128 I'. W, C. Areschoug. 



that there are fewer and coarser prickles, and at the same time fewer glandules 

 and considerably smaller leaflets, it does not seem to me improbable that R. 

 lind ula, together with the whole of that group to which it belongs, original ed 

 in western Europé, from R. glandulosus. It is at all events certain, that 

 in western France, lur instance in Bretagne and Normandy, there are to be 

 fonnd many forms, which are intermediate between R. glandulosus, or the 

 nearly related R. hirtus, W. & K., and R. Radula. Also, these species have 

 several characteristics in common, for example: the hairy turiones, furnished 

 with glandules, aciculi and prickles compressed at the base and patent, the race- 

 mous panicle, whose lower branches bear Compound or simple dichasia, the 

 pednncles armed with straight, slender prickles, and the narrow, lanceolated 

 sepals. Also in the IL glandulosus, the leaves become pedate when they are 

 quinate, and the leaflets on the flowering shoots have also, sometimes, one or 

 more tooth turned from the tip of the leaflet, which is rather common in R. 

 Rad u la. When T travelled many years ago in the west of France, I did not, 

 however, direct my attention much upon the origin of the species, and there- 

 fore do not dåre to give this opinion, otherwise, than as an hypothesis, which 

 will require further examination to confirm. 



Gr. 4. Adenophori. 



12. R. infestus "Whe. in Boenningh. Prodr. Fl. Mönast. p. 153; R. 

 tgeniarum Lindeli. Nov. fl. Suec. pag. 5; Herb. Rub. Scand. n. Il), 20; turioni- 

 bus arcuato-decurvis, angülatis, lateribus planis vel saepe sulcatis, sparse pilosis, 

 ad basin aculeis minoribus, subsequalibus, a basi compressa rectis, sparsius 

 armatis, superne aculeis numerosioribus, inaqualibus & multiformibus, aciculis 

 glandulisque munitis; aculeis maximis e basi valde compresso-dilatata falcatis; 

 loliis 5-nato-pedatis— digitatis, plerumque longe petiolatis, supra obscure viridibus, 

 fere glabrescentibus, subtus canescentibus vel pallide viridibus, pubescentibus; 

 stipulis Iinearibu8; petiolis aculeis parvis, falcatis instructis; foliolis argute, in- 

 sequaliter, nonnumquam subduplicate serratis, infimis obovato-oblongis, acutis, 

 petiolatis vel subsessilibus, intermediis brevjter petiolatis, oblique obovatis, versus 

 basin subcuneatis, acuminatis, terminali bvato-obovato, longe acuminato, ad basin 

 rotundato vel subcordato, plerumque longe petiolato; ramis floriferis pilosis 

 aculeis versus apicem rami accrescentibus, interne aculeis minutis, curvatis 

 Bubsequalibus, superne nculeis insequalibus & multiformibus, falcatis & subrectis, 

 ad basin maxime dilatatis, aciculis glandulisque munitis; foliis 3-natis, stipulis 

 anguste lanceolatis, foliolis inssqualiter & haud raro subduplicate serratis, late- 



