MUSTARD FAMILY 345 



scarcely 2 mm. wide. B. americana Rydb. Wet places in the mountains: 

 Mont.— Colo.— Utah— Wash.— B.C. Plaiji^Mont. J^Jl. 



2. C. stricta (Andrz.) W. F. Wight. Biennial; stem erect, 3-6 dm. high, 

 glabrous; petals light yellow; pods about 2.5 cm. long, stout, erect and apprcsscd 

 agamst therachis. B. stricta Andrz, Waste places: Que,— Sask.— Wyo — Fla • 

 Wash.— Ida.— Calif.; nat. from Eurasia. Ap-Je. 



3. C. verna (Michx.) Heller. Biennial; stem branched, 3-6 dm. high; leaves 

 with rounded or elliptic divisions; petals yellow, about 5 mm. long; fruiting 

 pedicels ascending, stout, angled; pods 5-6 cm. long, straight or nearly so, asrend- 

 ing, sliarply angled. B. praecox (J. E. Smith) R. Br. Waste places: N.Y.— 

 1 la.— Colo.; Cahf.— Wash.; adv. from Eu. My-Je. 



28. RAPHANUS L. Radish. 



Leafy annuals or biennials. Flowers perfect, in racemes. Sepals erect, the 

 lateral ones somewhat saccate at the base. Petals large, pale yellow, white or 

 hght purple. Pod terete, tapering into a distinct beak, one-celled or trans- 

 \^^u^i divided by several false partitions, more or less moniliform. Seeds 

 globular, pendulous. Cotyledons conduplicate. Stamens unappendaged. 



1. R, sativus L. Annual or biennial; stem branched, 4-5 dm. high, gla- 

 brous or nearly so; lower leaves lyrate-pinnatifid with rounded, crenate divisions, 

 more or less hairy, the uppermost lanceolate; petals 15-20 mm. long, with long 

 claws, white and tinged with yellow; pod 4-5 cm. long; body 7-8 mm. thick, 

 gradually tapering into a long beak. Waste places: Que.— B^C— Calif.— Fla.; 

 W. Ind.; escaped from cultivation. Plain—Suhmont. F-N. 



29, SINAFIS L. Mustard, Charlock. 



^ Annual or biennial, caulescent herbs, more or less hirsute. Flowers perfect, 

 in racemes or panicles. Leaves alternate, runcinate-pinnatifid or lobed. Sepals 

 more or less spreading, equal or the outer shghtly saccate at the base. Petals 

 yellow, longer than the sepals, clawed. Filaments not appendaged. Pods 

 elongate, nearly terete, more or less constricted between the seeds, the upper 

 portion, containing one seed, produced into a broad and sword-shaped or more or 

 less 4-angled beak. Seeds in one row in each cell, globose, marginless and wing- 

 less. Cot3'ledons conduplicate. 



Beak sword-shaped, constituting more than half the length of the pod. 1, S. alba, 



«eak somewhat 4-angIed, but flattened and 2-edged, constitucing about one-third the 

 length of the pod. 2. S. artensis. 



• 1. S. alba L. Annual; stem 3-6 dm. high, more or less hispid; leaves more 

 or less hirsute, the lower pinnatifid, with rounded toothed divisions, the upper- 

 most often entire; petals yellow, about 1 cm. long; pedicels in fruit spreading; 

 pod densely hispid, about 3 cm. long. Waste places and fields: Me. — Fla.— 

 Cahf,— B.C.; nat. from Eu. Plain— SuhmonL Mr-Au. 



2. S. arvensis L, Annual; stem 3-6 dm. high, more or less hirsute, or gla- 

 brous above; lower leaves l>Tate-pinnatifid, with a rounded toothed terminal 

 lobe, usually hispid on the veins beneath; upper leaves oblong or lanceolate, 

 merely toothed; petals bright 3'ellow, 8 mm. long; pedicels ascending, about 5 

 mm. long; pods ascending, 3^ cm. long; beak about 5 mm. long. Brass^ica 

 arvensis (L.) B.S.P. B, Sinapistrum Bois. Fields and waste places: Me.— Fla. 

 CdHf. — Wash.; W. Ind.; nat. from Eu. Plain — Submont. My-S, 



30. ERUCA (Tourn.) Mill. Garden Rocket. 



Annual or biennial, branching herbs. Leaves pinnately lobed or toothed, 

 rjowers perfect, large, racemose. Petals yellowish or purplish, with brown or 

 Violet veins. Pod hnear, with a long sword-shaped beak; valves with a single 

 strong and several faint nerves; seeds in two rows. 



1- E. Eruca (L.) Britton. Annual; stem glabrous, 3-i dm. high; lower 

 leaves pinnatifid or lobed, the upper often merely dentate; petals strongly veined; 

 pod 1.5 cm. long or moie, erect on erect pedicels. E. sativa Lam. Waste places: 

 <^nt.— Pa.— Mo.— N.M.— Mont.; adv. from Eu. My-0. 



15* 



