[Vol. 8 
156 ANNALS OF THE MISSOURI BOTANICAL GARDEN 
soid, 6-7 mm. long, 4-5 mm. broad, sparsely stellate-pubescent ; 
styles 3-4 mm. long; septum nerved; ovules 3-4 in each cell; 
seeds not winged. 
Distribution: Uruguay. 
No specimens of this plant have been seen, but the figure in 
the *Flora Brasiliensis' is so detailed, little doubt remains that 
this species is properly placed under Lesquerella. In appearance 
it is not unlike L. Engelmannii but its affinity to this species is 
of course merely conjectural. 
11. L. arctica (Wormsk.) Wats. Proc. Am. Acad. 23: 254. 
1888; Wats. in Gray, Syn. Fl. N. Am. 1': 120. 1895; Britton 
& Brown, Ill. Fl. 2: 138. 1897, and ed. 2, 2: 156. 1913; Sim- 
mons, Rept. Second Norwegian Arctic Exp. in the Fram, No. 
2, 95. 1906. 
Alyssum arcticum Wormsk. ex Horne. Fl. Dan. 9: t. 1520. 
1814. 
A. ? arcticum DC. Syst. 2: 324. 1821. 
Vesicaria arctica Richards in Frankl. Narr. First Jour. App. 
743. 1823; Hook. Fl. Bor. Am. 1: 48. 1829; Torr. & Gray, 
Fl. N. Am. 1: 100. 1838; Gray, Bost. Jour. Nat. Hist. (Pl. 
Lindh.) 6: 149. 1850; Durand, Jour. Acad. Nat. Sci. Phila. 
3: 186. 1856; Busch, Zweite Deutsche Nordpolarfahrt 2, Abt. 
I:30. 1874; Macoun, Cat. Canadian Pl. 1:54. 1883; Meehan, 
Proc. Acad. Nat. Sci. Phila. 1893: 208. 1893. 
Perennial, silvery stellate throughout with a dense scurfy 
pubescence; stellae small, many-rayed, rays confluent at the 
base; stems lateral, decumbent or nearly erect, 1-2 dm. long, 
unbranched; terminal bud remaining undeveloped; radical 
leaves densely rosulate on the thick caudex, 1-5 em. long, thick, 
from spatulate to narrowly oblanceolate, entire, obtuse or acute, 
petiole broad; cauline leaves few, linear oblanceolate, entire, 
8-15 mm. long, tapering to a narrow base; flowers rather few; 
petals yellow, 5-6 mm. long, scarcely narrowed to a claw; fila- 
ments rather stout, linear; fruiting inflorescence open, showing 
a tendency to remain corymbose; pedicels stout, erect or ascend- 
ing, about 1.5 em. long; pods erect, glabrous, sessile, globose or 
slightly elongated, 5-6 mm. in diameter; styles 1-2 mm. long, 
stigmas enlarged; septum thin, often perforate, nerved, areolae 
