326 RyDBERG: STUDIES ON THE ROCKY MOUNTAIN FLORA 
Carlton 6283; Fish Lake, August 2, 1909, Garrett 2578; Elk Moun- 
tains, August 8, 1911, Rydberg & Garrett 9552; Head of Dry Wash, 
August II, 1911, 9628; Mount Ellen, July 25, 1894, M. E. Jones 
56842; Logan Canyon, June 28, 1910, C. P. Smith 2226. 
Arabis MacDougalii sp. nov. 
Perennial; stem 4-6 dm. high, simple below, densely stellate- 
pubescent; basal leaves narrowly oblanceolate, 2-4 cm. long, 
entire or denticulate, densely stellate-pubescent; stem leaves 
linear or linear-lanceolate, sagittate at the base; sepals oblong, 
stellate-pubescent; petals white, oblanceolate, 5-6 mm. long; 
pedicels in fruit reflexed, 5-10 mm. long; pods finely stellate- 
pubescent, reflexed, 4-5 cm. long, 1.5 mm. wide; seeds in one row. 
This species is related to A. subpinnatifida but differs in its 
smaller white petals and its entire leaves. 
Montana: Old Sentinel, near’ Missoula, June 12, 1901, Mac- 
Dougal 191 (type, in herb. N. Y. Bot. Garden). 
Nevapa: King Canyon, Ormsby County, June 4, 1902, C. F. 
Baker 986 (referred here doubtfully). 
v Arabis brevisiliqua sp. nov. 
Biennial; stems 3-4 dm. high, sparingly stellate-pubescent 
below, otherwise glabrous; basal leaves narrowly oblanceolate, 
1-2 cm. long, finely stellate-pubescent; stem leaves linear, sagittate 
at the base, glabrous: sepals scarious-margined, 3 mm. oe 
glabrous or nearly so; petals purplish, about 6 mm. long; ge’ 
in fruit 3-5 mm. long, recurved pods 2-3 cm. long, 2 mm, wide, 
glabrous; seeds in two rows. 
This species resembles A. lignifera A. Nels., but the pod is see 
shorter, less than 3 cm. long, with the seeds in two rows, 
the sepals are glabrous instead of stellate-pubescent. “ 
Britis Cotumsia: Skagit Valley, July 6, 1905, J. M. rie 
70825 (type, in herb. N. Y. Bot. Garden); near internatlo 
boundary, between Kettle and Columbia rivers, July 16, 19° 
J. M. Macoun 63400. “a 
ALBERTA: Trail to Lake O’Hara, August 8, 1904, John aS 
64517 in part. 
Parrya platycarpa sp. nov. 
Parrya macrocarpa S. Wats. Bot. King Exp. 14. 1871. 
macrocarpa R. Br. 1821. 
Not P. 
