18 CRUCIFEIUE. [Barbaraa. 



neither nerved nor keeled. Cotyledons accumbent, (0=)« 

 Cal. patent. Br. — Name from Nasus tortus, a convulsed nose, 

 an effect supposed to be produced by the acrid and pungent 

 quality of this plant. Tetr adynamia. Siliquosa. 



1. N. officinale, Br. Water Cress. Leaves pinnate, ovate, 

 subcordate, sinuato-dentate. Br. in Hort. Kew. ed. 2. v. iv. p. 

 110. Hook. Br. Fl. \.p. 304. E. Fl. v. iii. p. 92.— Sisym- 

 brium Nasturtium, Linn. — E. Bot. t. 855. 



Brooks and rivulets, frequent. Fl. July. ©.—A well known 

 aquatic, and an excellent and wholesome salad. Lower-leaves of 

 5 — 7 distant leaflets, the terminal one the largest and roundest; 

 cauline-leaflets subovate ; all rather succulent, glabrous, more or less 

 curved, or toothed. Floioers white. Pods about an inch long, 

 patent. 



2. N. sylvestre, Br. Creeping Nasturtium.. Leaves pinnate; 

 leaflets lanceolate, cut, those on the uppermost leaves entire. 

 Br. in Hort. Kew. ed. 2. v. iv. p. 110. Br. Fl. I. p. 305. E. 

 Fl. v. iii. p. 193. — Sisymbrium sylvestre, Linn. — E. Bot. t. 1. 

 p. 2324. 



Water sides and waste places. Banks of Lough Erne ; Doctor 

 Scott. Killikeen, County of Cavan ; Rev. N. J. Halpin. Fl. July, 

 Aug. %. — Boots much creeping. Stem one foot high, angular, 

 branched. Flowers yellow. Petals much longer than the calyx. 

 Pods short, patent, or curved a little upwards. 



3. N. terrestre, Br. Marsh Nasturtium. Leaves lyrato-pin- 

 natifid unequally toothed, glabrous ; root simply fibrous ; petals 

 not longer than the calyx. Br. in Hort. Kew. ed. 2.v. iv. p. 1 10. 

 Br. Fl. 1. p. 305. E. Fl. v. iii. p. 193. — Sisymbrium terrestre, 

 Linn.—E. Bot. t. 1747. 



Watery places. Low wet grounds between Mark's Church and 

 Ringsend, and elsewhere near Dublin, and other places, plentiful. Fl. 

 June — Sept. ©. 



4. N. amphibium, Br. Amphibious Nasturtium. Leaves 

 oblong, pinnatifid or serrated ; root simply fibrous ; petals longer 

 than the calyx. Br. in Hort. Kew. ed. 2. v. iv. p. 100. Br. Fl. 

 1, p. 305. E. Fl. v. iii. p. 195. — Sisymbrium amphibium, Linn. 

 —E. Bot. t. 1840. 



Watery places, frequent. By the side of the pond opposite to the 

 Zoological Gardens, Phoenix Park. Banks of Lough Erne ; Dr. Scott. 

 Fl. June— Aug. %. — Two or three feet high, branched. If any 

 leaves grow under the water, they are deeply- pinnatifid, otherwise 

 deeply serrated. Pods short, small, roundish, generally abortive. 



4. Barbarea. Br. Winter Cress. 



Pod 4-angled, and sometimes two-edged. Cotyledons accum- 

 bent (0=). Seeds in a single row. Calyx erect. Glands 



