OF THE GENUS SYMPHYTUM. 503. 
Calyx scarcely accrescent in fruit, shortly campanulate 
with acute or subacute teeth ; lower leaves gradually 
attenuate into the broad рейо]е................ ‚. 17. S. brachycalyx, Boiss. 
Division П. SIMPLICIA. 
19. Root thick and tuberous or slender and bearing tuber- 
cles; leaves attenuate at the base or the lowest 
subcordate or rounded .......................... 20. 
Root with cylindric thickenings ; leaves broadly ovate, 
cordate, rarely only rounded at the base .......... 25. 
20, Corolla-scales included ............................ 2]. 
Corolla-scales exserted ............................ 24. 
Section 6. Tuberosa. 
2]. Lower leaves nearly as large as the middle stem-leaves; 
stem with short internodes ...................... 90. S. mediterraneum, Koch. 
Lower leaves much smaller than the middle stem- 
leaves ; stem taller with longer internodes ........ 22. 
29. Root slender with tubercles at intervals, simple ...... 91. S. Gussonei, Schultz. 
Root thick, tuberous, branched .............. eh 23. 
28. Leaves ovate-lanceolate or elliptic, 2-3 times as long as 
broad ........................ ee rne 19. S. tuberosum, Linn. 
Leaves linear-lanceolate, about 5 times as long as broad ; 
calyx-segments very narrowly subulate............ 5. tuberosum, Linn, var. angus-. 
24. Lower leaves smaller than the middle stem-leaves ; [tifolium, Kern.. 
stem sometimes branched above, or with rudimentary 
branches in the upper ахїїз...................... 92. S. bulbosum, Schimp. 
Lower leaves nearly as large as the middle stem-leaves, 
broadly ovate, often cordate or rounded at the base ; 
stem sometimes branched below or with rudimentary 
branches in the lower ахїЇїз...................... 23. S. Zeyheri, Schimp. 
Section 7. Cordata. 
25. Leaves large, sub-rotund, deeply cordate, nearly glab- 
rous; barren shoots erect........ TD 24. S. cordatum, Waldst. & 
Leaves smaller, cordate or rounded at the base, asperous [ Kit. 
with short stiff hairs; barren shoots decumbent .... 25. S. grandiflorum, DC. 
1. S. OFFICINALE, Linn., Sp. Pl. ed. I. p. 136 (1753). 
Radix crassa, carnosa, fusiformis, ramosa. Caulis pilis longis conicis 
albis deflexis vestitus, ramosus, laminá foliorum decurrente alatus. Folia 
parce pilosa, raro tuberculato-setosa, radicalia et inferiora ovato-lanceolata 
in petiolum cuneatim contracta, superiora oblongo-lanceolata, a basi lata 
deeurrentia. Rachis pedicelli calyxque pilis mollibus conieis deorsum 
leviter curvatis dense vestiti. Calyx infra tertiam partem inferiorem in. 
lacinias laneeolato-subulatas acuminatas pilosas fissus. Corolla алда, 
