3096 



SAXIFRAGA 



SAXIFRAGA 



petals obovate-cuneate, the apex obtuse, 5-7-, rarely 

 9-nerved, 2 or 3 times longer than the calyx-lobes. 

 May-July. Boreal and alpine Eu., Asia, and N. Amer., 

 southward in the Rocky Mts. to Ariz. J.F. 3:237. Gn. 

 W. 25:530. It requires a moist boggy situation and is 

 difficult to carry through the winter. 



Section XI. ROBEHTSONIA. 



A. Lvs. of the rosette obovate or obovate- 



oblong, attenuate to a flat petiole. 

 B. Blades of Ivs. very glabrous: panicle- 

 branches 1-3- fid 63. cuneifolia 



BB. Blades of Ivs. sparsely hirsute: pan- 

 icle-branches 3-6-fld 64. umbrosa 



AA. Lvs. of the rosette ovate or orbicular; the 



petiole round or roundish 65. Geum 



63. cuneifolia, Linn., sometimes misspelled cunsei- 

 folia. Laxly cespitose, 4-6 in. high, with slender sub- 

 ligneous caudicles: sts. slender, erect, short-glandular 

 and naked: Ivs. very glabrous, rather thick, the upper 

 surface dark green and shiny, the lower paler and dull 

 or violet, obovate or subrotund, very obtuse, cuneately 

 attenuate to a long flat ciliate petiole, margin slightly 

 cartilaginously repand-crenate : infl. a loose panicle with 

 1-3-fld. branches: fls. white; calyx-lobes oblong-trian- 

 gular, very obtuse; petals oblong, 3-nerved with a 

 yellow spot at the base (occasionally also spotted with 

 purplish red dots). June, July. Mountains of Eu. 

 There is a form of this species which is grown as S. 

 Bucklandii, Hort., which only differs in having 2 or 3 

 yellow spots on each petal. 



Var. subintegra, Ser. (S. apennlna, Bert. S. cunei- 

 folia var. appenina, Koch. S. capillipes, Reichb.). 

 Caudicles long, scantily Ivd., forming a rosette at their 

 tip: lys. smaller, retuse, few-dentate or entire, petiole 

 equaling the blade: sts. few-fld., simple paniculate. 

 Switzerland, Tyrol, Apennines, and Maritime Alps, 



64. umbrosa, Linn. LONDON PRIDE. ST. PATRICK'S 

 CABBAGE. Loosely cespitose, 6-12 in. high, with sub- 

 ligneous caudicles: sts. erect, naked: Ivs. forming a 

 dense rosette 6-12 in. across, rather thick, leathery, 

 gray-green, dull shiny, lower surface tinged reddish or 

 violet, oblong or obovate-oblong, sparsely hirsute, very 

 obtuse, attenuate to the ciliate (rarely glabrous) petiole, 

 margin obtusely crenate: infl. laxly paniculate with 

 3-6-fld., shortly glandulose-hirsute branches: fls. white, 

 varying pink; calyx-lobes oblong, rather obtuse; petals 

 oblong-ovate, 3-nerved, with several red dots at their 

 base and a yellow spot in the middle. June, July. Eu. 

 A very neat and attractive plant, frequent in Euro- 

 pean gardens, but rarely seen here. Var. acanthifdlia, 

 Hort., is offered in the trade. Var. bellidifdlia, Hort., is 

 offered in the trade. Var. crassiphylla, Hort., is offered 

 in the trade. Var. erosa, Hort., is offered in the trade. 

 Var. fdliis-variegatis, Hort., a form with the Ivs. varie- 

 gated. Var. gracilis, Hort., is offered in the trade. Var. 

 marmorata, Hort., is offered in the trade. Var. prim- 

 uloides, Hort. (S. primuloldes, Hort.), is described as 

 follows: Will grow in sun, but prefers entire or partial 

 shade. It forms masses of dark green rosettes of primula- 

 like Ivs., whence rise a host of slender sts. about 6 in. 

 high, bearing little fls. of a kind of rose-pink (fls. also 

 stated to be bright carmine-rose). Var. rotundif61ia, 

 Hort., is offered in the trade. Var. serratifMa, Don. 

 (S. serrata, Sternb. S. serratifdlia, Mackay), is a form 

 with erect, oblong Ivs. whose margins are acutely serrate. 

 Ireland. There is a form of this variety known as S. 

 umbrosa serrata minor. Var. variegata, Hort., is a 

 form with the Ivs. variegated with white. 



65. Geum, Linn. (Micrdnthes Geum, Small). Six to 

 12 in. high, with subligneous caudicles: sts. nearly 

 naked, erect, glandular-hirsute: Ivs. variable, reni- 

 form-cordate, margins cartilaginous, crenate, the crena- 

 tions equal except toward the very top where they are 

 shorter, both surfaces but especially the lower hirsute, 



petioles 3-4 times longer than the blade and channeled 

 above: infl. paniculate, the branches 3-6-fld., pedicels 

 slender; fls. white; calyx-lobes oblong, obtuse; petals 

 ovate-oblong, twice as long as the calyx-lobes, with a 

 yellow spot at their base and occasionally with several 

 smaller purple-red dots. May, June. Pyrenees, Ire- 

 land and said to occur in Newfoundland. A species in 

 common cult, abroad and very variable, by some con- 

 sidered as a variety of S. umbrosa. Var. crenata, Hort., 

 (S. umbrosa var. crenata, Ser.). Lvs. crenate or crenate- 

 dentate: fls. pink, unspotted. Pyrenees. Var. crinitum, 

 Hort., is said to resemble a refined form of S. umbrosa. 

 Var. dentata, Engl. (S. dentata, Link. S. hirsuta, Linn. 

 S. umbrosa var. hirsuta, Hort. S. umbrosa var. dentata, 

 Hort.). Lvs. rather glabrous or hirsute, orbicular, 

 acute-serrate: fls. white with 1 yellow dot or even 

 several purple dots on each petal (by some said to be 

 unspotted) . 



Section XII. EUAIZOONIA (CHONDROSEA). 



A. Fls. white (frequently dotted with red or 



purple) . 

 B. Margin of the lower Ivs. refiexed and 



crenulate or almost entire. 



c. Upper surface of lower Ivs. convex.66. longifolia 

 CC. Upper surface of lower Ivs. sulcate 



or flat. 

 D. Surface of If. sulcate. 



E. Lower Ivs. more or less spatu- 



late or obovate. 

 F. Apex of Ivs. rather acute: 



calyx-tube glabrous 67. lingulata 



FF. Apex of Ivs. more or less 

 obtuse: calyx-tube gland- 

 ular. 



G. Lvs. obovate-ligulate .... 68. catalaunica 

 GG. Lvs. linear at base, 

 spreading above into a 

 spoon-shaped blade. . .69. cochlearis 

 EE. Lower Ivs. linear: the plant 



1-3-in. high 70. crustata 



DD. Surface of If. flat 71. Hostii 



BB. Margin of the lower Ivs. not refiexed, 



serrate. 

 c. Fl.-sts. paniculate above. 



D. Cauline Ivs. oblong, obtuse 72. altissima 



DD. Cauline Ivs. spatulate or oblan- 



ceolate, acute. 



E. Calyx-lobes ovate; petals obo- 

 vate or elliptic. 



F. The Ivs. spatulate 73. Aizoon 



FF. The Ivs. oblong or obovate. .75. cartilaginea 

 EE. Calyx-lobes lanceolate-elliptic; 



petals oblong-elliptic 74. Zelebori 



CC. Fl.-sts. paniculate, branching from 



the base 76. Cotyledon 



AA. Fls. commonly not white. 



B. Petals pink or purple (sometimes 



white or white tinted pink) 75. cartilaginea 



BB. Petals yellow, red-orange or copper- 

 colored 77. mutata 



66. longifSlia, Lapeyr. One to 2 ft. high: st. erect, 

 densely glandular: Ivs. basal, very numerous, forming a 

 thick rosette which is frequently 6-7 in. diam., convex, 

 linear-lanceolate, light or gray-green edged silvery, 6 

 in. long, base ciliate, margin erose-crenulate : infl. a 

 full, pyramidal panicle, branched from the base, many- 

 fld., everywhere glandulose-pilose : fls. white, sometimes 

 dotted purple toward the center; calyx-lobes ovate or 

 oblong, obtuse; petals obovate, 3-nerved, the midnerve 

 usually bifid toward the apex. June, July. Pyrenees. 

 B.M. 5889. G.C. III. 28:402; 39:149; 52:244, 245. 

 Gn. 66, p. 105; 70, p. 124; 72, p. 142; 76, p. 103. G.W. 

 10, p. 91. G. 14:347. This species will grow in any 

 rock crevice and is very showy in If. and in fl., but it has 

 the unfortunate habit of dying when through flowering. 

 Prop, by seed but care must be taken as it hybridizes 

 very readily. Var. hybrida, Hort., is a form which is 

 offered in the trade: grows 18 in. high: fls. white. Var. 

 magnifica, Hort., is a form with large rosettes up to 



