56 CLASS XIV. ORDER 11. 



CLASS XIV. TETRADYNAMIA. 



ORDER I. SILICDLOSA. 



Thlas"pi. Calyx spreading, equal at the base; filaments distinct, withom 

 teeth ; silicle compressed, emarginate, obcordate, many-seeded; valves resem- 

 ole two boats with the keels outward, (shepherd's purse.) 



Lepid"ium. Calyx spreading ; corolla regular ; silicle emarginate, cordate or 

 oval ; cells 1-seeded ; valves carinate, dehiscent ; partition contrary ; cotyle- 

 dons incumbent, (pepper-grass.) 



Cochlea'ria. Silicle thick, rugose, many-seeded, 2-valved ; valves gibbous, 

 obtuse ; partition nearly parallel to the valves, (horse-radish, water-radish.) 



Caki'le. [Bunias.] Panicle compressed, of 2 single-seeded joints; the upper 

 joint with an erect single seed, inferior with a pendulous seed, (sea-rocket.) 



Dra'ba. Silicle entire, oval or oblong; valves flat or convex; cells many- 

 seeded ; seeds not margined ; filaments without teeth ; style ; cotyledons accum- 

 bent. (whitloe-grass.) 



Alys"sum. Calyx equal at the base; petals entire; stamens mostly toothed; 

 silicle orbicular, or elliptical ; valves flat, or convex in the centre; seeds 2 to 4 

 in each cell, compressed, sometimes merabranously winged ; cotyledons accum- 

 bent. (gold-of-pleasure.) 



Cameli'na. Silicle subovate, many-seeded ; valves thick; cotyledons incum- 

 bent, 



Subula'ria. Silicle entire, ovate, concave, (convex without;) stigma sub-ses- 

 sile ; seed linear, 2-plaited ; cotyledons incumbent. 



Cram^bk. Silicle globose, stalked, coriaceous, 1-celled, v/ithout valves, decid- 

 uous ; seed solitary, (sea-kale.) Ex. 



Luna'ria. Silicle entire, oval, flat compressed, pedicelled; valves equalling 

 the partition, parallel, flat ; calyx consists of coloured, sack-like leafets. (hon- 

 esty, or satin-flower.) Ex. 



Isa'tis. Silicle compressed, oblong ligulate, without valves, 1-seeded; parti- 

 tion like lattice-work, (woad.) Ex. 



Ibe'ris. Corolla irregular, the two outer petals longest ; silicle many-seeded, 

 emarginate. (candy-tuft.) Ex. 



Turri'tis. Calyx converging, erect; silique very long, striate, 2-euged; 

 valves keeled or nerved ; seeds arranged in a double series ; cotyledons accum- 

 bent. (tower mustard.) 



ORDER II. SILiaUOSA. 



Denta'ria. Silique lanceolate ; valves flat, nerveless, often opening elastical- 

 ly ; receptacles not winged ; funicle dilated ; seeds in a single series, ovate, not 

 margined; cotyledons accumbent. (tooth-root.) 



Cardam"ine. Calyx leaves spreading but little ; stigma entire ; a single gland 

 between each of the short stamens and the calyx ; silique with truncate mar- 

 gins, linear, long, bursting elastically with revolute valves, narrower, but equal- 

 ling the length of the partitions; seed with a slender fnnicle, not margined.* 

 (American water-cress.) 



Ar"abis. Glands 4, one within each leafet of the erect calyx, of the size of 

 the reflexed scale ; silique compressed, tornlose, sub-divaricate ; valves flat, 1 

 nerved ; seeds arranged in a single series ; cotyledons accumbent. (wall-cress.) 



Cheiran'^thus. Calyx closed, two of the leafets gibbous at the base ; petals 

 dilated ; )ilique, when young, with a glandular tooth each side ; stigma 2-lobed; 

 SfcJ flat, sometimes margined, (stock-july flower, wall-flower.) 



Sina'pis. Calyx spreading ; corolla with straight claws; glands between the 

 short stamens and the pistil, and between the long stamens and the calyx ; par- 

 tition extending beyond the valves of the silique, ensiform ; seeds in a single 

 series, (mustard.) 



Rapha'nus. Calyx closed, setose ; silique torose, terete, not opening by valves. 

 1 or 2-celled; glands between the short stamens and pistil, and between the long 

 stamens and the calyx, (radish.) 



Bras"sica. Calyx erect, converging ; partition extending beyond the valves 

 of the silique; seed globose; glands between the short stamens and pistil, and 

 between the long stamens and calyx, (cabbage, turnip.) Ex. 



Barbare'a. Silique 4-edged; cotyledons accumbent; seeds in a single row; 

 calyx equal at the base, erect; shorter filaments with intermediate glands; 

 cotyledons accumbent. (water-radish.) 



