208 Mr. W. H. White on a new Species o^ Epilobium. 



107. Labrella P tar mica, Desm.l n. 189. Fr. El. 2. p. 149. 

 In the early part of the present year I brought from M. Des- 

 mazieres' garden at Lambersart, near Lille, a root of the double 

 variety of Achillea Ptarmica, which is there always infested 

 with Labrella Ptarmica. When the young shoots appeared 

 a few leaves were attacked, and on examining the parasite I 

 was surprised to find that, contrary to the generic character 

 given by Fries, there are distinct asci and paraphyses. Asci 

 shorty obtuse, broad above, attenuated below. Sporidia few, 

 obovate-oblong, sometimes rather contracted in the centre, 

 and there occasionally furnished with a septum. Paraphyses 

 short, flexuous, their tips obtuse or slightly clavate. Peri- 

 thecium passing beneath the hymenium of a reticulated cellu- 

 lar structure. 



Plate VII. fig. 7. a, a small portion of the hymenium ; b, asci, with 

 their sporidia and paraphyses ; c, sporidia magnified 609 diameters. 



[To be continued.] 



XXI. — On a New Species of Epilobium nearly allied to Epi- 

 lobium angustissimum and rosmarinifolium. By W. H. 

 White.* 



In 1830 a collection of seeds was sent from the Botanical Garden 

 of St. Petersburgh, by Dr. Fischer, to the Botanical Garden of Lou- 

 vain. The greater part of them were from Central Russia. Among 

 the number of packages was one of an Epilobium, without any spe- 

 cific name, and with the indication new species. 



The following particulars have been transmitted to me by M. 

 Denkalaar, chief gardener at the Botanical Garden, Louvain, rela- 

 tive to the culture of this new species of Epilobium ; and, as it con- 

 tains some interesting remarks, I thought I could not make better 

 use of them than by laying them before this Society. 



This plant has been cultivated with the greatest care ; and from 

 a minute observance of its developments, and researches made into 

 its characters, the cultivators have become convinced that up to the 

 present time, this species has neither been described nor cultivated 

 elsewhere. In order therefore to give a faithful exposition of its 

 characters, and to make it better known to the botanical world, the 



* Read before the Botanical Society of London, March 2, 1838, and com- 

 municated by the Secretary of that Society. 



