202 BRITISH BOTANY. 



Under the Group I. Subekecti, Lindley, are described three forms, — 

 R. idmis, R. suherectus, R. plicatus. 



Grroup II. CoRYLiroLii. R. rhaninifoUns, R. inacrophyllus, R. coryli- 

 folius, R. Salteri. 



Group III. Carpinifolii. R. cm-innifolius, R. Sprengel'd. 



Group IV. ToMENTOSl. R. discolor, R. argenteus, R. leucostachys. 



Group V. Radul.^. R. Radala, R. rudis. 



Group VI. KcEHLERlANl. R. Gimtherl, R. KoeJileri, R. Immifmm, R. 

 hirtus, R. glmidulosus. 



Group VII. C^sii. R. WaJMergii, R. nemorosus, R. cceskcs. 



GroujD VIII. Herbacei. R. saxatilis, R. arcticus, R. Ckamfemorus. 



Dryas^ L. — Perennial, herl3aceous plants^ with simple, short, 

 leafy stems. Leaves simple or compound. Flowers large, soli- 

 tary, terminal. Calyx S-lO-parted or cleft, in one row. Petals 

 8-10. Stamens indefinite. Carpels (achenia) ovate-oblong, Avith 

 long feathery appendages on a depressed, downy, minutely cellu- 

 lar receptacle. — This genus is known by its fruit, which has long 

 feathery tails, by its large solitary flowers, and by its localities, 

 mountainous or alpine heights. 



D. octopetala, L. Mountain Avens. — e.b. 451. l.c. 320. 

 A. 5. C. 9. Lat. 54-60°. Alt. 0-900 yds. Tem. 46-38°. 



Roots woody, widely spreading. Flowering-stems very short, 

 with tufts of leaves at their base ; barren stems prostrate or as- 

 cending, leafy. Leaves oblong, blunt, deeply serrated, shining 

 and green above, white below, or very downy. Petioles persist- 

 ent. Stipules linear, setaceous, hairy. Flowers white, solitary, 

 terminal on long hairy stalks. Sepals 8, rarely 10 or 6, lanceo- 

 late, uniform. Petals obovate, as many as the sepals (divisions 

 of the calyx) ! Styles densely feathery, with long silky down. 



Yorkshire, Craven district, mountainous parts of England and 

 Wales, Scotland, and Ireland. Perennial; July, August. 



Note. — This interesting plant has only recently been satisfac- 

 torily ascertained to be an occupant of the lofty mountains of 

 Carnarvon, North Wales. (See "^ Phy tologist ' for this month, 

 January, 1858, p. 313.) 



Geum, Z/. — Herbaceous, perennial, thick-rooted plants. Root- 

 leaves pinnate, with unequally lobed or toothed or incised seg- 

 ments; the terminal lobe large, the lateral very small; stem- 

 leaves usually ternate ; stipules large, leaf-like. Flowers soli- 

 tary, yellow or red or purple. Calyx in five divisions, with an 



