18 



APPENDIX. 



1216. Pert. syn. 2. p. 57. Br. in Ross" voy. ed. 2. vol. 2. p. 193. Richardson in 

 Franklin's journ. p. 740. 



Dryas tenelJa, Banks' mss. (fid. specim. a Terra Nova, ubi primum an. 1766, a D. Banks 

 detecfa) Pursh. am. 1. p. 350. 



Obs. Nimis affinis D. octopctalas, qua? differt statura saepissime majore, foliis semper lon- 

 gitudinaliter inciso-crenatis, subtus costatis venis prominulis. 



SIEVERSIA. 



SiEVEitsiA, Willden. in Mag. dsr gesell. naturf. fr. zu Berlin 5. jahrg. (1811.) 

 p. 397. charactere emcndato. 



Char. Gk\. Calyx decemfidus, luciniis altcrnis accessoriis. Petala5. Stand n a inde- 

 finite numerosa. Ovaria indefinite, ovulo adscendente. Styli terminales, continui . Ache- 

 mum stylo toto persistent i arisiaiuni. Embryo erectus. 



Habitus fere, nee omnino, Gei, quod differt Stylis genicidalis • irdc.ulo snperiore dissimili 

 sapiusque deciduo. 



Ai) utroque genere distinguendum Geum potentilloides (Coluria nob.) ob Stylum basi 

 cum apicc ovarii articulatum deciduimi, et Achcnia (glandulosa) tubo elongato turbinato 

 calycis indusa. 



Sicversix- species sunt Geum montanum et reptans Linn, radiatuin Michaux, Peckii et 

 triflormn Pursh, glaciale Adams, humilis, congesta et dilatata nob. et Geum anemonoides 

 Willden. sp.pl. f|iioc Dryas pentapetala Linn., cui certe styli terminales nee laterales ut per- 

 liiliet Willdenow in cliaraeierc generis Sicversia-, pro hat: specie solum ab illo instituti. 



32. SievIeiisia Unssii, arisl.is nudis, foliis radicalibus intcrniplc pinnatis glabris: pinnis 

 trilobi*; acct riis mi n i n mli caule unifloro subdipbyllo, petalorum venis omni- 



1ms distinctis. 



Dr.se. Jh-rhn perennis, 2— (i-imciahs, glabra. Camlex demeans, radiciformis, squamis 

 scariosis fust-is (petiolonmi ivJiquiis) leetus, infra metlietatem lib, as descendentes simplices 

 nbrillusas crassiusculas profcrens. Folia radicalia numerosa (4—7,) glabr.ustula, petiolata, 

 inlerniple pinnaia, c\stipulata, pinnis circuinscriptione ovatis cuneatisve, trifidis vel bifidis 

 (lobo guperiorc lateralinin dclicientc) basi ma-cpiali. lnferne in racllin decurreiiti, superioribus 

 np| xn i it nanis i I intci positis inter medias ; imis ipsis minimis integerrimis. Petioli 



ml'-i medium dilatati ibi.pu- seariosi, pallide fusci. Scapi ex alis foliorum radicalium vel 

 1 I" 1 ' snpeiionm. caudicis demersi, infra nudi, extra medium foliis ssepius duobus, 

 ulli-rnis, sessilibns, pimialiiidis, exstipulalis, in statu floresccnlia- (earn sca])i folia radicalia vix 

 .-eipiaiit) mvu-ein apiei<|iic scapi approximatis, in fnictiferis folia radicalia aliquoties superan- 

 libus, ;i b unit-em t-t ab a pice sa-pe distantibus ; teretes, pubeseentes, pube tlescendendo sensim 

 pairioiv. Has solitarius, erectus, ebractcatus. Calyx extus pubescens, decemfidus, tubo 

 brevi turbinato, latum* 5 mnjoiibus mtenoribus, late semiovatis, acutiusculis, quinque alternis 

 dtmidio minoribus, ovalibus, petulis oppositis. Petala 5, obovata, integerrima, venosa, aurea, 



