166 ON THE FERTILIZATION OF SPECIES OF ONCIDIUM. 
a fertilizing influence: not one capsule swelled. By a repetition 
of this experiment on twelve flowers, I had nearly the same 
results, one flower alone producing a capsule; but this dropped 
off prematurely and contained no embryonated seeds. From 
this indication, however, of a certain degree of susceptibility in 
this plant to its own pollinie influence, I repeated the above ex- 
periment on a vast number of flowers, but the result in all was 
the same ; and I observed in no single instance even the slightest 
symptom of a capsule swelling. 
For the sake of clearness I will here give, in a tabulated form, 
the results of the above experiments, thus :— 
Unions between Oncidium microchilum, O. divaricatum var. 
cupreum, and O, ornithorhynchum. 
u H = 
© 
POSSE $3 | 42 
cas foe. 
Ss EE wg Rgl 28 
a le a Ea Slaq, 2 Aa 
9,3, BISBIS 9 Bl ga : 
"EIER: 4/2 8S) 23 | By calculation. 
ERAN 
3373158512 50 
= 08 825 a Bu Total Good 
z P P z s. 
z PSe CG seeds. seed 
1. O. ornithorhynchum by 
pollinia of O. micro- 
chilum (No. 2) ...... 8 | 3 | 3 |20,200| 4,242) or as 1000 to 210 
2. O. microchilum (No. 2) 
by pollinia of O. orni- 
thorhynchum ......... 12 | 0 
3. O. ornithorhynchum by 
pollinia of O. micro- 
chilum (No.1) ...... 8 | 5 | 4 123,360| 3,737 | or as 1000 to 160 
4. O. microchilum (No. 1) 
by pollinia of O. orni- 
thorhynchum ......... 12; 2] 0 
5. O.divaricatum eupreum 
by pollinia of O. mi- 
crochilum (Nb. 2) ...| 6| 3 | 3 |22,050| 7,938 | or as 1000 to 360 
6. O. microchilum (No. 2) 
by pollinia of O. diva- 
ricatum cupreum ...| 18| 2 |0 
7. O. divaricatum cupreum 
by pollinia of O. mi- ; 
crochilum (No. 1) ...| 6| 4 | 4 |26,240 8,922 | or as 1000 to 340 
8. O. microchilum (No. 1) 
by pollinia of O. diva- 
ricatum cupreum ..| 6| 2 2 17,700 7,484 | or as 1000 to 420 
9. O. microchilum (No. 1) 
by pollinia of O. mi- 
| crochilum (No. 2) ...| 6] 5 | 4 145,800 34,350 | or as 1000 to 750 
| 10. O. microchilum (No. 2) 
| by pollinia of O. mi- 
crochilum (No. 1) ...| 18 | 0 
ll. O. microchilum (No. 1) 
by own pollen......... 24; 110 
12. O. mierochilum (No. 2) 
by own pollen......... 24 | 0 
