562 ROSACE-S;. XIII. Tormentilla. XIV. Comarum. XV. Horkelia. XVI. Sibbaldia, &c. 



branched; leaflets 3-5, obovate, deeply toothed, haity, as well Californian Horkelia. PL 1 to 2 feet. 



as the petioles ; stipulas lanceolate, entire ; pedicels lateral, 1- Cult, The species of Horkelia will grow in any common 



flowered, long, and slender ; petals obcordate. % . H. Native garden soil, and are readily increased by dividing at the root. 



of Europe, about hedges and the borders of fields. In Britain 



in several parts of Oxfordshire, and at Braintree, Essex ; at La- 



kenham, near Norwich ; in Hertfordshire and Surrey; at Bright 



House, near Halifax, Yorkshire ; in barren grounds of Scotland. 



Smith, engl. hot. 864. Potentilla procumbens, Sibth. Potentilla 



nemoralis, Nestl. pot. 65. Plot's tormentil, Pet. herb. brit. t. 



41. f. 10. Flowers sometimes with 5 petals. 



Creeping Tormentil. Fl. June, July. Britain. PI. pros 



XVI. SIBBAXDIA (in honour of Robert Sibbald, professor 

 of physic at Edinburgh, author of Scotia lUustrata, 1G84, &c.) 

 Lin. gen. 393. Lam. ill. t. 221. D. C. prod. 2. p. 586. 



Lin. syst. Penta-Decandria^ Penta-Decagynta. Calyx flat- 

 tish, 10-cleft, the 5 outer segments accessory. Petals 5, linear- 

 spatulate. Stamens 5-10. Styles 5-10, lateral. Carpels or 

 akenia 5-10, seated on an almost naked receptacle. — Evergreen, 



3 T: humifu^sa; floriferous stems short and filiform, pro- dwarf glandless herbs with tnfohate leaves, and glomerate or 



cumbent; leaflets 5, cuneate- oblong, obtuse, deeply toothed, 



clothed with white tomentum beneath. 11. H. Native of North . . . - i- i i i *v i 



America, in the plains of the Missouri. Potentilla humifusa, ^a^^^^' cuneated and coarsely toothed at the apex, rather pilose ; 



corymbose heads of yellow or white flowers. 



1 S. procu'mbeks (Lin. spec. 406.) leaves trifoliate; leaflets 



Nutt. gen. amer. 1. p. 130. 



yraiYinfi" Tormentil. PI. trailing. 



Cult. Plants of the easiest culture and propagation ; how- 

 ever they are not worth growing except in botanical gardens, to 

 fill up the arrangements. 



XIV. CO'MARUM (from Kofxapocj comarosy the arbutus; 

 similar in fruit). Lin. gen. no. 638. Smith, engf. fl. 2. p. 433. 



LiN. GEN. Icosdndriay Monogynia. Calyx 10-parted, the 5 

 outer segments accessory and small. Petals 5, lanceolate, shorter 

 than the calyx, attached to the rim of the calyx along with the 

 stamens. Styles lateral. Carpels or akenia numerous, seated 

 on a large, dry, spongy, hairy, hemispherical receptacle. — An 

 herbaceous creeping plant, with broad pinnate and ternate leaves, 

 and terminal panicles of purple flowers. 



1 C. PALu'sTRE (Lin. spec. 718.) %. H. Native of Europe, 



flowers corymbose ; petals shorter than the calyx. 1/ 

 Native of Europe, Siberia, and North America, on high moun- 

 tains. Plentiful on the summits of the highland mountains of 

 Scotland, in micaceous soil. Smith, engl. bot, t. 897. Fl. dan. 



32. Petals small, yellow. 



Procumbent Sibbaldia. Fl. July. Scotland. PI. 1 to 3 inches. 



2 S. adpre'ssa (Bunge in Led. fl. ross. alt. ill. t. 276. fl. ah. 



1. p. 429.) leaves ternate; lateral leaflets oblong-lanceolate, 



quite entire, intermediate one cuneated, tripartite, with the lateral 



segments entire, and the middle one tridentate at the apex, 



silky beneath ; flowers with 10 stamens and 10 styles; petals 



Native of Altaia, on high 



equal in length to the calyx. %. H. 

 dry fields at the rivers Kan and Tschuja. 



PI. i foot. 



Petals white. 



Adpressed Sibbaldia. * ^- 4 *vv^»'. 



3 S. PARViFLORA (Willd. act. soc. berol. vol. 2.) leaves trifo- 

 liate ; leaflets beset with strigose pili on both surfaces; flowers 

 Siberia, and North America, in marshes ; plentiful in Britain. in glomerate heads ; petals obovate, one-half shorter than the 

 Smith, engl. bot. 173. Schkuhr, handb. t. 138. f. 1. Fl. dan, calyx, l/.H. Native of Cappadocia. Fragaria orientalis flore 



G37. Potentilla Comarum, Scop. fl. earn. ed. 2. vol. 1. p. 359. luteo, Tourn. cor. 21. Petals yellow. 



Potentilla paliistris, Lehm. pot. 32. Potentilla rijbra, Hall. fil. 

 in Ser, mus. helv. l.p. 5, 6. Root creeping. Stems ascending. 



Fl. July, Aug 



Small -Jl^ 



Cult. Sibbaldia is a genus of small alpine plants 



PL \ foot. 



They do 



Leaves pinnate. Leaflets broad, acutely serrated, green above, best in small pots in a mixture of peat, loam, and sand, and are 

 but glaucescent beneath. Flowers pedicellate, axillary, and ter- increased by dividing. 



CHAM^RHO 



minal, dark purple ; petals lanceolate, acuminated, much shorter 



than the calyx. The roots dye wool of a dirty red-colour, and ^^^^^,^^^^10^1^1^ rrose.'dwarf-rore)".' Bunge in Led fl. 

 nave astringency enough with other plants oi the same class to " ^ _ . - - _ mc 



tan leather. In Scotland the fruit are called cow-berries. 



Marsh Cinquefoil. Fl. June, July, Britain. PI. 1 to l^foot. 



Cult. This plant will grow in any kind of moist soil, and is 

 increased by dividing at the root. 



XV, HORKE'LIA (in honour of John Horkel, professor of _ 



physiology at Berlin). Cham, et Schlecht. in Linnaea. vol. 2. p. with glandular pili. Corolla white or purple 



ross. alt. ill. t. 257. fl. alt, l.p. 429. Hook. fl. bor. amer. p. 196- 

 - — Sibbaldia species of Lin. D. C. and others. 



Lm. SYST. Penfandria, Penta-Decagynia. Calyx campanu- 

 late, 5-cleft. Petals 5, obovate. Stamens 5. Styles lateral, 

 rarely 5, usually 10 or more. Carpels 5-10 or more, seated on 

 a villous receptacle.— Small plants, with dissected leaves, beset 



-i' 

 -^1 



27. Hook. fl. bor. amer. p. 196. 



LiN. sYST. Decdndria^ Polygynia, Calyx campanulatc, semi- 

 10-cleft, outer segments accessory. Petals 5, small. Stamens 

 10, inserted by 2 series in the sides of the calyx. Ovaries nu- 

 merous, seated on a dry, conical, villous, receptacle. Styles 

 simple, articulated with the ovaries, almost terminal. Akenia 

 inclosed in the calyx. — Erect herbs, with pinnate leaves, and 

 crowded terminal insignificant flowers. 



1 H. conob'sta (Dougl. mss. Hook. bot. mag. 2880.) radical 

 leaves pinnate ; leaflets cuneate-cblong, cut at the apex ; outer 

 calycine segments quite entire ; petals longer than the calyx. 

 %. H. Native of California, at Cape Mendocino, and on the 

 low hills of the Umtqua river in lat. 41° to 42°. Corolla white. 



Cronderf-flowered Horkelia. Fl. Aug. Clt. 1820- PI. 1 to 2 ft. 



2 H. Californica (Cham' et Schlecht. in Linnaea. 2. p. 27.) 

 erect, clothed with viscid pili ; leaves pinnate and pinnatifld ; 

 flowers panicled ; petals shorter than the calyx. ](/. H. Na- 



.tivc of California. Sibbaldia Californica, Spreng. syst. app. p. 

 341. Corolla white. 



1 C. ere'cta (Bunge in Led. fl. alt. 1. p. 431.) ^ierbaceoi«i 

 pubescent ; stems elongated, racemosely panicled ; radical lea^ 

 biternately multifid, upper cauline ones S-S-cleft ; segmenw 



linear-filifnrm ? flnwprs nonfandroUS ; Styles 5-20 ; petals 



Native of Siberia, and Altaia, '" 



ceeding the calyx. ^ . F. 



pine woods, and 'of North America about Carlton House, on 

 Saskatchawan, as also among the Rocky Mountains. — ^Amm. ru . 

 p. 58. t. 25. Lam. ill. t. 221. f. 2. Sibbildia erecta, Lm. spec 



p. 406. Corolla purple. t>i i ft 



Erect Chamserhodos. Fl. June, Aug. Clt. 1806. PI- ^ u- 



2 C.GRANDiFLoRA (Bunge, fl. alt. l.p. 431.) stems numeroiis, 

 erect, leafy ; leaves divided into numerous linear segment^ J^^ 

 bescent ; petals twice the length of the calyx. ^ • c\^ "ra 

 of Dahuria, on granite rocks near Ouda, and at the river beleng • 

 Sibbaldia grandiflora, Pall, in Willd. rel. ex Schultes, syst. v. 

 p. 770. Corolla red, larger than that of C erecta. 



O real-flowered Chamaerhodos. PI. 1 foot. ^ v 



3 C. sAButosA (Led. fl. ross. alt. ill. t. 257. fl. alt. 1. p- "-^ 



niant SuffVutlrncr. rlntht^il wuli rlamn^VVllli. tuftcd ; SteUlt » 



