500 MH. C. BUCKNALL : A REVISION 
This study has convinced me that the genus 1х naturally divided into two 
sections, one containing the plants with a branched stem and fusiform root, 
and the other those with a simple stem and a more or less ereeping and 
tuberous root. Of these sections the two British species of Symphytum are 
examples, the Ramosa being represented by S. officinale, and the Simplicia by 
S. tuberosum. 
The Ramosa may be readily divided by the ebaraeter of the calyx, as to 
whether its segments are longer or shorter than the calyx-tube. The groups 
thus formed may be subdivided by the leaves beiag decurrent or not, by the 
colour of the flowers, and by the corolla-seales being included or exserted, 
By these means well defined sections are formed, in which the species are 
connected by important characters, There are some cases in which it is 
difficult to decide on the true relationship of the plant, but I believe that on 
the whole no species will be found to be far from its proper position in the 
arrangement I propose. 
CONSPECTUS OF THE SECTIONS, 
Division I. RAMOSA. 
Subdivision i. SEGMENTATA, 
Section 1. Officinalia. 5. officinale, Linn., S, uliginosum, Kern. 
Section 2. Cærulea. S. asperum, Lepech., S. peregrinum, Ledeb., S. sepul- 
erale, Boiss. & Bal., S. armeniacum, Bucknall. 
Section 3. Albida. S. Гамен, Willd., S. sylvaticum, Boiss., S. anatolicum, 
Boiss., У, offomanium, Friv. 
Subdivision il. DENTATA. 
Section 4. Orientalia. S. orientale, Linn., S. kurdicum, Boiss. & Hausskn., 
S. caucasicum, Bieb., S. foribundum, Shuttlw., S. pseudobulbosum, 
Azn. 
Section 5. Suborientalia. S. palestinum, Boiss, S. breehgealgr, Boiss., 
S. Bornmuelleri, Bucknall. 
Division I. SIMPLICIA. 
Section 0. Tuberosa. S. tuberosum, Linn, S. mediterrancum, Koch, S. Gus- 
sonei, Schultz, S, bulbosum, Schimp., S. Zeyheri, Schimp. 
Section 7. Cordata. — S. cordatum, Waldst. & Kit., S. grandiflorum, DC, 
