274 CRUCIFERAE 
The corollas are all regular. All have 4 petals, equal and simi- 
lar, forming a cruciform flower. The sepals are also 4, and equal. - 
The stamens are 6 in number and, unlike the corolla, are unequal, 
4 being longer than the remaining 2; in some species some of the 
stamens are suppressed. Pistil 1, of 2 united carpels. The fruit 
is almost always in a linear pod, a turn, or in short more or less 
triangular, orbicular or oblong pod, a turn. 
First Group 
Fruit pod pear-shaped, triangular or oblong, distinctly flattened con- 
trary to the partition. Flowers white. 
Fruit-pod longer than broad. 
Pod oval with a notch or with a slender style at the apex, or 
With DO UnT Whi ake eee aaa el, Fe ae Lepidium 
Pod pear-shaped or triangular; leaves clasping the stem by 
broad ear-like appendages. 
Leaves feather-formed (pinnate), with deep sinuses Capsella 
Leaves not feather-formed, sinuses shallow or none Thlaspi 
fod broader than long). . h\/4 620)... ee 6, Oe eromenee 
SEcOoND GROUP 
Fruit oval or globular, not flattened or only slightly so. 
Flowers white or purple. 
Fleshy plant growing in sand at sea side . . . . . Cakile 
Aquatie plant with awl-shaped leaves, all basal . . Subularia 
Plants not fleshy and leaves not awl-shaped nor all basal. 
Leaves mostly in a whorl about the base, plants gen- 
erally ‘less than 2 foot high) 98s) Draba 
Leaves not mostly in whorl] at base, plants 1 ft. high or 
13007 Ee Ci Me! Fic Cee meri, "SMe wel ( leyora dyer! 
Flowers yellow. 
Leaves clasping stem by a broad base. 
Pods marked by distinct reticulations . . . . Neslia 
Pods not reticulated . . . . . > +.» Camelia 
Leaves not clasping stem by a broad ce: 
Leaves small, spatula-formed, pod without a conspicu- 
OUS “style “ave Gr oem ict cee State Alyssum 
Leaves pinnate (2 aera eee 
Tuirp GROUP 
Fruit in linear pods (siliques, see page 38, Part I), generally in 
length more than 4 times the diameter of the flower. Exception, No. 
18, about twice the length of the diameter of the flower. 
Flowers yellow. 
Pods not jointed nor markedly constricted between the seeds. 
Leaves, at least the lower ones, feather-formed. 
