N. Jluviatile, E. Meyer. 
Endemic. 
* N. officinale , R. Br., the common European water-cress, a robust 
glabrous floating perennial, with pinnate leaves, many pairs of 
oblong leaflets, small white flowers in dense terminal racemes, 
and cylindrical pods in. long, is established in some of the streams 
in Mauritius and Rodriguez. It is said to have been introduced about 
1760, by Aublet, the author of the Flora of Guiana. Oresson de fon- 
taines. 
* Brassica Sinapistrum, Boiss. ( Sinapis arvensis , Linn), the 
common European wild mustard, a hispid annual, with dense yellow 
flowers, long torulose pods with a deciduous beak and conduplicate 
cotyledons, is a frequent weed in cultivated ground in Mauritius. 
Moutarde sauvage. 
* B. juncea, Hk. fil. and Thoms. FI. Ind. i. 157, {Sinapis juncea, 
Linn.), commonly cultivated through tropical Asia, distinguished by its 
