1921] 
PAYSON—MONOGRAPH OF THE GENUS LESQUERELLA 135 
from polygonal to tortuous; superimposed fibers wanting. Ov- 
ules 2-15 in each cell, funiculi attached to the septum for part 
of their lengths. Seeds more or less flattened, winged or im- 
marginate; cotyledons accumbent, radical sometimes slightly 
turned to one side. 
KEY TO THE SECTIONS 
Pods strongly flattened parallel to the septum, hirsute; stem-leaves 
i §1. Alysmus 
aoe ee a ee ERRAT E S e a 
eaves various 
Valves compressed at right angles to the septum, pubescent. . $2.Enantiocarpa 
Valves various but never compressed at right angles to the 
83. Eulesquerella 
6 «e99624b9 9944. © Oe 6 e«t 8s 49$ se 699 6*6 5594.99 P9 9 » WM 
Section 1. Axtysmus Wats. 
$1. Axysmus Wats. Proc. Am. Acad. 23: 250. 1888; Prantl 
in Engler & Prantl, Nat. Pflanzenfam. III. Abt. 2: 188. 1891; 
Wats. Syn. Fl. N. Am. 1’: 116. 1895. 
Annual, sparsely stellate; terminal bud developing into main 
stem; stems branching; radical leaves lyrately pinnatifid, cauline 
leaves auriculate at the base; filaments dilated at the base; pods 
strongly flattened parallel to the septum, orbicular, sessile, 
sparingly stellate and ciliate; ovules 3-5 in each cell, funiculi 
free or attached to septum only at the base; seeds flat, narrowly 
winged. Species 1. 
1. Lesquerella Lescurii (Gray) Wats. Proc. Am. Acad, 23: 
250. 1888; Wats. Syn. Fl. N. Am. 1': 116. 1895; Chapman, 
Fl. Southern U. S. 29. 1897; Britton & Brown, Ill. Fl. 2: 
154. 1913; Small, Fl. Southeastern U. S. 469. 1903, and ed. 2, 
1913. 
Vesicaria Lescurii Gray, Manual, ed. 2, 38. 1857; Torr. & 
Gray, Fl. N. Am. 1: 100. 1888. 
Alyssum Lescurii Gray, Manual, ed. 5, 72. 1867. 
Annual or biennial, sparsely stellate-pubescent, with few- 
rayed, rather loose stellae; stem repeatedly branching, par- 
ticularly near the base, 1-3 dm. long; branches slender, spread- 
ing or ascending; terminal bud developing into main stem; 
radical leaves withering early, 4-10 cm. long, lyrately pinnatifid, 
with rather few, remote segments, tapering to a slender petiole; 
cauline leaves thin, shallowly toothed, oblanceolate to ovate or 
narrower, 1-3 cm. long, auriculate at base; flowers yellow; 
