Planche 2. 



Buissons alpestres, 



Fig. 1. Rosagecilie. Buissonbas,abninehee 

 courtes et fortement ramifiees. Feuilles ar- 

 rondies ou elliptiques, niiiices, d'un vert clair. 

 cüiee.s de lonys poü.s sur les horch ; marquees 

 en rtessous (rarement aiissi h la face supe- 

 rieurc) de points bruns distincts. Sepales 

 plus lon<>-.s quo larj;es; covolle d'un pouri;re 

 moins foncc quo ehez le No. 2, fleurissant 

 plus tot, 



Rochcrs, surtout sur lo caleaire, de I4üu 

 k 2500 m. 



Fig. 2. Rosage ferrugineux. Buissoneleve, 

 k branches longues, peu ramifiees. Feuilles 

 elliptiques ou lanceolees, d'un vert fonce, 

 non ciliees sur los bords; couvertes eu des- 

 sous de poils ecailleux, couleur de rouille. 

 Sepales plus larges que longs, eorolle d'un 

 pourpre intense, fleurissant plus tard que 

 le No. 1. 



Plante de l'humus et de la tourbe, sur- 

 tout sur les terrains sehisteux et siliceux, 

 de 1300 a 2500 (descendant souvent dans la 

 plaine le long des torrents alpins, en par- 

 ticulier au Tessin). 



Fig. 3. Daphne strie. Differe des Rhodo- 

 dendrons par le nianque du ealice et par la 

 eorolle divisee en quatre (et non en cinq) 

 lobes; fleurs d'un parfum tres prononce. 



Commun dans les endroits pierreux, 

 les gazons eleves, de 1700 ä 2800 m. 



Fig. 4. Bruyere incarnate. Feuilles 

 etroites, aciculaires, ealice et eorolle rouge, 

 etamines brunes, faisant saillie hors de la 

 eorolle. 



Commune surtout dans la region des 

 forets sur des pentes exposees au soleil, 

 jusqu'ä 2700 m. 



Fig. 5. Raisin d'ours. Feuilles epaisses, 

 coriaces, non ponctuees en dessous (ce qui 

 les differencie de l'airelle rouge). 



Pentes exposees au soleil, surtout dans 

 les terrains ealcaires, jusqu'ä 2760 m. 



Fig. 6. Azalee couchee. Feuilles epais- 

 ses, coriaces, aux bords enroules en dessous. 

 Buissons couches. 



•Surtout sur les cretes, les plateaux ele- 

 ves; tapissant souvent les rochers. De 1800 

 ä 3000 m. (descendant rarement ä 1100 m.). 



Plate 2. 

 Alpine-Shrubs. 



Fig. 1 and 2: The two Roses des Alpes 

 (Genus Rhododendron). 



Fig. 1. Hairy Rose-bay. Low thickly 

 branched shrubs with short twigs; leaves 

 roimd or elliptieal, thin, and of a cheerful 

 green, ciliated on the margin with long 

 hairs; on the under side (more rarely also 

 on the Upper one) with scattered brown 

 seales ; lobes of the calyx more long than 

 broad; the corolla is rather more lightly 

 eoloured and opens earlier than Ihat of No. 2. 



Rock plant, prefering chalk, frora 1400 

 to 2500 m. 



Fig. 2. Rust-Ieaved Rose des Alpes. Shrub 

 higher and less branched but with longer 

 twigs ; the dark green elliptieal or long- 

 laneetshaped leaves, rolled back at the mar- 

 gin and without eiliae, thickly covered with 

 seales on the lower side, later rusty brown ; 

 lobes of the calyx broader than long; co- 

 rolla crimson; flowering later. 



Growing on mould and peat especially 

 ou the primary formations, 130C— 2500 m. 

 (in Ticino often lower down). 



Fig. 3. Striated Mezereon. Easily dis- 

 tinguished from the Roses des Alpes by the 

 want of a calyx and by the 4 lobes of its 

 corolla (instead of 5) ; strongly scented. 



Widely distributed on stony places, on 

 the mould of aretes etc., from 1700— 2.500 m. 



Fig. 4. Fleshcoioured Heath. Leaves 

 needleshaped ; calyx and corolla red ; sta- 

 mens protruding, brown. 



Widely spread espec. in the wooded re- 

 gions on sunny slopes, ascends up to 2700 m. 



Fig 5. Red Bear-berry. i^eaves thick 

 and leathery, on the upper side of a glossy 

 green, on the under side without sunken 

 dots (distinction from Cowberry). 



Sunny slopes, espec. on chalk, up to 

 2760 m. 



Fig. 6. Trailing Azalea. Leaves thick 

 and leathery, rolled back on the niargin. 

 A small creeping shrub forming carpets. 



Espec. on aretes, high-lying Plateaux, 

 often covering boulders with trellicelike 

 masses, from 1800—3000 m. (rarely already 

 at 1400 m.) 



Note. In those spots where both kinds 

 of Rose des Alpes grow together (which 

 does not rarely occur on schist and on many 

 elayey chalks of the cretaceous formation) 

 a crossbreed is often foi-med (Rhododendron 

 intermedium Tausch.). This is produced by 

 honey gathering insects transporting the 

 poLlen of the one species on to the stigma 

 of the other kind. The crossbreed sways 

 in its charaeteristics between the two parent 

 forms. 



