68 



NATURAL mSTORY OF PLANTS. 



surface, and formed like those of the other Banu?ictdacca (hg. 109). 

 Like Clematis and Tludivtnnn, any of the species of Adcea may, 



chiefly owing to cultivation, acquire petaloid laminse of variable size 

 and position,' which represent the outer stamens transformed into 

 staminodes (flgs. 1 06, 107). They are herbaceous plants found in the 



Fig. 107. 

 Longitudinal section of flower. 



Actcea spicata. 



Fig. 108. 

 Fruit. 



Fig. 109. 



Transverse section of fruit. 



cold and temperate regions of Europe,"' Asia,' and North America.' 



* In A. spicata we may observe four or five 

 petaloid staminodes nearly exactly alternate with 

 the sepals (as in figs. 106, 107), but this position 

 is not constant. We also find nearly complete 

 alternation in the tetranicrous flower of A. 

 brachypntala, represented in fig. 104. In Cimi- 

 cifutfa frifjida Walt,. and Arlinospora dahurica 

 Fiscn. & Met., are often seen the whole set of 

 transitional forms between entire petals, bifid 

 petals, and stamens with bifurcated filaments, 

 each branch of whicli su]iports an abnormal 

 anther-cell. 



^ Gben. & GoDK., Fl. Fr., i. 51.— Reichb., 

 Icon., iv. 121. — H. Bn., Adansonia, iv. 54; 

 Diet. Encycl. Sc. Med., i. 665. — Walp., Rep., i. 

 10 ; ii. 738; Ann., i. 5, 953 ; ii. 5 ; iv. 9. 



^ SiEii. & Zucc, Act. Phys. Monac, iii. 

 734, t. 3. — Fiscu. & Met., Ind. Sem. Hort. 

 Petrop. (1835), i. 20.— Wall., PL Asiat. rarior., 

 t. 129, 264. — Hook. F. & Thojis., Fl. Ind., i. 

 58. 



■• Hook., Fl. Bor.-Amer., t. 2. — Rafin., in 

 N.-York Med. Repos., ii. v. 350.— A. Gkay, III., 

 t. 19, 20. 



