524 PLANT LIFE OF ALABAMA. 
Diplotaxis tenuifolia (L.) DC. Syst. 2:632. 1821. Narrow-LEaAr SAND MUSTARD. 
Sisymbrium tenuifolium L, Cent. P1],1:18. 1755. Amoen. Acad. 4: 279. 1788. 
Gray, Syn. Fl. N. A. 1, pt. 1:134. Britt. & Br. Ill, Fl. 2: 120. 
EUROPE. 
From the same region, and found in about the same situations as the above. 
ALABAMA: Less frequent than the last on ballast heaps at Mobile. Perennial. 
Type locality: ‘ Hab, in Gallia, Italia, Helvetia.” 
Herb. Mohr. 
IODANTHUS Torr. & Gray, Fl. N.A.1:72. 1838, 
(THELYPODIUM Wats. Index, 73. 1878.) 
A single species, Atlantic North America, 
Iodanthus pinnatifidus (Michx.) Steud. Nomene. ed. 2, 812. 1841. Vio_er Rocker. 
Hesperis pinnatifida Michx, F], Bor, Am. 2:31. 1803. 
Todanthus hesperidoides Torr, & Gray in Gray, Gen, Il. 1: 134, t. 44. 1848. 
Gray, Man. ed. 6, 72; Chap. Fl, 25, Gray, Syn. Fl. N. A.1, pt. 1:150. Engl. & 
Prantl, Nat. Pfl. 3, Abt. 2: 183. 
Alleghenian to Carolinian area, Western Pennsylvania, Ohio Valley, and Minne- 
sota, south to Texas and Arkansas. 
ALABAMA: Tennessee Valley. Rich woods, Lawrence County, Moulton. Lauder- 
dale County, Florence (M. C. Wilson). Flowers violet, April, May; fruit ripe in 
July. Not frequent. Perennial. 
Type locality: ‘‘ Hab. in humidis sylvarum Tennassée.” 
Herb, Geol, Surv, Herb. Mohr. 
RORIPA Scop. Fl. Carn. 520. 1760, 
(NASTURTIUM R. Br. in Ait. Hort. Kew, ed. 2,4:109, 1812.) 
Fifty species, temperate regions, Northern Hemisphere. North America, 13, 
Roripa nasturtium (L.) Rusby, Mem. Torr. Club, 3, pt.3:5. 1893, WaTrer Cress. 
Nasturtium oficinale R. Br. in Ait. Hort. Kew. ed. 2,4:110. 1812. 
Sisymbrium nasturtium L. Sp. Pl 2:657, 1753. 
Ell. Sk.2:145. Gray, Man. ed. 6,69. Chap. F1.25. Wats. Bot. Calif. 1:43. Coulter, 
Contr. Nat. Herb. 2:16. Gray, Syn. Fl. N. A. 1, pt. 1: 146. 
Evuropr, Asta, SourH AMERICA (introduced), 
Alleghenian to Louisianian area. Naturalized and profusely distributed from 
Nova Scotia and Ontario to the Gulf, west to Texas, Colorado, Utah, and California. 
ALABAMA: Sparingly over the State. Shallow brooks. Mobile County, Spring- 
hill, Jofferson County (1,4. Smith). Flowers white; April. Perennial. 
Kconomic uses: Tho fresh herb, ‘‘ water cress,” is used medicinally and as a salad, 
Type locality: ‘‘ Hob.in Kuropa et America septentrionali ad fontes.” 
Herb. Geol. Surv. Herb. Mohr. 
Roripa sylvestris (L.) Bess. Enum. 27. 1821. YELLOW CREss, 
Sisymbrium sylvestre L. Sp. Pl. 2: 675, 17538. 
Nasturtium sylvestre R. Br. in Ait. Hort. Kew. ed. 2,4:110. 1812. 
Gray, Man. ed. 6,69, Chap. Fl. ed, 3, 24. Gray, Syn. F1.N. A.1, pt. 1: 147. 
EuRorE, ASIA. 
Carolinian and Louisianian areas. Naturalized from Massachusetts to Virginia, 
Illinois, and Missouri. 
ALABAMA: Fully established in shallow marshes and muddy ditches. Mobile, 
Observed for the past fifteen years, constantly spreading. Flowers deep yellow; 
April to June, Frequent. Perennial. 
Type locality: ‘‘ Hab. in Helvetiae, Germaniae, Galliae ruderatis.” 
Herb. Geol. Surv. Herb. Mohr. 
Roripa sessiliflora (Nutt.) A. 8. Hitchcock, Spring Fl. Manhat. 18. 1894. 
MARLY FIELD CRESS. 
Nasturtium sessiliflorum Nutt. in Torr. & Gray, F1.1:73. 1838. (Gray, Gen. Tlust. 
1: 1382, t. 53.) 
Gray, Man. ed.6, 70. Chap. Fl, 24. Coulter, Contr. Nat. Herb. 2:17. Gray, Syn. FL. 
N.A.1, pt. 1: 149. 
Carolinian and Louisianian areas. Virginiaand Kentucky to Missouri, south from 
Tennessee to Florida and western Texas. 
