R0SACE.5:. 135 



serrate. Flovrcr-lipads terminal, roundish or ovate-ovoid, witli the 

 male or perfect flowers at the hase, and tlie female flowers towards 

 the apex of the head. Fructiferous calyx with 4 longitudinal 

 entire or toothed elevated rather thick wings, the intermediate 

 spaces with a network of strongly-elevated and generally denticu- 

 lated ridges. 



Var. a, platylophium. 



P. platylophium, J<yrd. Frag. VII. p. 22. 



Fruit ovate-fusiform, \ inch long, with the wings very broad, 

 with blunt denticulated edges ; the faces muricated with very pro- 

 minent sharply denticulated anastomosing ridges. 



Var. 0, stenolophium. 



P. stenolopliium, Jord. Frag. VII. p. 22. 



Fruit broadly ovate-ovoid, about \ inch long, with the wings 

 very prominent, with sharp, entire edges ; the faces with elevated 

 rather bluntly denticulated anastomosing ridges. 



On the chalky borders of fields and in cultivated sainfoin and 

 grass-fields, in which it is no doubt generally, if not always, in- 

 troduced with seed from the Continent. Rather rare. The variety 

 a I have from Combe Down, Bath, Somerset ; Bembridge, Isle of 

 "Wight ; KenUworth, Warwickshire ; variety from Newmarket, 

 Cambridge, and St. IMargaret's, Kent. The species has also been 

 found in the counties of Kent, Hants, Surrey, Essex, Suffolk, Cam- 

 bridge, Berks, and Hereford ; but, as the two varieties have not, 

 so far as I know, been distinguished in this country, I am unable 

 to give the separate localities for each, except when specimens 

 have come under my own observation. 



England. Perennial. Summer and Autumn. 



Usually a considerably larger more branched and less rigid plant 

 than P. Sanguisorba, frequently 2 or 3 feet high, with the leaflets 

 larger, those of the stem longer ; the flower-heads lai'ger and more 

 elongate ; the fruit considerably larger, with the wings much more 

 conspicuous, and what are merely veins on the faces in P. San- 

 guisorba are elevated into more or less denticulated ridges in. the 

 P. muricatum. 



I judge of M. Jordan's names from the specimens in Billot's 

 collection. There is so much difference between the fruits of the 

 two forms, that very probably they ought to be separated as sub- 

 species. Var. a somewhat resembles P. Magnolii, Spach ; but 

 that has the facial ridges produced into acute tubercles projecting 



