67 
AR’/ABIS. 
Leaves about the middle of the stem with _ little~ 
projecting ‘‘auricles” (or lobes) on each side a 
their base. 
Upper leaves without teeth on their margin, and quite~ 
free from hairs. j 
perfolia'ta. Zower Mustard. 
All the leaves hairy, often more or less toothed. 
Leaves on the stem nearly 2 inches long, with short, 
; downy hairs; pods over 3 inches, drooping | 
when ripe. Turrita. Zowercress. 
\Teaves on the stem small, rough with coarse hairs ;~ 
pods 1-2 inches, erect. 
hirsuta. 
Leaves not auricled at their base. 
Root-leaves entire or toothed, not deeply lobed. 
( Plant slender, without any rootstock; pods not. 
| f twice as long as their slender, spreading stalks. | 
L Thalia‘na. Zhalecress. | 
Rootstock woody; pods erect, 4-6 times as long - Fh 
their stalks ; (Pembrokeshire). Vi 
} 
cilia'ta.~ 
Leaves at the root mostly deeply lobed. 
Leaves rough with stiff hairs; petals narrow, scarcely 
spreading, cream-coloured ; (near Bristol). 
stric'ta. 
Leaves with few hairs; petals wide at their tips, 
spreading, white or purplish; (alpine). 
petre’a. 
Se eee, 
ARENA/RIA. 
Leaves not 4 times as long as they are wide. 
Leaves thick and fleshy ; sepals blunt, longer than the~ 
( very short flower-stalks ; (petals varying in size. 
L peploi'des.~ 
Leaves not thick and fleshy; sepals pointed, shorter- 
than the flower-stalks; petals shorter than the | > 
sepals. 
une mostly 3 inch long or more, the lower ones. CF 
[ stalked, all distinctly 3-nerved (or 5-nerved). / 
[ triner'vis.~ 
-Leaves scarcely } inch, not stalked, 1-nerved (rarely) = 
3-nerved). serpyllifo'lia. SEs 
Leaves very narrow, many times as long as wide. 
