Floristik, Geographie, Systematik etc. 253 



plantations of "wattle" {Acacia mollisstma), "blue gum" [Eucalyptus) 

 and pines {Pinus insignis and P. pinaster). The plates are fuU-page 

 photographs of landscapes typical of the plant formations; they are 

 excellently reproduced and extremely useful. The memoir as a 

 whole is a valuable addition to plant•geograph5^ W. G. Smith. 



Brainerd, E., Notes on new or rare violets of northeastern 

 America. (Rhodora. XV. p. 112— 115. June 1913.) 



Contains as new: Viola ciicidlata prionosepala {V. prionosepala 

 Greene), V. cucullata mia-otilis, V. finihriatula X tnloha {V. ßm- 

 byiatula X pahnata Robinson), F. fitnbriatula X palmata, V. cucul- 

 lata X triloba (F. cucullata X Palmata Rhodora), V. cucullata X 

 palmata, V. sagittata X triloba, (F. palmata yC^ sagittata Rhodora), 

 and V. palmata X sagittata. Trelease. 



Brown, W, H., The Relation of Rafflesia Manillana t o i t s 

 Host. (Philip. Journ. Sei. C. Bot. VII. p. 209 224. 10 pl. 1912.) 



Rafflesia manillana is parasitic on the roots of a species of 

 Cissus. The male and female flowers are similar in shape and color, 

 and from 15 to 20 cm in diameter. The base of the flower is em- 

 bedded in a vase-shaped mass of tissue formed from therootof the 

 host. Pollination is probably performed by insects. The ovules are 

 small and numerous with an embryosac of the usual 8-nucleate type. 



The vegetative portion of the parasite consists for the most 

 part of rows of cells, also of Strands, plates and irregulär masses 

 of tissue. The rows of cells occur in the xjdem, meduUary rays, 

 cambium, phloem and sclerenchyma of the host and apparently 

 grow, and multiply in all of these tissues, except perhaps the scle- 

 renchyma and seems to have little power ofconduction and probably 

 do but slight damage to the host. Layers of cork-like cells are 

 produced in the host around the parasite, These may cut off the 

 food supply of the host and cause its death. 



The presence of the parasite causes an excessive growth of both 

 the xylem and bark of the host in the region around the parasite 

 and also a spreading apart of the xylem rays. The growing point 

 of Rafflesia forms long before the shoot breaks through the bark 

 of the host. The vascular bundles of the parasite are concentric 

 and end in the general region of the cambium of the root. Some 

 of the xylem and sieve tubes are connected directlj'- with the corre- 

 sponding elements of the host. As the parasite grows, it cracks the 

 bark of Cissus and appears at the surface. Harshberger. 



Coker, W. C, The Plant Life of Har ts ville, S. C. (Pee Dee 

 Hist. Soc. 129 pp. pl. 15. 1912.) 



A detailed study of the Vegetation of the immediate vicinity of 

 the town where the author was born. He discusses the history of 

 exploration, the climate, the topography and geology, the soils. 

 ünder Vegetation, he describes the flora of the sandhills, uplands 

 forests, flatwoods, savannes, bays and swamps, deeper swamps 

 lakes and ponds, trees (nature and cultivated) and gives in conclu- 

 sion a list of 628 species of pteridophj'tes, native and naturalized 

 with a Statistical summary. Harshberger. 



