298 
21 
99 
~—s 
23. 
24, 
25. 
26. 
THE NATURAL HISTORY OF THE FLOWER. 
EXPLANATION OF THE PLATES. 
Prats XVIII. 
Brodiea ixioides. Flower, with half of perianth removed, in early 
stage; from a photograph. Nat. size. ° 
Do. Stamen with section of perianth. Nat. size. 
Do. Tip of horn of stamen. X50. 
Do. Flower in late stage; from a photograph. Nat. size. 
. Stanhopea tigrina. Labellum and column in natural pendent position ; 
the rest of the perianth removed ; from a photograph. 3. 
. Do. The same organs viewed from below, showing the form of the 
mouth of the cage ; from a photograph.  }. 
. Do. The apex of the column with the anther, &c. ; from a photograph, 
x22, 
. Do. Pollinia, rostellum, &c. from above. Nat. size. 
. Do. The same from below. x2. 
. Do. Long. sect. apex of column, with pollinia and anther removed. 
Nat. size. 
Puatr XIX. 
Pimelea decussata, Top of flower in early stage. Nat. size. 
. Do. The same, in intermediate staze. Nat. size. 
. Do. Final stage. Nat. size. 
. Cotyledon Umbilicus. Flower. Nat. size. 
. Do. Young flower seen from the mouth. x8, 
. Do. Stigma of young flower, from side. x6. 
- Do. Stigma of old flower, from side. x6. 
. Hydrolea spinosa, Ovary and styles. 2. 
- Do. Part of corolla, with stamens attached, toshow the processes ;_ it 
has been flattened out somewhat in order to separate these. x14. 
- Do. Cross section of flower, just above the ovary. X4. 
Salvia Verbenaca. Cleistogamous flower of the smallest: size, after fer- 
tilization, The corolla has become detached and moved forwards, so 
us to be visible beyond the calyx, which was not the case before 
fertilization. x 4. 
Do. Corolla of same flower. x6. 
Do. Corolla with upper lip removed, showing the stamens and style. 
The dotted lines show their position in the lower lip. x6. 
Do. Larger flower, open at mouth. x3. 
Do. Largest flower. x1}. 
Viola tricolor. Flower with corolla reduced, especially the upper 
lip. 
a=anther ; 4=projecting end of column; c=tip of rostellum ; cp=carpel; 
¢._par=conducting parenchyma; col=column; d=central ridge of column ; 
e=ridge, bearing anther; epi=epichil; f=lateral bar of cage; 4=horn 
of stamen ; kyp=hypochil (bucket) ; 4=tip of ridge after removal of anther ; 
m=cavity in pollinium ; mes=mesochil ; n=nectary visible through corolla ; 
pet = pe 
tal; p.s=perianth lobe; po/=pollinium ; 7=rostellum; s¢=stamen ; 
stig=stigma ; sty=style; v.b=vascular bundles. 
