428 



CRUCIFERAE (MUSTARD FAMILY) 



Annuals or biennials, with yellow flowers. Lower leaves mostly lyrate, 

 incised, or pinnatifid. (The Latin name of the Cabbage.) 



* Beak of the pod large, flat or conspicuously angled, usually containing one 

 seed in an indehiscent cell ; leaves not clasping at the base. 



1. B. ALBA (L.) Boiss. (WHITE M.) Pods bristly, ascending on spreading 

 pedicels, more than half their length occupied by the sword-shaped beak ; leaves 

 all pinnatifid ; seeds pale, (tiinapis L.) Cultivated, and 

 occasionally spontaneous. (Introd. from Eu.) 



2. B. ARVENSIS (L.) Ktze. (CHARLOCK.) Knotty pods 

 fully one third occupied by a stout 2-cdged beak; upper 

 leaves rhombic, scarcely petioled, merely toothed ; fruiting 

 pedicels short, thick; pods smooth or rarely bristly. 4 cm. 

 long. (B. Sinapistrum Boiss.; Sinapis 

 arvensis L.) Noxious weed in grain- 

 fields, etc. (Nat. from Eu.) FIG. 755. 



* * Beak smaller, conical, seedless ; leaves 

 not clasping. 



755. B. arvensis. 

 Stein-leaf and part of 

 fruiting raceme x %. 



756. B. juncea. 



3. B. JUNCEA (L.) Cosson. Nearly 

 glabrous, somewhat glaucous; upper 

 leaves oblong, subentire, attenuate at 

 the base ; the lower lyrate ; pedicels 

 slender, spreading ; pod at length 3.5 cm. long. Roadsides, 

 grain-fields, etc., recently introduced but already common. Stem-leaf and part of 

 (Nat. from Asia.) FIG. 756. frultln <> r raceme x % 



4. B. JAP6NICA Siebold. (CURLED M.) Leaves crisped and much cleft;. 

 otherwise similar to the last. Occasionally established after cultivation. 

 (Introd. from Asia.) 



5. B. NIGRA (L.) Koch. (BLACK M.) Hirsute with scattered hairs, green; 

 leaves slender-petioled, the lower with a very large terminal lobe and a few 



small lateral ones; pods short, 1.5-1.8 cm. long, 

 on short erect pedicels, oppressed ; seeds dark, very 

 pungent. Roadsides and waste 

 places, common. (Nat. from Eu.) 

 FIG. 757. 



* * * Leaves cordate- or auricu- 

 late-clasping at the base. 



6. B. CAMPESTRIS L. (RUTA- 

 BAGA.) Glaucous, hispidulous with 

 scattered hairs at least when 

 young ; leaves lyrately lobed ; 

 flowers rather large, pale yellow 

 (Fi<;. 758); also B. NX PUS L. 

 (RAPE), which is very similar but 

 entirely glabrous ; and B. R\PA 



L. (TURNIP), which is greener, and has smaller brighter yellow 

 flowers and a thickened root ; all tend to escape from or persist 

 after cultivation, and are often noxious weeds. (Introd. from Eu.) B. OLKKATKA 

 L. (CABBAGE), with broad fleshy glaucous leaves, is occasionally found in a 

 half -wild state. (Introd. from Eu.) 



16. DIPLOTAXIS DC. 



Seeds ovoid, in two rows in each cell ; other characters as in Brassica. 

 Leaves toothed or piimutitid ; flowers yellow. (Name from the Greek, alluding 

 to the biseriate seeds. ) 



1. D. MURA.LIS (L.) DC. Annual or biennial, smooth or sparingly hispid, 

 leafy only near the branching base; leaves oblong, toothed or somewhat pin- 



T:>7. B. nigra. 

 Leaves and part of fruiting raceme 



x%. 



758. B. campestris. 



Stem-leaf and part 



of fruiting raceme 



