66 Rhodora [APRIL 
D. Arabis, Pers., Syn. ii. 190 (1807). D. glabella, Pursh, Fl. 434 
(1814) fide Torr. & Gray, Fl. N. Am. i. 668, and Watson, Bib. Ind. 
58.(1878). D. incana, var. arabisans, Watson, Proc. Am. Acad. xxiii. 
260 (1888), in Gray, Man. ed. 6, 67 (1890), and in Gray, Syn. Fl. i. 
part 1, 111 (1895); Britton & Brown, Ill. Fl. ii. 142 (1897). D. 
incana, var. glabriuscula, Gray, Ann. Lyc. Nat. Hist; N. Y. iii. 223 
(1835).— An American species described by Michaux from * rupibus 
ripariis ad lacum Champlain et in Nova Anglia." — NEWFOUNDLAND, 
sea cliffs, Bay of Islands, June 24, 1895 (4. C. Waghorne): QUE- 
BEC, calcareous cliffs, Mt. Ste. Anne, Percé, Aug. 18, 1904 (Collins, 
Fernald & Pease); rocky bank of the Grand River, Gaspé Co., July, 
1903 (G. H. Richards), July 2, 1904 (Fernald) ; trap cliffs at 1800- 
1900 feet, Tracadigash Mt., Carleton, July 24, 1904 (Collins, Fernald 
& Pease); limestone-conglomerate cliffs, Bic, Rimouski Co., July 
16-18, 1904 (Collins & Fernald); MAINE, Mt. Kineo, Sept., 1887 
(G. G. Kennedy); Day Mt., Franklin Co., July 24, 1903 (C. Æ. 
Knowlton), Aug. 31, 1904 (C. H. Knowlton & E. B. Chamber lain) : 
Vermont, Lake Champlain (Michaux in Herb. Mus. d'Hist. Nat., 
Paris); rocky shores and cliffs, Gardner Island, Lake Champlain 
(Faxon, et al.) ; cliffs of Willoughby Mt. (Wm. Boott, et al.) ; Smug- 
gler’s Notch, Mt. Mansfield (Faxon, et al.); Snake Mt., Weybridge, 
June 30, 1892 (W. W. Eggleston) Mt. Eolus, Dorset, September, 1901 
(Mrs. E. H. Terry): New York, rocky banks of lakes in St. Law- 
rence and Jefferson Counties (4. Gray) ; Sacketts Harbor (W. A. 
Wood); Cayuga Lake, June 16, 1885 (W. R. Dudley) ; near Akron, 
Erie County, 1864 (G. W. Clinton) : ONTARIO, from Sault Ste. Marie 
to Michipicoten Bay (C. G. Loring). 
Var. orthocarpa, n. var. (Figs. 10, 11.) Generally lower, 1-3 dm. 
high: siliques rarely twisted, 5-10 mm. long, 2-4 mm. wide: seeds 
o.8-1.25 mm. long.— LABRADOR, without station (Martin); Hopedale 
(J. Steetz); base of cliff, Dead Islands, Aug. 20, 1882 (J. A. Allen, 
no. 25): QUEBEC, on shingle, West Point, Anticosti, Sept. 7, 1883 
(J. Macoun, no. 20); cold cliffs, Grand Coupe, Percé, Aug. 19, 1904; 
cliffs of Gaspé Bay, Douglastown, Aug? 22, 1904; shaded calcareous 
cliffs, Little River, Gaspé County, Aug. 16, 1904; trap cliffs at 1800— 
1900 ft., Tracadigash Mt., Carleton, July 24, 1904 (Collins, Fernald 
& Pease); limestone-conglomerate cliffs, Bic, Rimouski County 
(TYPE) July 15-18, 1904 (Collins & Fernald): New BRUNSWICK, 
Restigouche River, July 28, 1888 (J. Brittain); rocks, Kennebec- 
