1911) Harger,— A new Arabis 39 
vel lyratis, petiolatis, 2-5 cm. longis, caulinis inferioribus lyratis, 
mediis dentatis, superioribus minoribus integris, caulinis omnibus 
sessilibus non amplexicaulibus; floribus racemosis; pedicellis plerum- 
que erectis; petalis albis, 6-8 mm. longis, calycem superantibus; 
sepalis linearibus vel oblongis, obtusis, 4-5 mm. longis; siliquis 
junioribus erectis flores superantibus, maturis falcato-recurvatis, 
6-9 cm. longis, circa 1.5 mm. latis; seminibus marginatis, quadratis, 
1.5-1.8 mm. longis, cirea 1 mm. latis. 
Plant 2-6 dm. tall, simple or somewhat branched, leafy, green and 
glabrous; radical leaves lanceolate-spatulate, dentate or lyrate-pinna- 
tifid, petioled, 2-5 cm. long, lower cauline leaves lyrate-pinnatifid, 
those on the middle of the stem dentate, the upper smaller and entire, 
all the cauline leaves sessile but not clasping; flowers racemed; 
pedicels nearly erect; petals white, 6-8 mm. long, exceeding the calyx; 
sepals linear or oblong, obtuse, 4-5 mm. long; young pods erect, over- 
topping the flowers, faleate-recurved when mature, 6-9 cm. long, 
about 1.5 mm. wide; seeds quadrate, margined, 1.5-1.8 mm. long, 
about 1 mm. wide. 
MAINE: South Berwick, June 13 € 14, 1896, J. C. Parlin and 
M. L. Fernald; Berwick, July 21, 1898, J.C. Parlin. MASSACHUSETTS: 
wet cliff at Cascade, Melrose, June 5 & 11, W. P. Rich; Barry's 
Woods, Jamaica Plain, June, 1879, C. E. Faxon; Medford, July 
8, 1885, C. W. Swan; Medford, May 31, 1896, F. S. Collins; Cascade, 
Middlesex Fells, June 7, 1900, J. R. Churchill; ledges, base of Bear- 
berry Hill, West Roxbury, July 12, 1902, F. G. Floyd. (CONNECTICUT: 
dry soil on trap ledge, Southbury, May 16, June 12 and July 25, 
1909, E. B. Harger, No. 5322 (type-specimen in Gray Herbarium); 
Bolton, 1907, C. A. Weatherby; Talcott Mt., West Hartford, 1896, 
H. S. Clark; and same locality 1898, A. W. Driggs; Wethersfield, 
C. Wright; trap cliff by Farmington River, East Granby, July 5, 1909, 
E. B. Harger; Mt. Carmel, Hamden, 1908, A. E. Blewitt. 
"Thanks are due Prof. M. L. Fernald for his assistance in procuring 
information regarding type-specimens and in other ways and to Mr. 
C. A. Weatherby for help with bibliographical work. 
OXFORD, CONNECTICUT. 
