121 



SOME SEGREGATES OF EllODlUM OICUTAUIUM L'Herit. 



By Edmund G. Baker, F.L.S., and C. E. Salmon, F.L.S. 



(Plate 554) 



The segTe<^ate.s of Erod/toti. cicii/fo-iK in growing- in Britain have 

 never been very satisfactorily deterniined. In the present paper it is 

 proposed to deal only with the maritime forms, leaving discussion of 

 the various inland varieties for a future note. 



Through the eourtes}^ of I)r, l)e Wildeman of Brussels, we have 

 heen enabled to study the types of Dumortier's s))eeies, ]£. glutiiioHuni 

 Si E. deritafinn, described in Bull. Soc. Bot. Belg. iv. 345 (1865), 

 and as we have also had access to many authentically named s])eciniens 

 of Jordan's s])ecies, a few notes on a comparison of these with plants 

 growing in Britain may be of interest. "j6J. (jhoidulosuiii Duni," 

 often mentioned by authors, does not actually exist. 



The segregates of E. clcutarium may be conveniently divided 

 into two sections : — A. Plants conjined to sand dunes or other places 

 near the sea. B. Inland plants, which, it must be noted, often may 

 be found in sandy places near the coast also. 



In 1882, Clavaud in Act. Soc. Linn. Bord. xxxv. p. 425, published 

 a classification of the forms and varieties of E. clcutarium, based 

 mainly on the presence or absence of a furrow surrounding the pit of 

 the carjjel. The main features of his key are as follows :— 



A. cuictum. " Segments des feuilles ordinairement non decoupes 



jusqu' a la cote. Fossettes apicilaires du fruit entourees 

 d'un sillon concentri(iue lisse plus ou moins marque." 



a. cli(cropl}iillum. 



a. pallidijiorum (including parvijlorum .lord, and 



Horceanum .lord. ) . 

 h. riihrijionim ( = tr/viale Jord.). 



b. pi nipinelhe folium. 



a. ochrosfigma ( = com mi.rfum Jord.). 



h. porplnfrostigma {=prcetermissum Jord.). 



B. fossum. " Segments des feuilles ordinairement decoupes jusqu' 



a la cote ou tres pres de la cote. Fossettes apicilaires du 

 fruit non entourees d'un sillon concentrique." 



a. arcnarium {=:pilosu)n Bor.). 



a. glutinosum. 



b. vestitnm. 



c. suhglahrum. 



b. lajcuvi. 



It should be noted that Clavaud's arenarium is stated by him to 

 equal Borean's E. pilosum ; the latter is founded upon the Geranium 

 pilosum of Thuillier (Fl. Pans, ed. 2, 346, 1799), an inland plant 

 from the Bois de Boulogne and forest of Fontainebleau, described 

 as being very pilose, but no mention is made of glands. Boreau, 

 however, amplifies Thuillier's diagnosis and admits glandular plants 

 under that name, probably including some maritime forms. 



In 1905, Brumhard (Monog. 'Ubers. Gatt. Erodium) gav(i a 

 JouKNAL Of Botany.— Vol. 58. [May, 1920.] k 



