ORDERS | a6 
CRUCIFERA. 
W ALLFLOWER. 
A herb, stem inclined to be woody at its base. 
Leaves: alternate, sessile, exstipulate, snp lanceolate, 
margin entire, apex acute. 
Inflorescence : a raceme. 
Flowers : regular and hypogynous 
Culyaz (sepals): 2+ 2, free, inferior ; 
the lateral sepals bulge out owing to 
the nectaries on the short stamens. 
Corolla (petals): 4, free, hypogynous, 
cruciform. | 
Anidrecium (stamens): 2+ 2%, free, 
hypogynous ; four long, two short ee a eae 
stamens. .Nectaries at base.of shorb’ 44.4 oe WalLerowEH, 
stamens. | 
Gynecvum (carpels) : 2, joined, superior, stigma bifid; ue 
much reduced; placentation parietal. 
Fruit, a siliqua. (See Fig. 72.) 
The number of floral leaves in each whorl may be taken as two. 
This is clearly 
seen in the calyx. 
In the corolla the 
whorl consists. of 
four leaves (pro- 
bably produced 
by the branching 
of two) in the 
diagonal _plane 
(Fig. 103). The 
| | stamens are in 
Fic. 104.—LoNGITUDINAL SECTION two whorls, the 
or WALLFLOWER outermost consist- 
ing of the two short stamens, and the innermost of the four 
long stamens, probably derived from a primitive form which 
had but two. The gvnecium consists of two carpellary leaves. 
Type. 


