310 '* ' ON ACNID.V. 



thinks it not unlikely to have heen unintentionally introduced there. 

 It appears to be strictly annual, but even if originally introduced 

 here will probably establish itself in suitable localities. — Ed. Jouni. 

 Bot.'] 



E.T7MEX C0NGL0MEEATU8, VUV. BoEREBI. — A.t p. 3 of this Volume 



notice is taken of a trigranulate Dock from Sussex, confounded with R. 

 rupestris in this country, and having characters somewhat intermediate 

 between R. co7iglomeratus and R. nemorosus. It is also there suggested 

 that it was probably this plant which Borrcr sent to Sowerby from 

 Sussex, and which was figured in " English Botany," t. lo33, under 

 the name of R. sanfftuneus, as stated in a previous note in the volume 

 for 1875, p. 337 (there printed acutushj an error). The examination 

 of a very extensive series of oxylapathoid Docks, made this year in 

 Sussex by Mr. Warren, seems to fully confirm this view. Among 

 them is a specimen collected at Burgess Hill, intermediate between 

 nemorosics and conglomeratus, having the erect habit and leafless whorls 

 of the former, and the narrow leaves and three well-marked tubercles 

 of the latter, with which on the whole I am inclined to put it, though 

 it might almost as well come under nemorosus. It is quite distinct 

 from R. rupestris, and, indeed, is remarkable for its small fruit, as 

 contrasted with the very large fruit of the western species. The 

 fruit is well- developed, and the plant has none of the appearance of a 

 hybrid. The old " E.B." figure fairly represents a young branch, 

 and the form may take the name of var. Borreri, after its discoverer. 

 Mr. Warren's large collection further showed that R. nemorosus does 

 occasionally devclope a smaller second, or even a still smaller third 

 tubercle ; such unequally trigranulate perianths may be not unfre- 

 qucntly found by searching for them. It is not improbable that some 

 of these puzzling plants are hybrids between the two closely-allied 

 species, R. conghmeraius and R. nemorosus. A good figure of typical 

 British R. nemorosus, with accurate details, is still a desideratum. — 

 IlENUir Trimen. 



(J N A C N I D A. 

 By Asa Gray. 



The true Acnidcc are submaritime, and have a pretty large and 

 indehisceut utricle, which is somewhat fleshy when fresh. Our 

 botanists on the whole have failed to make out more than one 

 species. 



Moquin-Tandon, in De Candolle's Prodromus, in 1849, added a 

 section, Mo7itelia, with a more membranaceous, utriculate, and smaller 

 fruit, under which he placed two species, A. tuherculata, a new one, 

 and A. rusocarpa, which he took for Michaux's of that name ; but 

 the plant he describes is not the one figured in Michaux's Flora, and 



