114 MR. J. SCOTT ON THE FUNCTIONS AND STRUCTURE OF THE 
- 
of the other form ; in both, however, they are of a similar (sphe- 
rical) shape. 
Amongst many failures in my experiments on effecting unions 
between the P. involucrata and other species, I succeeded in 
getting a few capsules containing good seeds by application of 
the pollen of the short-styled form of P. Sibirica to the long- 
styled P. involucrata; I had also successful results by applying 
the pollen of the short-styled form of P. farinosa to the short- 
styled P. involucrata. I have utterly failed, however, to effect 
unions by the converse experiments of the above, 7. e. by apply- 
ing pollen of the two forms of P. involucrata to those of the 
P. Sibirica and the P. farinosa. The results of the successful 
unions were as follows:—1. From the long-styled heteromorphic 
unions of P. involucrata by pollen of P. Sibirica I got four eap- 
sules, which yielded an average of ten seeds each. 2. From the 
short-styled homomorphie unions of P. involucrata by pollen of 
P. farinosa I had three capsules, and, in all, seventeen seeds; 80 
that the average in this case is reduced to about six seeds per 
capsule. If we compare these results with those given in the 
summary of the united homomorphie unions of P. involucrata in 
the following table, we see that these unions yield more seed, in 
about the proportion of three to one, than those from the hetero- 
morphic union of P. involucrata with P. Sibirica, and as five to 
one relatively to its homomorphic unions with P. farinosa. 
TABLE XI.— Primula involucrata. 
| gei eu 8 | e ves o 
ieee | pee tee Sd oes 
| S25 |328 | S33 | Poe 
| Bae | See | 222 | oF. 
Q E E 
E Sasan ad S 
& | 
Long-styled homomorphie union...... 10 6 230 38 
Long-styled heteromorphie union ... 6 4 263 66 
Short-styled homomorphie union...... Ber 7 195 28 
Short-styled heteromorphie union .... 6 5 347 69 
SUMMARY. 
The two homomorphie unions......... 24 13 425 32 
The two heteromorphie unions ...... 12 | 610 68 
In the Primula farinosa the pistil of the long-styled form is 
about twice as long as that of the short-styled form, and elevates 
the stigma slightly above the mouth of the corolla-tube, while 
the anthers are attached halfway down the latter. In the short- 
