32 in. CEUCIJEBAE. \^Pachycladon. 



* B. alba, £oMs, Voy. Espagne ii. 39. Erect; lfc.-2ft. high. Leaves hispid, 

 with reflexed hairs, pinnate or lyrate-pinnatifid ; segments cut or lobed. Flowers 

 pale-yellow. Fruiting pedicels slender, spreading. Pods ■Jin.-2in. long, hispid, 

 knotted ; beak as long as the pod, 1-seeded ; valves strongly ribbed, often convex, 

 1-3-seeded. 



NORTH and SOUTH Islands : Naturalised in cultivated land, but local. Auckland, Canter- 

 bury, &c. White mustard. Nov. to Jan. Europe, North Africa, North and West Asia, &c. 



* DIPLOTAXIS, DC. 



Sepals spreading, equal. Pod elongated, compressed ; stigma entire. Seeds 

 2-seriate, compressed. Cotyledons incumbent. Herbs with sinuate or pinnatifid 

 leaves and yellow flowers. 



* D. muralis, DC, Syst. Veg. ii. 634. Annual, hispid or glabrate. Stems 

 simple, slender, leafy below. Leaves usually petioled, ovate-lanceolate or oblong, 

 entire, sinuate-dentate or pinnatifid. Flowers in terminal racemes. Pods lin.-2in. 

 long, compressed, narrowed above ; style long, straight ; valves flat, nerves obscure. 



Var. muralis, proper. Leaves deeply pinnatifid ; stem-leaves few, slender. Petals twice or 

 thrice as long as the sepals. Styles scarcely narrowed below. 



Var. viminea. Leaves nearly entire. Scapes slender, leafless or nearly so. Petals twice the 

 length of the sepals. Style narrowed belov?. 



NORTH Island : Var. muralis : naturalised on waste laud, Napier. Var. viminea : on sand- 

 hills near Nev? Plymouth and Porirua Harbour. Wall-mustard. Deo. to Feb. West and South 

 Europe. 



* ERUCA, Tourn. 



Sepals erect, lateral saccate at base. Petals clawed. Pod oblong, nearly 

 terete, turgid, with a long seedless beak ; valves 3-nerved. Stigma obscurely 2-lobed. 

 Seeds 2-seriate. Cotyledon incumbent. Annual or biennial branching herbs with 

 pinnatifid leaves. 



* E. sativa, Lam., FL. Fr. ii. 496. Stem branching, glabrate or hairy. Leaves 

 lyrate-pinnatipartite ; segments toothed or lobed. Sepals fugacious. Petals strongly 

 veined. 



Naturalised on KAIKOURAS Island, Port Fitzroy. Nov., Deo. South Europe. 



4. PACHYCLADON, Hook. f. 



Sepals 5, equal. Stamens 6. Pods laterally compressed, elliptic ; valves 

 boat-shaped ; septum incomplete ; style short, straight. Stigma 2-lobed. Seeds 

 3—5 in each cell ; funicle short. Cotyledons incumbent. A densely-tufted 

 herb, with stout taproots and radical rosulate leaves. 



Etym. Prom the Greek, in reference to the stout fleshy branches of the rootstook. 



A monotypio genus restricted to the extreme southern parts of the colony. 



1. P. Novae-Zelandiae, Hook, f., Handbk. 724. Root long, stout, 

 fleshy, branching into several stems above, each iin.-fin. in diameter, clothed 

 with remains of old leaves below, and crowned with a dense bead of small 

 imbricating horizontal leaves clothed with 2-fid or stellate hairs. Leaves iin.— lin. 

 long, blade oblong, narrowed into a short flat petiole, pinnatifidly lobed ; cauline 

 with longer petioles digitately lobed or entire, linear. Scapes numerous, 

 springing from below the leaves and exceeding them, erect or spreadino- 

 2-5-flowered. Petals linear-obovate or spathnlate, twice as long as the sepals. 



