[82 



ed from them. But R. caesiuB, growing there, in the form of the leaves 

 as well as the uature of the turiones, so coincides with R. Are.- 

 s( hougii, tliat they are rather difficult to distinguish from one another, 

 wheu they are sterile. To the description of the R. Areschougii may be 

 added: 



Turiones ssepe bienues & lignosi vel in apice herbacei. Stipulae latse, 

 foliaceae. Sepala, ut in R. saxa t i Ii, nunc- oblonga, obtusa & apiculata (in 

 locis umbrosis), nunc lauceolata, longe acuminata, sub anthesi reflexa (in 

 R. csesio patentia). Petala sepala bis terve superantia (in R. saxatili sub- 

 sequantia vid parum longiora), sub anthesi erecta (in R. caesio expansa), 

 oblongo-obovata, longe & anguste unguiculata, undulata (in forma norveg. 

 ..vata). Torus angastus, parum excavatus (in R. saxatili urceolatus), quam 

 ob rem stanlina a pistillis parum distantia. Filameuta sequilonga, erecta, 

 conniventia (in I!, csesio insequalia, expansa & numerosiora), stylos magis 

 minusve superantia. Pistilla. receptaculo convexiusculo (in R. csesi o elongato, 

 in 1!. saxatiii planiusculo) insidentia, 10 — 12, numerosiora quam in R. 

 saxatili, pauciora quam in Ii. c a* si o, stylis stigmatibusque bene evolutis, 

 germinibus dorso pilosis. 



The closer examination whieh I have been able to make, of R. Areschougii, 

 when in flower, and the compårison betvveen this form on the one side, and 

 Ii. saxatilis and ea?sius on the other, has completely confirmed my 

 opinion thal tliis form is not a hybrid between R. saxatilis and ca;sius 

 (pagea 11 a. 1 07— 108). There are, certainly, trausitions between this form 

 and K. saxatilis. but none, at least as regards the flowers, between it and 

 Ii. csesius. The flowers of R. Areschougii can always be distinguished 

 from those of Ii. csesius or pseudo-idseus by the defiexed sepals, the erect 

 petals and lilaments and the few pistils, that are almost of the same height. 



■"■<,' » „ < » 



