ROSACES. I. DRYAS. II. GEUM. 



525 



FIG. 69. 



ated by a style, which at length becomes a feathery tail (f. 69. 

 e.). Seed ascending. Humble suffruticose herbs, with simple 

 permanent leaves, which are clothed with white tomentum be- 

 neath. Flowers white, or yellow. 



1 D. OCTOPE'TALA (Lin. spec. 

 717.) leaves ovate or subcordate, 

 crenately serrated. ^ . H. Na- 

 tive of Europe on the Alps, and 

 of Siberia. In Scotland, as in 

 Breadalbane, Isle of Sky, Perth- 

 shire, Rosshire, Sutherland, and 

 Argyleshire ; in Ireland, between 

 Gort and Gallaway, and near 

 Sligo ; in England, on Amdif- 

 cknvder, in Littendale, and near 

 Settle in Yorkshire. Smith, eng. 

 hot. 451. Oed. fl. dan. t. 31. 

 This delicate evergreen plant, with 

 its white flowers and germander- 

 like leaves, is a great ornament to 

 alpine heights. 



Eight-pe tailed Dryas. Fl. Ju. 

 Aug. Britain. Shrub prostrate. 



2 D. DRUMMONDI (Richards, mss. Hook, in bot. mag. t. 

 2972.) leaves elliptic, rather attenuated at the base, deeply cre- 

 nated, clothed with white tomentum beneath, and on the scapes ; 

 calycine segments ovate. T? . H. Native of North America, 

 Canada, and the Rocky Mountains as far as Slave Lake. D. 

 octopetala, Pursh, fl. amer. sept. 1. p. 350. D. chamaedrifolia, 

 Richards in Frankl. journ. append, p. 740. Flowers yellow. 

 An elegant plant when in flower. 



Drummond'sDryas. Fl. June, July. Clt. 1800. Sh. pros. 



3 D. INTEGRIFOLIA (Vahl. act. soc. hafii. 4. p. 2. p. 151.) 

 leaves quite entire, acute, cordate at the base. fj . H. Native 

 of Greenland. Oed. fl. dan. 1216. Flowers white, very like 

 those of the first species. 



Entire-leaved Dryas. Fl. June, Aug. Clt. 1810. Sh. pros. 



4 D. TENE'LLA (Pursh, fl. amer. sept. 1. p. 350.) leaves small, 

 ovate, acute, quite entire, cordate at the base, flat, clothed with 

 white tomentum beneath. Jj . H. Native of North America, in 

 New Hampshire, Rocky Mountains, &c. D. integrifolia, Hook, 

 exot. fl. t. 220. but not of Vahl. D. integrifolia var. ft, tenella, 

 D. C. prod. 2. p. 550. Flowers white, one-half smaller than 

 those of the last species. An elegant plant when in flower. 



Slender Dryas. Fl. June, Aug. Clt. 1820. Sh. proc. 



Cult. Dryas is a genus of elegant little evergreen, prostrate 

 plants ; they thrive best in a border of peat soil, and sometimes 

 they are grown in pots in the same kind of soil, and placed 

 among other alpine plants. They are usually increased by di- 

 viding the plants at the root, and sometimes by seed. 



II. GE'UM (from yivw, gerto, to give a relish ; roots of G. 

 urbanum). Lin. gen. 864. Lam. ill. 443. Nestl. pot. p. 16. 



LIN. SYST. Icosdndria, Polygynia. Calyx with a concave 

 tube, and a 10-cleft limb, the 5 outer segments accessory. 

 Stamens numerous. Carpels dry, disposed in a head, ending 

 each in a style, which at length becomes kneed. Seed as- 

 cending. Herbs, with variously dissected leaves, the terminal 

 lobe or leaflet always large. Flowers usually yellow or copper- 

 coloured, red or white. 



SECT. I. CARYOPHYLLA'STRUM (Caryophyllus, the name of the 

 clove pink ; the roots of G. urbanum have a taste like cloves). 

 Ser. in mem. soc. gen. 2. p. 138. D. C. prod. 2. p. 550. Flowers 

 ascending. Calyx reflexed. Styles deflexed, kneed. Appen- 

 dages for the most part shorter than the styles. 



1 G. CANADE'NSE (Murr. comm. gcet. 5. p. 33. t. 4. but 

 not of Jacq.) stem erect, rough, dichotomous ; radical loaves in- 

 terruptedly pinnate, the terminal leaflet large, nearly orbicular, 

 3-5-lobed, and crenated ; cauline leaves quinately and ternately 

 pinnate, with the leaflets lobulate and toothed ; stipulas ovate, 

 3-5-lobed ; peduncles elongated ; petals orbicular, retuse, length 

 of the calyx ; head of carpels obovate ; ovaries pilose, very nu- 

 merous ; styles glabrous, but with the appendages pilose. I/ . H. 

 Native of North America. G. strictum, Ait. hort. kew. ed. 1. 

 vol. 2. p. 217. Petals yellow. 



Canadian Avens. Fl. May, June. Clt. 1778. PI. 1| foot. 



2 G. STRI'CTUM (Pursh, fl. amer. sept. 1. p. 351.) hairy; 

 leaves all interruptedly pinnate, the terminal leaflet the largest ; 

 leaflets ovate, toothed ; stipulas cut ; the 5 outer calycine seg- 

 ments linear and short ; petals nearly orbicular, longer than the 

 calyx; awns of carpel naked and hooked. If.. H. Native of 

 North America, from Canada to New York, in dry wet meadows 

 and bogs. G. Allepicum, Jacq. icon. rar. 1. t. 93. Flowers 

 large, yellow and striped. 



Straight Avens. Fl. May, July. Clt. 1778. PI. 2 feet. 



3 G. MACROPHY'LLUM (Willd. enum. 557.) stem erect, rough, 

 pilose, dichotomous ; radical leaves interruptedly pinnate ; leaf- 

 lets nearly orbicular, terminal one cordate, large, and biserrated; 

 cauline leaves bluntly 3-lobed and serrated ; stipulas ovate, 3-5- 

 toothed or nearly entire ; peduncles when bearing the flowers 

 very short, but when bearing the fruit they are much elongated ; 

 petals obcordate, longer than the calyx ; heads of carpels ovate- 

 orbicular ; ovaries very pilose ; styles smoothish, but with the 

 appendages pilose at the base. "%. . H. Native of Kamtschatka. 

 Flowers yellow. 



Large-leaved Avens. Fl. June, July. Clt. 1804. PI. 1| ft. 



4 G. HETEROPHY'LLUM (Desf. hort. par. D. C. prod. 2. p. 

 550.) stem erect, flexuous, beset with spreading pili, dichoto- 

 mous ; radical leaves bluntly 3-lobed ; cauline ones somewhat 

 pinnate ; the leaflets cuneiform, lobulate, and toothed ; stipulas 

 oval, profoundly toothed ; peduncles short and stiff; petals ob- 

 ovate, about equal in length to the calyx ; heads of carpels 

 spherical, quite glabrous ; styles with short appendages. I/ . H. 

 Native country unknown. Flowers white ? 



Var. j3, elongatum (Ser. in D. C. prod. 2. p. 550.) peduncles 

 elongated ; appendages of styles longer and rather pilose ; lobes 

 of leaves more acute. 



Variable-leaved Avens. Fl. May, July. Clt. 1816. PI. 

 1 1 foot. 



5 G. INTERMEDIUM (Besser, cat. hort. crem. ex D. C. prod. 

 2. p. 550. but not of Willd.) stem erect, beset with spreading 

 pili ; radical leaves interruptedly pinnate ; leaflets ovate-oblong, 

 coarsely biserrated, terminal one large and 3-5-lobed ; cauline 

 leaves somewhat interruptedly pinnate or ternate ; leaflets of the 

 upper leaves rhomboid-lanceolate, and coarsely toothed ; stipulas 

 ovate, deeply toothed ; peduncles when bearing the fruit much 

 elongated ; petals orbicular, length of the calyx ; heads of car- 

 pels obovate-globose ; ovaries very pilose ; styles glabrous, but 

 with the appendages pilose. If.. H. Native of Volhynia and 

 Altaia, in shady places. Flowers yellow. 



Intermediate Avens. Fl. June, July. Clt. 1820. PI. 1^ ft. 



6 G. VIRGINIA'NUM (Lin. spec. 716.) stem branched, pilose; 

 radical leaves quinately pinnate, cauline ones ternate ; leaflets 

 lanceolate-cuneiform, toothed, the uppermost leaves 1-lobed, 

 and very acute ; stipulas ovate, toothed ; peduncles when in fruit 

 much elongated, filiform, and divaricate ; petals obovate, shorter 

 than the calyx ; heads of carpels spherical ; carpels few, pilose ; 

 styles elongated, and are, as well as the appendages, pilose. 

 Tf.. H. Native of Virginia and Carolina. This species comes 

 very near G. urbanum, and differs from it principally in the small 

 white flowers, and in the leaflets and stipulas being narrower. 



