MALPIGHIACEAE 217 



550. L.'perenne L. — Darwin found (op. cit.) that three-quarters of the legiti- 

 mately pollinated flowers of both varieties were completely fertile, while illegitimately 

 pollinated flowers of the long- and short-styled varieties were, respectively, completely 

 infertile and almost completely fertile. According to Hildebrand's investigations 

 (1864), the short-styled variety is completely infertile both with its own pollen 

 and with that from other flowers of the same plant, and even with pollen from 

 other short-styled plants, while, on the other hand, it is completely fertile with 

 pollen from long-styled flowers. 



162. Radiola Dill. 

 Minute white flowers, probably with concealed nectar. 



551. R. linoides Gmel.— MacLeod (Bot. Jaarb. Dodonaea, Ghent, vi, 1894, 

 p. 379) states that in the flowers of this species the four anthers come into contact 

 with the four stigmas, so that automatic self-pollination is inevitable. Owing to the 

 smallness of the flowers, nectaries could not be recognized. 



Visitors. — Herm. Muller observed several minute flies. 



XXIV. ORDER MALPIGHIACEAE JUSS. 



163. Camarea St. Hil. and 164. Janusia A. Juss. 



In species of these genera, there are cleistogamous as well as chasmogamons 

 flowers. 



165. Aspicarpa Rich. 



552. A. urens Rich. — H. von Mohl states (Bot. Ztg., Leipzig, xxi, 1863) that 

 this species bears cleistogamous flowers. The same is true for the species of 

 the genus 



166. Gaudichaudia H. B. et K. (Kulm, Bot. Ztg., Leipzig, xxv, 1867.) 



167. Bunchosia Rich. 



553. B. Gaudichaudiana A. Juss. (Delpino, Bot. Ztg., Leipzig, xxviii, 1870; 

 Hildebrand, op. cit., xxviii, 1870.) — 



Visitors. — These are bees — Tetrapodia, Epicharis— which cover their ventral 

 surfaces with pollen, and transfer it to the stigmas of other flowers. 



168. Coriaria Niss. 



554. C. myrtifolia L. — According to Hildebrand (Bot. Ztg., Leipzig, xxvii, 

 1869, pp. 494-5), the flowers of this species are markedly protandrous, being 

 purely male in their first stage. 



169. Hiptage Gaertn. 



555. H. Madablota Gaertn. — Lanza (' Note di biol. fior.,' 1894) states that the 

 flowers of this species are protogynous in the Palermo Botanic Garden. There is 

 a siiigle nectary between the two upper petals turned towards the floral axis. The 

 flower mechanism resembles that of Aesculus. 



Visitors. — The pollen is transferred by bees, as in the horse-chestnut. 



