y : 1 
Cruciferaceae 179 
PP. Leaves pinnatifid, not awl-shaped; terrestrial; seeds many. 
HUTCHINSIA (p. 187) 
MM. _ Valves of the pod acute- or wing-keeled. 
Q. Pod orbicular or obovate; cells |—2-seeded; petals often none. 
LEPIDIUM (p. 181) 
QQ. Pod ovate or oblong; cells 2- to several-seeded; petals always pres- 
ent. THLASPI (p. 182) 
STANLEYA 
Biennial or perennial, stout. Leaves entire or few-toothed. Flowers white or green- 
ish or yellow (not ours), in elongated many-flowered racemes. Sepals long, spreading. 
Petals long, narrow, slender-clawed. Stigma sessile, entire. Pod terete or subterete, 
elongated, on a slender stipe; valves |-veined. Seeds oblong, in | row in each cell. 
(Honor of E. Stanley, ex-president of the Linnaean Society.) 
A. Flowers white or greenish. 
B. Stem angular; buds as much as 15 mm. long and scattered before opening; pedi- 
cels in fruit 6—8 mm. long. E. 
S. viridiflora Nutt. 
BB. Stem terete; buds 8—10 mm. long and densely massed before opening; pedicels 
in frutt 12—15 mm. long. E. 
S. confertiflora How. 
AA. Flowers yellow. E. rara Nels. 
THELYPODIUM PURPLE MUSTARD 
Annual or biennial, mostly coarse. Leaves entire or pinnatifid. Flowers white or 
purple or rarely yellow (not in ours), in long racemes. Sepals equal or the lateral pair 
saccate at base. Petals plane.. Stamens well exserted. Stigma usually small. Pod 
slender, elongated, terete or 4-angled, often torulose, with short thick stipe. Seeds in 1 
row, somewhat flat. (Gk. thelys—female, poys—foot or stalk; the pod is short-stalked. ) 
A. Stem-leaves cordate-clasping or auriculate at base, sessile. 
B. Pods 1.2—3.1 cm. long; petals 4—12 mm. long. 
C. Flowers in young clusters opening considerably below the bud-bearing apex of 
the flowering axis. 
D. Plant hispid near the base; stem-leaves 2.5 cm. or less long; buds and 
flowers ascending. E. 
T. howellii Wats. 
DD. Plant glabrous thruout; stem-leaves 2.5——7.5 cm. long; buds and flowers 
widely spreading. E. 
T. eucosmum Rob. 
CC. Flowers opening close to the summit of the cluster while it is still corymbose. 
E. Basal leaves spatulate; stem-leaves oblong-lanceolate to ovate-lanceolate, 
their auricles obtuse. E. 
T. torulosum Hel. 
EE. Basal leaves lanceolate; stem-leaves linear-oblong to linear-lanceolate, their 
auricles acute. FE T. flexuosum Rob. 
BB. Pods 5—7.5 cm. long; petals 14—17 mm. long. E. (7. nuttallii.) 
T. sagittatum Hel. 
AA.  Stem-leaves not cordate-clasping nor auriculate at base, either sessile by a narrow 
base or distinctly petioled. 
F. Annual; racemes loose; pods reflexed. W. E. 
T. lasiophyllum Gr. 

