524 PLANT LIFE OF ALABAMA. 
Diplotaxis tenuifolia (L.) DC. Syst. 2:632. 1821. NarRow-LEar SAND MUSTARD. 
Sisymbrium tenuifolium L. Cent. P1.1:18. 1755. Amoen. Acad. 4:279. 1788. 
Gray, Syn. Fl. N. A. 1, pt. 1:184, Britt. & Br. Ill. Fl. 2: 120. 
EUROPE. 
From the same region, and found in about the same situations as the above. 
AvaBaMA: 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. Nomence. ed. 2, 812. 1841. ViotmT Rocker. 
Hesperis pinnatifida Michx. Fl. Bor. Am. 2:31. 1803. 
Acting ees ae = ard in Gray, Gen. Ill. 1: 134, 4.54. 1848. 
ray, Man. ed. G, 72; ap. Fl. 25. Gray, Syn. Fl. N. A.1, pt. 1:150. Engl. 
Prantl, Nat. PAl. 3, Abt. 2:183 side se oii 
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. 1898. Water Cress. 
Nasturtium officinale R. Br. in Ait. Hort. Kew. ed. 2,4:110. 1812. 
Sisymbrium nasturtium L. Sp. Pl. 2:657. 17538. 
EL. Sk. 2:145. Gray, Man. ed. 6,69. Chap. Fl. 25. Wats. Bot. Calif.1:43, Coulter, 
Contr. Nat. Herb.2:16. Gray, Syn. Fl. N. A. 1, pt. 1: 146. 
Evurorg, Asta, SouUTH 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 (£. A. Smith). Flowers white; April. Perennial. 
Economic uses: Tho fresh herb, ‘‘ water cress,” is used medicinally and as a salad. 
Type locality: ‘‘Hab.in Europa 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, 1753. 
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. FIN. A.1, pt. 1: 147. 
EvuROPE, 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. S. Hitchcock, Spring Fl. Manhat. 18. 1894. 
Earty FIELD CRrEss. 
Nasturtium sessiliforum Nutt. in Torr. & Gray, Fl.1:73. 1838. (Gray, Gen. Illust. 
1: 132, 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. Virginia and Kentucky to Missouri, south from 
Tennessee to Florida and western Texas. 
