Nasturtium.'] viii. crucifer^ (oliver). 59 



Upper Guinea. Senegambia, Heudelot ! Perrottet ! 

 laower Guinea. Angola, Loanda, Dr. Welwitsch ! 



Wr . brachsrpus, Webb, Frag. Fl. ^thiop. 13. A low glabrous herb ; lower leavea lyrate ; 

 upper pinnate ; segments crenate-dentate. Flowers minute ; petals shorter than the sepals! 

 Siliqua compressed, oblong, 5 or 6 times longer than the thickish spreading pedicel. Seeds 

 ovoid scaly-tuterculate, deep red. 



Nile Iiand. Sennar and Kordofan {Webb). 



I have not seen this plant, the description of which, in abstract above, was based on a 

 single specimen by Mr, Webb. 



3. BAKBAREA, Br. ; Benth. et Hook. f. Gen. PI. i. 68. 



Sepals equal, erect or nearly so. Petals clawed. Siliqua narrow-linear, 

 somewhat tetrngonous owing to the prominent nerve or keel of the valves • 

 septum membranous. Stigma entire or 2-lobed. Seeds round or oblong, 

 compressed, not margined, in one series. Radicle accumbent. — Erect, usually 

 branched, glabrous herbs, with a more or less angular stem. Leaves pinna- 

 tifid, usually lyrate. Flowers yellow. 



*1. B. vulgaris, JBr. ; DC. Syst. Veg. ii. 206. An erect, ratlier stiff, 

 perfectly glabrous and but slightly branched herb, often 2-3 ft. high. Leaves 

 lyrate-pinnatifid, or the radical leaves reduced to the terminal, Large, entire, 

 sinuate or toothed segment ; lateral segments of the cauline leaves often 

 narrow-linear. Flowers numerous, in erect terminal racemes. Siliquas erect 

 or spreading, rather crowded, L in. or more in length, rigid, tipped with 

 the persistent style |-2 lines long; pedicels about \ as long as the siliqua. 



Nile Iiand. Abyssinia, Sckimper ! Probably introduced. Cultivated according to 

 Richard, who refers his specimens to B. pracox^ a variety of ^. vulgaris, diflfering iu the 

 shorter style. In our specimen it is about 1 line long. 



A common species, almost throughout the north temperate zone, occurring also iu Aus- 

 tralia. 



4. ARABIS, Linn. ; Benth. et Hook. f. Gen. PI. i. 69. 



Sepals rather short, equal or the lateral sepals saccate at base. Petals 

 entire, usually clawed. Siliqua sessile, narrow-linear, elongate, compressed ; 

 the valves plane, keeled or with a midnerve ; septum membranous ; stigma 

 simple or 2-lobed. Seeds usually in one series, compressed, with or wiilj^ut 

 a narrow wing. Radicle accumbent. — Glabrous or pubescent herbs. Jtadical 

 leaves usually more or less spathulate ; cauline sessile. Flowers racemose, 

 white or coloured, ebracteate. 



A large genus, chiefly of the north temperate zone. 



1. A. alpina, Linn.; DC. Syst. Veg. ii. 216. A perennial, dilfuse or 

 loosely tufted herb, 6-18 in. high, hoary with a short stellate tomentum or 

 green and sparsely pubescent. Kadical or winter leaves oblanceolate, dentate, 

 sinuate-dentate or nearly entire ; cauline often sessile, more or less amplexi- 

 caul. Flowers in terminal, erect or ascending, leafless racemes, white, r.itiier 

 large. Lateral sepals distinctly saccate. Siliquas ascending or spread- 

 ing, longer than the spreading pedicels. — A. cuneifolia, Hochst. in PI. 



