New or NorEewoRTHY Species.— XXII. 
ARABIS DREPANOLOBA. Perennial, the several stout de- 
cumbent stems 8 to 12 inches high; herbage seemingly gla- 
brous and glaucous, but the small oblanceolate lowest leaves 
sparsely stellate hairy ; the oblong sessile auriculate cauline 
ones like all the remaining parts of the plant glabrous: 
corollas red, inch long or more: fruiting raceme 2 to 5 
inches long, the broad spreading and slightly falcate-re- 
curved pods 2 inches long including the short pedicel, about, 
li lines wide, abruptly acutish, the stigma sessile; valves 
with a manifest nerve at base only ; seeds in two rows under 
each valve, flat, obovoid, narrowly winged. 
Collected in the National Park, near Banff, Alberta, about 
Devil’s Head Lake, Aug., 1891, by Mr. Macoun, and dis- 
tributed for Arabis Lemmoni, to which it is, indeed, related, 
yet easily distinguishable by its larger dimensions, much 
less pubescent lower leaves, and especially by its pods, which 
are twice as broad, and with two rows of seeds. 
DRABA PRÆALTA. Annual, very erect and strict, mostly 
quite simple, 10 to 15 inches high, subcinereous throughout, 
even to the pods, with short stellate hairs: rosulate basal 
leaves oblong-lanceolate, 4 to ? inch long, entire, or with two 
or three pairs of sharp teeth, the two or three cauline similar: 
flowers white: the loose fruiting raceme often 5 or 6 inches 
long, the almost lanceolate pods 4 inch long or more, ereci 
on ascending pedicels nearly as long, acute, rather turgid, 
not contorted, a channel-like depression marking the line of 
the midvein from its base to near the middle. 
Collected near Banff, Alberta, July, 1891, by Mr. Macoun. 
This is a plant which, by its annual root and large size, 
would be taken for a relative of D. nemorosa, but for its very 
