aHi Mr Arnott's Tovr to the Pyrenees, 



pcstr €,'''' from the Zurich garden, there is but one seed and one 

 funiculus in each loculus ; but as I have my doubts of its being 

 well named, I will not draw the otherwise natural conclusion of 

 this character being of no importance, as in the native plant 

 there are certainly two funiculi and ovula in each loculus. As 

 to A. edentulum, halimtfolmm (with which the Pyrenean A. mci- 

 crocarpum of De CandoUe's " Regnum Vegetabile,*" " Prodro- 

 mus," and " Botanicon Gallicum,"*"* is identical), and A. macro- 

 car pum (from the Lozere, and from which A. pyrenaicum^ 

 Lapeyr. and DC. does not differ), the two funiculi are equi- 

 distant from the base of the style in the same loculus, though 

 one of the seeds may be abortive, but to those in the other lo- 

 culus I do not find them always exactly opposite : the relative 

 position, however, in the same specimen, is variable, which 

 makes me incHned to think that they are all modifications 

 of the opposite funiculi. To separate these, then, from Alys- 

 sum^ we have little left as a character except the " stamina eden- 

 tula;"" and Mr Brown very justly remarks, that, in A. calyci- 

 num, the stamina are so likewise. I pass over here the charac- 

 ter of the umbonate valves, which, in addition to those species 

 mentioned by Mr Brown, applies to A. montanum, diffiisumy 

 Lenense *, lanigerum -f, and probably the others with herba- 

 ceous stems, as well as perhaps, though not so strictly, to one 

 or two of the sufFrutescent species, as I look on that more as an 

 auxiliary than a good per se generic character. 



I have noticed above A. gnaphalodes and A. petahdes. The 

 former has the calyx slightly bisaccate at the base : the two 

 smaller stamina are furnished with a tooth-like appendage, the 

 others not ; the valves of the silicule are plane ; the funiculi 

 are horizontal ; there are from eight to twelve ovula in each lo- 

 culus ; and the seeds, as far as I could judge of the immature 



• I suspect this may be the same with A. lanigerum. The stems are her- 

 baceous and swollen in the middle : the fruit on the specimen I examined was 

 very young ; the fructiferous peduncles were patent. 



t The stems are decidedly herbaceous, and remarkably swollen in the 

 middle (tapering towards the flower and root). The root is certainly I thittk 

 annual, perhaps biennial : the stem and leaves are not woolli/ or tomentose, 

 but merely rough ; the silicule is not at all emarginated ; the fructiferous pe- 

 duncles are patent ; the seed scarcely margined. Perhaps it isonly a variety 

 of the variable A. campestre. 



