CRUCIFERAE. 



VOL. II. 



2. Sinapis arvensis L. Charlock. Wild 

 Mustard. Fig. 2103. 



Sinapis arvensis L. Sp. PI. 668. 1753. 



Brassica Sinapistrum Boiss. Voy. Espagne 2 : 39. 

 1839-45- 



Brassica arvensis B.S.P. Prel. Cat. N. Y. 1888. 



Erect, annual, i-2 high, hispid with scat- 

 tered stiff hairs, or glabrate, branching above. 

 Leaves variously irregularly toothed or lobed; 

 flowers 6"-8" broad ; pedicels stout, 2"-$" long 

 in fruit; pods glabrous or slightly bristly, 

 spreading or ascending, somewhat constricted 

 between the seeds, 6"-8" long, i" wide, tipped 

 with a flattened elongated-conic often i-seeded 

 beak 5 "-6" long, the valves strongly nerved. 



In fields and waste places, frequent. Adventive 

 from Europe and widely distributed as a weed. 

 Corn-mustard, chadlock, corn- or field-kale. Ked- 

 lock. Kerlock or curlock. Bastard-rocket. Runch-, 

 crowd- or kraut-weed. Yellow-flower. Water-cress. 

 May-Nov. 



40. ERUCA [Tourn.] Mill. Card. Diet. Abr. ed. 4. 1754. 



Annual or biennial branching herbs, with pinnately lobed or dentate leaves, and rather 

 large racemose flowers, the petals yellowish to purplish with brown or violet veins. Style 

 elongated. Siliques linear-oblong, dehiscent, long-beaked, the 3-nerved valves concave. 

 Seeds in 2 rows on each cell. Cotyledons conduplicate. [Latin name for some crucifer.] 



Ten species, or fewer, natives of Europe and 

 western Asia, the following typical. 



i. Eruca Eruca (L.) Britton. Garden 

 Rocket. Fig. 2104. 



Brassica Eruca L. Sp. Pi. 667. 1753. 



Eruca sativa Mill. Card. Diet. Ed. 8, No. i. 1768. 



Annual, somewhat succulent, glabrous, i- 

 il high, commonly much branched. Basal 

 and lower leaves pinnately lobed or pinnatifid, 

 3'-6' long; upper leaves smaller, lobed, dentate 

 or denticulate; flowers \'-\' wide, variously 

 colored, the petals strongly veined ; raceme 

 much elongated in front, the short pedicels and 

 the pods erect-appressed ; pods long or more, 

 tipped by a stout flat beak. 



Waste grounds, Ontario to Pennsylvania and 

 Missouri. Adventive from Europe. Also intro- 

 duced into Mexico. May-Oct. 



41. BRASSICA [Tourn.] L. Sp. 

 PI. 666. 1753. 



Erect branching annual, biennial or perennial herbs, with pinnatifid basal leaves, those 

 of the stem dentate or often nearly entire, and showy yellow flowers in elongated racemes. 

 Siliques elongated, sessile, terete or 4-sided, tipped with an indehiscent conic beak. Valves 

 convex, i-3-nerved. Stigma truncate or 2-lobed. Seeds in I row in each cell, globose to 

 oblong, marginless; cotyledons conduplicate. [Latin name of the Cabbage.] 



A genus of about 80 species, natives of Europe, Asia and northern Africa. Type species: 

 Brassica oleracea L. 



None of the leaves clasping the stem, the upper sessile. 



Pods slender, J^'-i' long, appressed ; pedicels 2" long. i. B.nigra. 



Pods rather slender, i'-2 f long, erect, on slender pedicels 3" -5" long. 2. B.juncea. 



Upper leaves clasping by an auricled base. 3. B. campestris. 



