IN PLANTS HAVING IRREGULAR CUROLLAS. 397 
flowers in the beds of the Botanic Garden a corolla of three 
petals was found. The beds were unfortunately weeded before 
a proper examination of these plants could be made *. 
| | } 
No of petals -213 | 4 5 5 | 
(normal) (posterior | (anterior 
paired) paired) 
10 Oct. First stubble-field ......... 2 |13| 95 0 | 0 | 
mu QE Berge | 0 | 
x 3rd Box UU EE PU 5 27 0 0 
12 Oct. 4th mr e 41.5 6 | 0 Do l 
Å Sth ie cm Per 2: IIS 0 0 
" 6th ee. Oopa 3O O 0 
93 "th m i o A) 4 | 329 | 0 0 
30 Oct. First stubble again visited 6 | 22 | 230 0 1 
i Another part of same| | | 
field as foregoing ...... 3/2, 3 0 0 | 
4 Nov. Plot of waste garden-land. 0 | 0 | 276 7 3 
9 Nov. First stubble again visited. 0 | 6 | 67 0 0 
10 Noy. Stubble near Grantchester 0 z | 152 0 0 
E T r VG 4 | 
| 
| Porcentages n. a ELS Va 
ET EE ER 
The flowers found in the two localities in which all were 
normal are not included in this table. 
We now propose to describe the abnormal forms in suc- 
cession :— 
No. 1. Corolla with five petals, two being anterior.— According 
to Eichler (* Blüthendiagramme, 1875, i. p. 210), the 4-petalled 
corolla of Veronica has been derived from the 5-petalled form of 
the other Serophulariaceæ by fusion of the two posterior petals 
to form one. He states, further, that indications of this may 
be seen in the frequent occurrence of flowers with the posterior 
petal bilobed. For a long time no flower was found by us in 
which there was any suggestion of a number of petals greater 
than four, but at length one was found in which the anterior 
petal was paired. This specimen is shown in Pl. L. fig. 22. The 
posterior and lateral petals were normal. The two anterior 
petals were similar in colour, both having the usual pale tint of 
the anterior petal, but one was slightly larger than the other. 
In another locality three other specimens having this form 
were found. Two of these had a normal calyx of 4 sepals, but 
the third had five sepals, of which two were small and were 
* In this Garden large numbers of flowers having the form of Nos. 1, 2, and 
3 were since found. Vide p. 422. 
