236 RypBERG: STUDIES ON THE Rocky MounTAIN FLORA 
conspicuously auricled at the base: racemes numerous : pedicels 
short, in fruit scarcely more than 4 mm. long, diverging or even 
reflexed: sepals bright orange, obtuse; petals light yellow, 
scarcely equalling the sepals and not quite 1 mm. long: fruit (im- 
mature) 5-6 mm. long, slightly thicker at the base, abruptly con- 
tracted into a minute style, not .5 mm. long. 
In general appearance, this species resembles most R. palustris, 
but it is more branched with divaricate branches, has much shorter 
pedicels, rather longer and more tapering pod and not half as long 
style. From &. odtusa, it differs in the shape of the leaves, which 
are less dissected, the shorter style and general habit. The type 
grew at an altitude of 3300 m. 
CoLorapo: Red Mountain, south of Ouray, 1901, Z. M. Un- 
derwood, 2994. 
vRoripa integra sp. nov. 
Biennial, glabrous: stems few, strict, branched above ; basal 
leaves not seen as they are fallen off in the type specimen ; stem- 
leaves spatulate or rhombic spatulate, 1-2 cm. long, not auricled 
at the base, entire or slightly sinuate : racemes slender, lax : petals 
1.5 mm. long, scarcely exceeding the sepals; pedicels 1-3 mm. 
long, ascending : pod about 8 mm. long, somewhat curved: style 
about 5 mm. long. 
The type specimen is labelled Nasturtium palustre var., but it 
is not closely related to this species. It is nearer R. obtusa, but 
differs in the entire leaves; the more tapering and more curved 
pod, the erect habit and the short style. It grows at an altitude 
of about 2700 m. 
Uran: Wasatch Mountains, 1869, S. Watson, 64, in part 
(type in herb. Columbia University). 
¢ Lesquerella arenosa (Richards). 
Vesicaria arenosa Richardson, Frankl. Journ. App. 743- 
Lesquerella Ludoviciana var. arenosa S. Wats. Proc. Am. Acad. 
23: 262. 
This is amply distinct from Z. Ludoviciana (DC.) S. Wats. OF 
L. argentea (Pursh) MacM., by the more slender ascending stems, 
the shorter leaves, the oblanceolate, instead of linear stem-leaves 
and the comparatively larger and often somewhat ellipsoid pod. 
The range given in the Synoptical Flora should be extended to 
the Black Hills of South Dakota and northeastern Wyoming. 
