200 



BOTANICAL GAZETTE. [ August, 



Some notes on Hypericum-— In the Botanical Gazette for April 

 and May, 1886, was published my revision of North American Hyper i- 

 cacese ; while in the number for October, 1886, were published further 

 notes and a description of a new species, H. lobocarpum Gattinger, from 

 the " oak-barrens " of W. Tennessee and probably W. Mississippi. A few 

 additional notes are made at this time to record our present knowledge 



of this group. 



The interesting new species H. lobocarpum was found growing 



abundantly near Lake Charles, Louisiana, in July and August, 1888, by 



Prof. W. W. Daves. The range of this species is therefore extended over 



the Lower Mississippi region, from Tennessee southward. It should be 



looked for in E. Arkansas. 



I am informed by Dr. Watson that during Dr. Gray's last visit to 

 Paris, in 1887, he re-examined the types of Hypericum there, and states 

 positively that Lamarck's H. cistifolium is neither H. opacum Torr. & Gray, 

 as he first thought, nor R. nudiflorum Michx., as I considered it in the re- 

 vision, but H. sphwrocarpum Michx. Therefore H. sphazrocarpum Michx. 

 must become H. cistifolium Lam., and H. cistifolium of my revision, not 

 Lamarck, becomes again H. nudiflorum Michx. 



Another correction may as well be made. Under H. opacum Torr. & 

 Gray, in the revision, H. cistifolium is quoted as a synonym, with the au- 

 thority "Watson, Bibl. Index. Polypet. 125, not Lam." This authority 

 should be changed so as to read " Torr. & Gray, Fl. i. 674, and later authors' 

 not Lam."— John M. Coulter, Craufordsville, Ind. 



Sterility of violets.— It is a curious fact that with the remarkable 

 arrangements for cross-pollination in numerous species of violets they 

 rarely cross-fertilize. In order to assure myself of this conclusion, I 

 removed a number to my garden several years ago. I have V. sagittate, 

 V. pedata, var. bicolor, V. striata, V. Canadensis, V. palmata, "var. cucul- 



undST 



? 



I have never had a petaliferous flower bear seed. This one was growing 

 on a very dry rockery. They all bear fruit abundantly from cleistogene 

 flowers. The perfect flowers, on my grounds, are not cross-fertilized by 

 insect or any other agency. They are not fertilized at all. Though 

 environment (whatever that may mean) has undoubted influence on 

 determining the development and functional powers of stamens and pis- 

 tils, I incline to the belief that the same facts will be found generally else- 

 where.— Thomas Meehan, Germantown, Penn. 



Dionsea muscipula.— I have had under observation a flowering plant 

 of Dionxa muscipula Ellis, and the following notes may be of interest : 

 Of the seven flowers of the irregular umbel, the uppermost opened first. 

 The ten stamens were mature and copiously discharging pollen, while 

 the style was small, and leaning towards one side, the stigmas undevel- 

 oped. Thirty-six hours later the fringed stigmas unfolded, and spread 



