Xatturtium.] viii. cruciferte (oliver). 59 



Upper Guinea. Senegambia, Heudelot ! Perrottet ! 

 Lower Guinea. Angola, Loan da, Br. Welwitsch ! 



W. brachypus, Webb, Frag. Fl. iEthiop. 13. A low glabrous herb j lower leaves lyrate ; 

 tipper pinnate ; segments crenate-dentate. Flowers minute ; petals shorter than the sepals, 

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

 OToid scaly-tuberculate, deep red. 



Nile Land. Sennar and Kordofan {Webb). 



. ■ WB n °t seen this plant, the description of which, in abstract above, was based on a 

 single specimen by Mr. Webb. 



3. BARBAREA, Br. ; Benth. et Hook. f. Gen. PL i. 68. 



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

 somewhat tetragonous 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 

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

 «fid, usually lyrate. Flowers yellow. 



*}■ B. vulgaris, Br. ; DC. Syst. Veg. ii. 206. An erect, rather 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 

 "arrow- linear. Flowers numerous, in erect terminal racemes. Siliquas erect 

 °, r s P re ading, rather crowded, L in. or more in length, rigid, tipped with 



e P ers istent style \-1 lines long ; pedicels about \ as long as the siliqua. 

 Ri^' 1 ! Land ' Abyssinia, Schimper ! Probably introduced. Cultivated according to 

 short t*} 10 refeiS ^ is s P ecimens t0 B - Precox, a variety of B. vulgaris, differing in the 



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



traSa. " s P ccies > almos t throughout the north temperate zone, occurring also m Aus- 



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



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

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

 sim l V6S plane ' keeled or with a ra idnerve » septum membranous ; stigma 

 ™ple or 2-lobed. Seeds usually in one series, compressed, with or without 

 lea7 r ° W Wing< ^drele accumbent.— Glabrous or pubescent herbs. Radical 

 y«» usually more or less spathulate ; cauline sessile. Flowers racemose, 

 *«te or coloured, ebracteate. 



ge 8 enus > chiefly of the north temperate zone. 



1 ' A * alpina, Linn.; DC. Syst. Veg. ii. 216. A perennial, diffuse or 



w»y tufted herb, 6-18 in. high, hoarv with a short stellate tomentum or 



sj n n and sparsely pubescent. Radical or winter leaves oblanceolate, dentate, 



canl T'i tate 0r nearl y entire ; caulme often sessile , raore or less . am P lexl " 



l a ' powers in terminal, erect or ascending, leafless racemes, white, rather 



in»i Uteral se P al s distinctly saccate. Siliquas ascending or spread- 



6 ' lon ger than the spreading pedicels.—^, cuneifolia, Hochst, in PI. 



