120 CRUCIFERAE. [Vor. II. 
1. Diplotaxis tenuifdlia (I,.) DC. Wall Rocket. (Fig. 1705.) 
Sisymbrium tenutfolium I,, Cent. Pl. 1:18. 1755. 
Diplotaxis tenutfolia DC. Syst. 2: 632. 1821. 
Perennial, glabrous or nearly so, somewhat 
glaucous, stem branched, bushy, leafy, 1°-4° 
high. Leaves pinnatifid, often nearly to the 
midrib, thin, the lower 3/-6’ long, the lobes 
distant or close together, mostly narrow; ra- 
cemes elongated in fruit, loose; flowers 8//— 
10’ broad; pods 17-14%’ long, about 114/’ 
wide, nearly erect; pedicels slender, 10’/—20/’ 
long in fruit. 
In waste places and ballast, Nova Scotia to New 
Jersey and Pennsylvania, chiefly about the cities. 
June-Aug. 
2. Diplotaxis muralis (L.) DC. 
Sand Rocket. (Fig. 1706.) 
Sisymbrium murale \,. Sp. Pl. 658. 1753. 
Diplotaxis muralis DC. Syst. 2: 634. 1821. 
Annual, branched from the base, sparingly 
hispid or glabrous, the slender branches 1°— 
2° high, leafy only below. Leaves oblanceo- 
late, sinuate-lobed or sometimes pinnatifid, 
2/-4/ long, narrowed at the base, mostly slen- 
der-petioled; fruiting racemes long, loose; 
flowers 6’’-8’’ broad; pod about 1’ long and 
1’’ wide, erect, flattish; fruiting pedicels 4//— 
8’ long. 
In waste places and ballast, range of the pre- 
ceding species, June-Aug. 
14. RAPHANUS L.. Sp. Pl. 669. 1753. 
Erect branching mainly biennial herbs, with lyrate leaves and showy flowers. Silique 
elongated-linear, coriaceous, fleshy or corky, constricted or continuous and spongy between 
the seeds, indehiscent. Styleslender. Seeds subglobose; cotyledons conduplicate. [Greek, 
quick-appearing, from its rapid germination. ] 
A genus of about 6 species, natives of Europe and temperate Asia. 
Flowers yellow, fading white; pod longitudinally grooved, 4-10-seeded. 1. R. Raphanistrum, 
Flowers pink or white; pod not longitudinally grooved, 2-3-seeded. 2. R. sativus. 
