3146 



SEMPERVIVUM 



SEMPERVIVUM 



tips acute and hairy tufted; cauline Ivs., the lower 

 oblanceolate, %in. long, tips bearded, pale green, tips 

 reddish, the upper more oblong: cyme 3-4 times forked: 

 fls. 10-12-merous, %in. diam.; calyx glandular-pubes- 

 cent, segms. linear, obtuse ; petals lanceolate, acuminate, 

 apiculate. S. Eu. B.M. 6610. Allied to S. arach- 

 noideum. 



20. arachnoideum, Linn. (S. Hausmannii, Auersd., 

 not Lehm. & Schnittsp. S. piliferum, Jord.). COBWEB 

 or SPIDER-WEB HOUSELEEK. Fig. 3601. Barren rosettes 



^-%in. diam., the 

 new ones crowded 

 and sessile: Ivs. 

 about 50 to a 

 rosette, oblong -cu- 

 neate, obscurely 

 cuspidate, pale 

 green, tips of nearly 

 all the lys. con- 

 nected with long 

 soft white hairs, 

 outer Ivs. tinted 

 with red-brown on 

 the back, about 

 %in. long; cauline 

 Ivs. oblong-lanceo- 

 late, small, tips with 

 a dense tuft of hairs : 

 fl.-sts. 3-4 in. high 

 including the dense 

 few-fld. panicle: fls. 

 9-12-merous, about 

 1 in. across; calyx- 

 segms. linear ; petals 

 ^lanceolate, bright 

 "red. S. Eu. B.M. 

 68. G.L. 26:201. 

 Gn. 78, p. 437. Var. 

 tomentosum, Cariot 

 (S. tomentosum, 

 Schnittsp. & Lehm. S. Webbidnum, Hort.), has white 

 tomentose rosettes, with more obovate-cuneate Ivs. 

 and the rosettes are flatter and more compact. Var. 

 Hodkeri, Hort., is offered in the trade. Var. minor, 

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

 offered in the trade. 



21. Doellianum, C. B. Lehm. Barren rosettes Yzr 

 %in. diam., the new ones shortly peduncled: Ivs. 40-50 

 to a rosette, oblanceolate, obscurely cuspidate, pale 

 green, surface slightly hairy, the tips of only the inner 

 ones connected by a few arachnoid threads, the outer 

 J^-^gin. long, tinted with red on the back; cauline Ivs. 

 lanceolate, Yzr%J&- long, with only an obscure tuft of 

 short hairs at the tips: fl.-st. including infl. 4-6 in. high: 

 fls. 9-10-merous. bright red, in a compact, few-fld. 

 panicle; calyx densely pubescent, segms. lanceolate; 

 petals lanceolate, ^in. long. Switzerland and Tyrol. 

 Closely allied to S. arachnoideum,- by some authorities 

 considered a variant of it. 



22. Lagged, Schott (S. arachnoideum var. Ldggeri, 

 Rouy. & Fouc.). Rosettes up to K m - diam., open, the 

 young ones close to the old ones or on peduncles up to 

 1% m - long: Ivs. gray-green, red- violet at the tip, short 

 glandular-hairy, at least above, lingulate, about J^in. 

 long, apex blunt, suddenly apiculate; cauline Ivs. 

 H?-K m - long) rather close, hairy, tip tufted hairy and 

 red- or black- violet and red- or black-violet-dotted : fls. 

 bright rose, in a rather dense panicle borne on a reddish 

 st.; calyx-segms.' ovate-elongated, acute; petals oval- 

 lanceolate with the midnerve darker. Switzerland. Gn. 

 78, p. 470. Closely allied to S. arachnoideum and con- 

 sidered a variety of it by some authorities. There is a 

 strong-growing variant of this species offered in the 

 trade under the name S. arachnoideum var. Ldggeri 

 gigantea, Hort. 



3601. Sempervivum arachnoideum. 

 (XJfi 



23. Haftsmannii, Lehm. & Schnittsp. Rosette 

 medium-sized, somewhat flat: Ivs. of the rosette ovate, 

 cuspidate, glabrous, margins ciliate, tip ciliate-tufted, 

 green, brownish at the tip: fl.-st. 5-6 in. high, erect: fls. 

 12-14-merous, rose-red in a dense many-fld. panicle; 

 calyx-segms. ovate-lanceolate, acute, glandular-cilia te; 

 petals ovate to linear-lanceolate, lower surface keeled, 

 margin glandular-ciliate. Tyrol. 



24. P6melii, Lamotte; also misspelled Poemlii. Bar- 

 ren rosette !%-!% in. diam., the new ones nearly ses- 

 sile: Ivs. 50-60 to a rosette, oblanceolate, with a dis- 

 tinct cusp, a few hairs on both surfaces, the cusp 

 furnished with an inflexed tuft of hairs, outer Ivs. %-l 

 x %in., tinged with red; cauline Ivs. much imbricated, 

 lanceolate, hairy, the lower 1-13^ in. long: fl.-st. includ- 

 ing infl. 6-9 in. high, densely pilose: fls. 10-12-merous, 

 about 1 in. across, rose-red, in a panicle 3-4 in. diam., 

 its simple branches 6-12-fld.; calyx densely pilose, 

 segms. linear-lanceolate, glandular; petals linear- 

 lanceolate. France. 



25. fimbriatum, Schnittsp. & Lehm. Barren rosette 

 \-\Yi in. diam., the new rosettes nearly sessile: Ivs. 

 50-60 to a rosette, oblanceolate, obscurely cuspidate, 

 green, margins deflexed hairy, tip with a tuft of hairs, 

 outer Ivs. becoming red, /-^-Min. long; cauline Ivs. 

 pilose, lanceolate, red-tinted, much imbricated, lower 

 ones 1-1 Yi in. long: fl.-sts. including infl. 6-10 in. high, 

 densely glandular-pilose: fls. about 12-merous, 1 in. 

 across, bright red, in an open few-branched panicle; 

 calyx glandular-pilose, segms. linear-lanceolate; petals 

 lanceolate. Pyrenees and Tyrol. Gn. 78, p. 47. 



26. assimile, Schott. Rosettes of barren Ivs. lJ^-2 

 in. diam., the new ones nearly sessile: Ivs. 60-80 to a 

 rosette, obovate-cuneate, cuspidate, pale glaucous 

 green, not red-tipped, margin short-ciliate, surface 

 minutely pubescent, outer Ivs. %-l in. long: fl.-sts. 

 including the infl. about 6 in. high: fls. 12-merous, 

 about %in. across, pale rose; calyx-segms. lanceolate; 

 petals linear. Transylvania. 



27. pftmilum, Bieb. (S. anomalum, Hort.). Barren 

 rosette at most 1 in. diam., the copious new rosettes 

 shortly peduncled: Ivs. 30-40 to a rosette, oblanceolate, 

 cuspidate, green, pubescent, end mucro obscure, outer 

 Ivs. only tinted red-brown, %-J^x^in.; cauline Ivs. 

 lanceolate, hairy all over, tinted red-brown, the lowest 

 3^-Min. long: fl.-st. including infl. not more than 3-4 

 in. high: fls. few (4-8), about 12-merous, 1 in. across, 

 bright mauve-purple, in a dense head, all sessile or sub- 

 sessile; calyx very hairy, segms. lanceolate; petals 

 acuminate, very hairy outside. Caucasus. 



28. montanum, Linn. Barren rosette 13^-l^i in. 

 diam., the few new rosettes on red pilose peduncles 

 1-1 1 /2 in. long: Ivs. closely packed, 60-80 to a rosette, 

 oblanceolate-cuneate, cuspidate, green up to the tip, 

 both surfaces slightly pilose, outer Ivs. %-l x J^in.; 

 cauline Ivs. densely imbricated, lanceolate, tinted with 

 red-brown toward the tip, the lower 1-1 ^ in. long; 

 fl.-st. including infl. 3-6 in. high: fls. 12-14-merous, 

 bright mauve-red, in a very dense panicle, which is 

 lJ^-2 in. diam.; calyx very hairy, segms. lanceolate; 

 petals H-^in. long, linear-acuminate. Alps and Pyre- 

 nees. Var. glaciale, Lagg. (S. Lehmannii, Schnittsp.). 

 Lvs. linear-Ungulate, base somewhat narrowed, apex 

 bluntly pointed, upper surface weakly glandular-pubes- 

 cent; cauline Ivs. similar but shorter and brown-tipped: 

 fls. dirty red-brown, 10-12-merous; calyx-segms. linear- 

 lanceolate; petals linear. Switzerland. 



29. flagelliforme, Fisch. Barren rosette 1-1 Yi in. 

 diam., with the lax new rosettes on long spreading 

 peduncles and the small Ivs. not aggregated into a dense 

 erect head: Ivs. 40-50 to a rosette, oblanceolate, ob- 

 scurely cuspidate, surface minutely downy, pale green 

 without a tint of red-brown at the tip, margin ciliate, 

 outer Ivs. % x M m - cauline Ivs. imbricated, lanceolate, 



