STUDIES IN THE CRUCIFERZ.—IV. 313 
Crow's Nest Pass, Alberta, August, 1897, Mr. John Macoun, 
being n. 18,122 of the Canadian Geol. Surv. collection. Also 
in flower only (showing pale-yellow flowers, with glabrous 
calyx), by the same, from Elbow River, in the same region, 
n. 18,123; both distributed as “D. stenoloba," an Alaskan 
perennial to which such plants as these sustain no near 
affinity. 
DRABA DICTYOTA. Annual,a foot high, rather freely branch- 
ing from near the base, the branches ascending, lowest leaves 
oblong-lanceolate, an inch long or more, nearly or quite 
entire, pubescent on both faces with loose dendritic rather 
than stellate hairs, the cauline 5 or 6, lanceolate, serrate- 
toothed: leafy portion of stem villous with simple hairs and 
also minutely stellate, the rachis of the long loose raceme 
glabrous: flowers small, pale-yellow, the green sepals glab- 
rous; petals obcordate-notched: pods about 4 lines long, 
narrowly oblong, glabrous, notably reticulate-venlose, the 
stigma nearly sessile. 
At Calgary, Alberta, 7 June, 1897, Mr. John Macoun, n. 
18,132 of Canad. Surv. Species akin to D. nemorosa, 
but with a branching habit, elongated leaves, and pods 
marked by a prominent reticulation of long narrow meshes. 
DRABA oLIGANTHA. Perennial, slender, the subscapiform 
flowering stems 2 to 6 inches high: leaves mostly rosulate, 
1 inch long or less, spatulate-oblong, rather thin, 1-nerved, 
entire, loosely pubescent with subsessile cruciform hairs, the 
1 or 2 sessile cauline leaves oblong-lanceolate, occasionally 
toothed: flowers commonly 2 or3, rarely 5 or 6, sometimes 
1 only, white, the calyx glabrous, the rather long petals 
retuse or emarginate: pods } inch long, very narrow, taper- 
ing gradually from the middle and slighty falcate, glabrous, 
their spreading pedicels 3 inch long. 
