432 PATAGONIAN EXPEDITIONS I BOTANY. 



remote, entire, acute, narrow-linear. Flowers in terminal racemes on the 

 branches, largish, with pedicels of their own length ; petals white, spat- 

 ulate, twice as long as the yellowish-green, glabrous obtuse sepals. 

 Siliques thickish, erect. 



Patagon., near Golfo de San Jorge, between San Julian and Rio Deseado, 

 and along Rio Chubut. ( " Formerly confounded by me with S. pinna- 

 tum." Speg.) 



8. BRASSICA Linn. Cabbage, Turnip. 



Erect, branching herbs with pinnatifid basal, and toothed or entire 

 cauline leaves ; and yellow, racemose flowers. Siliques elongated, terete 

 or 4-sided, usually tipped by an indehiscent, i -seeded beak; the valves 

 convex, i-3-nerved. Seeds i -seriate in the cells, marginless. Cotyle- 

 dons conduplicate. 



Species 50, Mediterr. Region, and Asia ; cultivated and run wild in 

 extratropical climates. 



i. B. CAMPESTRIS Linn. 



30-60 cm. tall, glabrous or nearly so. Lower leaves petioled, pinnati- 

 fid ; upper lanceolate to oblong, clasping by rounded auricles. Flowers 

 bright yellow, 9 mm. broad. Pedicels rather spreading. Silique 4 cm. 

 long, its beak 9 mm. long. Seeds subspherical. 



N. Patagon., as far S. as Rio Chubut. Produces tough and stringy 

 turnips, which trouble farmers; called "Napur." (J. Ball.) Doubtless 

 introduced. 



2. B. MAGELLANICA PerS. 



Leaves pinnatipartite, glabrous. Flowers corymbose. Petals white, 

 their limb obovate. Silique sessile, not beaked. 

 Magellan, Navarino I., Falklands. 



3. B. NAPUS L. Rape. 



Leaves glabrous, subglaucous ; the lower lyrate, toothed, cuneate ; the 

 upper cordate-lanceolate, entire, amplexicaul. Siliques spreading toru- 

 lose. Petals yellow, rather small. 



E. Fuegia (Dusen; " doubtless introduced "). 



4. B. NIGRA (L.) Koch. Sinapis n. (Linn.) Black Mustard. 

 Erect ; i m. tall. Lower leaves slender-petioled, deeply pinnatifid, with 

 large, terminal lobe, toothed all round. Upper leaves more sessile, not 



