116 14. E. LEUCOSTACHYS. 



Billot! Fl. Gall, et Germ, exsic. No. 2450 (sp.) Wirfcg. ! 

 Herb. Rub. No. 84 (sp.). 



R. villicaulis Leiglit. ! Fl. Shrop. 231. Bab.! Man. ed. 1. 

 95 (excl. var. /?, y, S, and e). 



R. diversi/oUus Lindl. ! ed. 1. 93 (1829). 



R. LeigJitonicmus Bab. ! in A. N. H. ser. 1. x"vdi. 240 

 (1846); Syn. 18; Man. ed. 2. 101. Leigh fc. ! in Phytol. iii. 

 176. 



R. sylvaticus (3 villicaulis Lees ! in Steele 57. 



R. vinetorum Holandre! "Fl. de Moselle ed. 1. 267." 

 (1829). 



R. rudis y Reichenhachii Bell Salt. ! in Bot. Gaz. ii. 125; 

 in Fl. Yect. 158. 



R. conspicuus Mull.! in Flora 1858; Wirtg. Herb. Rub. 

 No. d>b (sp.). 



R. riiacroacanthus Wirtg. ! Herb. Rub. No. 9 (sp.). 



Stem arching much, more than in the typical R. leucosta- 

 chySy and usually much rounder, with frequently a few aci- 

 culi and setse. Prichles not wholly confined to the angles of 

 the stem, rather unequal, i. e. although most of them are of 

 equal size, and on the angles, nevertheless here and there a 

 smaller prickle may be found, which is usually (perhaps al- 

 ways) seated on the face. Leaves often ternate by the cohe- 

 sion of the lateral leaflets, when quinate they are usually 

 pedate. Leaflets rather thin, but coriaceous, broad, obovate 

 or roundish, unequally or doubly dentate, hairy and very 

 finely felted beneath. Panicle often with very many sunken 

 purple setse. 



This is the form under which the species is usually found 

 when growing in shade. The original R. Leightonianus has 

 a still rounder stem, and broader, thinner, more flexible, and 

 rounder leaflets. That extreme form may be traced, in 

 woods where it abounds, through all the intermediate forms, 

 to the true R. leucostachys inhabiting the exposed spots sur- 



