PHYTEUMA 



2613 



INDEX. 



A. Infl. a raceme or panicle. 



1. canescens, Waldst. & Kit. Scabrous, grayish 

 green: st. unbranched: Ivs. sessile; lower ones ovate, 

 crenate-serrate, narrowed at base; upper ones nearly 

 entire: fls. blue, short-peduncled, solitary, sparse. 

 Hungary, Caucasus. The plant described by Correvon 

 under this name is said to have fls. in close spikes. 



AA. Infl. a compact umbel. 



2. comSsum, Linn. Fig. 2938. The only species in 

 the genus with umbellate infl., and in which the corollas 

 are not finally split at the apex. A decumbent un- 

 branched glabrous plant, 3-6 in. high, native to the 

 Alps: fls. pale lilac below, darker purple above: roots 

 thick and fleshy, stoutly lodged in the fissures of rocks: 

 Ivs. cordate-ovate or those on the st. lanceolate, 

 coarsely toothed: the 2-lobed styles are long-protruded. 

 B.M. 6478. G.C. II. 14:177. Gn. 18, p. 245, copied in 

 Gn. 28, p. 91; 44, p. 554, and R.H. 1882, p. 452. Gn. 

 63, p. 39. J.H. III. 52:364. G.W. 8, p. 597. G.C. II. 

 26:81, copied in I.H. 34:11. Said by Correvon to 

 demand a fissure in a wall or face of lime-rock. A hand- 

 some species. 



AAA. Infl. a spike or head. 



B. Fruiting spikes long and narrow, cylindrical. 



c. Flowering spikes roundish or oval. 



D. Stigmas 2. 



3. scorzonerifdlium, Vill. Fig. 2939. This and P. 

 betonicsefolium should probably be regarded as botani- 

 cal varieties of P. Michelii, but for clearness and for 

 horticultural purposes they may be considered as dis- 

 tinct species. A native of the Alps with long-spiked 

 fls. of sky-blue (B.M. 2066, erroneously as P. betonicse- 

 folium) or purplish blue (B.M. 2271): Ivs. poly- 

 morphous. 



4. Michelii, All. This may also be distinguished from 

 P. scorzonerifolium and P. betonicsefolium by having 

 the calyx pilose at the middle, it being glabrous in the 

 other two. A native of Mt. Cenis in Sardinia, with Ivs. 

 ovate-lanceolate or narrow, not cordate: color of fls. 

 deep blue, in lengthening spikes. 



DD. Stigmas 3. 



5. betonicaefolium, Vill. Rather tall: rooUvs. cor- 

 date-lanceolate, long-stalked : bracts fewer than in P. 

 Michelii and probably not reflexed: spikes lengthen- 

 ing toward end of season, on st. nearly 20 in. high: fls. 

 blue. Eu. Not B.M. 2066, which is P. scorzoneri- 

 folium. Gn. 63, p. 57. 



cc. Flowering spikes oblong or nearly so. 

 D. Spikes dense. 



6. spicatum, Linn. Woodland plant: Ivs. ovate- 

 elliptical, serrate, often brown-blotched at base, the 

 lower ones long-stalked and cordate : fls. in a close spike, 

 white or blue, greenish at tips. Eu. B.M. 2347. Gn. 

 63, p. 57. G.W. 8, p. 596. 



7. Halleri, All. Tall and stout: Ivs. ovate-orbicular, 

 doubly and coarsely serrate, long-stalked: fl.-st. 2-2% 

 ft. ; spike ovoid-oblong, long and close subtended by 2 

 long drooping bracts: fls. dark violet to white. Moun- 

 tains in Eu. Gn. 63, p. 58. 



DD. Spikes loose. 



8. limonif&lium, Sibth. & Smith. Fig. 2939. Tall, 

 fl.-st. 20-28 in. high and branching: fls. light blue, open, 

 in a long narrow spike: this may be distinguished by 



the st.-lvs., which are few and pass into bracts; radical 

 Ivs. lanceolate, long-petioled, sparingly toothed. Asia 

 Minor. B.M. 2145 (as P. stricta). L.B.C 7:667 (as P. 

 virgata). 



BB. Fruiting spikes little elongated, merely oval. 

 c. Number of fls. about 5. 



9. pauciflSrum, Linn. Very dwarf, said by Correvon 

 to be the smallest and most tufted of the genus, about 

 3 in. high: Ivs. entire or toothed at obtuse tip; root- 

 Ivs. short, obovate-lanceolate : bracts ciliate, entire or 

 subdentate at base, never dentate at apex: fls. few in 

 heads with ovate-orbicular bracts, violet-blue. W. 

 Alps, Carpathians and Pyrenees. Gn. 63, p. 40. 



cc. Number of fls. about 12. 



10. globulariaefdlium, Sternb. & Hoppe. Probably a 

 variety of P. pauciflorum with larger sts. and Ivs. 

 widened in the upper part and toothed, and by more 

 globular heads: root-lvs. 2-4 lines longer and thrice as 

 wide, and the bracts always entire at the base: fls. 

 violet. Austrian Alps. 



2939. Phyteuma limonifolium and P. scorzonerifolium, showing 

 loose-spiked and dense-spiked forms of inflorescence. 



11. hemisphaericum, Linn. Small plant with grass- 

 like foliage, forming large tufts: Ivs. erect; root-lvs. sub- 

 entire, linear or lanceolate-linear, much or little shorter 

 than the st.: bracts ciliate, subentire, ovate-lanceolate: 

 fls. blue, white or yellowish. Granitic Alps. 



12. h&mile, Schleich. Root-lvs. linear-lanceolate, 

 narrowed at the base, upper ones remotely denticulate, 

 larger than those of P. hemisphaericum: bracts narrowly 

 lanceolate from an ovate base, sharply toothed: fls. 



