IN PLANTS HAVING IRREGULAR COROLLAS. 423 
Figs. 8, 9, 10, 11. Various forms of actinomorphic (pelorie) corollas, seen from 
above, That shown in fig. 10 has six petals. 
Fig. 12. Actinomorphie flower with all the spurs invaginated into the tube at 
the points s. 
13 a. Corolla which is actinomorphic as regards the size of the petals and 
the division of the tube, but having the posterior petal folded back 
and the corolla bent upwards, as shown in the figure. 
135. The same flower, from the side. 
14. Actinomorphie (peloric) flower having five spurs, all evaginated. 
15. Actinomorphic flower having six petals and six spurs, all eva- 
ginated, 
16. The abnormal flower described in the text as No. 4. Only a single 
flower of this pattern found. It has three posterior (purple) petals 
and two anterior (purplish) petals. Seen from in front. 
17. The same, seen from the side, showing complete absence of spur. 
Figs. 18-22. Veronica Buxbaumii, normal and abnormal flowers. 
Fig. 18. Normal flower. 
19. Three-petalled flower (about 5 per cent., see p. 398). 
20. Two-petalled flower (about 1 per cent.). 
21. Five-petalled flower, two petals being posterior. 
22. Five-petalled flower, two petals being anterior. 
Figs. 23-25. Figures of Streptocarpus Rexii, normal and abnormal. 
Fig. 23. Normal flower. 
24. This flower had four petals, three being fully marked as normal ante- 
rior petals are, the posterior petal being less marked. Four perfect 
stamens and five sepals, one being posterior and median. This flower 
was therefore intermediate between a normal flower and the peloric 
flower with four parts. Cf. Pl. LI. fig. 4. 
25. Flower having three anterior marked petals and four posterior un- 
marked petals. This flower has seven sepals in correspondence with 
the seven petals, but the stamens were as in the normal flower, viz. 
two perfect and two aborted. 
Prats LI. 
Figs. 1-5. Diagrams showing the disposition of the corolla and stamens in 
Streptocarpus Rexü. The ovaries are not shown, as their 
relation in the abnormal cases was not satisfactorily made out. 
In each case the petals which were marked like the normal 
anterior petals are blackened. 
Fig. 1. Normal flower: two posterior and three anterior petals. 
2. Flower having three posterior and three anterior petals. Corolla and 
stamens only. 
3. Flower having two posterior and /wo anterior marked petals. Observe 
that in this flower a single stamen stands anteriorly, i2 the plane about 
which the flower is symmetrical, while in a four-petalled flower, like 
LINN. JOURN.— BOTANY, VOL. XXVIII. 2M 
