212 



ANGIOSPERMAE—DICOTYLEDONES 



153, Anoda Cav. 



Protandrous pollen flowers. 



531. A. hastata Cav. (Hildebrand, ' Die Geschlechtsvert. b. d. Pfl.,' 

 pp. 48-9.) — As in the case of Malva, the anthers at first form a pyramid, which 

 encloses the still undeveloped styles. The upper stamens are erect, the lower ones 

 are curved back. The anthers of the upper stamens dehisce first ; those of the 

 lower ones follow them, and at the same time their filaments become upright. We 

 can now see the styles, which are curved downwards, arranged in five bundles, 

 and closely apposed to the column of filaments. This is beset with hairs, which 

 project between the bundles of styles, protecting the reddish stigmas from contact 

 with insect visitors. When the dehisced stamens curve backwards, the styles erect 

 themselves, so that the stigmas take up the position occupied by the pollen-covered 

 anthers during the first stage of anthesis. 



Fig. 64. Afioda /tasfa/a, Cav. {Sifter HiMehnnd), a. Condition in the bud. <5. Beginning of the first 

 (male) stage : some of the stamens are erect and covered with pollen. c and d, Male stage : all the 

 stamens are erect and their anthers are covered with pollen, while the styles (rf)are still cur\'ed downwards. 

 €. Second (female) stage ; the styles have become erect. 



154. Goethea Nees. 



532. G. coccinea. (Delpino, ' Altri appar. dicog. recent, osserv.,' p. 59 ; Hilde- 

 brand, 'Die Geschlechtsvert. b. d. Pfl.,' p. 19.) — In this species the nectar is secreted 

 by five glands at the bottom of the calyx. The corolla forms a nectar-cover, and 

 the four petals make the protogynous flower conspicuous. 



Visitors. — Delpino supposes that these are bees or humming-birds. 



155. Pavonia Cav. 



533. P. hastata Cav. — Heckel (C.-R. Acad, sci., Paris, Ixxxix, 1879) states 

 that this species possesses cleistogamous flowers. 



