I08 JOURNAL OF THE ROYAL HORTICULTURAL SOCIETY. 
divide itself naturally into sub-*groups, though many of the species 
stand out clearly by individual characters — Selskianum by its dense 
hairiness, fioriferum by its much-branched stems, hyhridum by its 
Fig. 54. — Carpels of species of Aizoon section (the front one removed to show 
degree of attachment), a, S. Aizoon ; b, Ellacombianum ; c, kam- 
tschaticum ; d, fioriferum ; e, hyhridum ; f, Middendorffianum. All X 2. 
creeping stems and barren shoots. Aizoon and hyhridum vary greatly 
in some characters, and Middendorffianum has two distinct forms : 
this tends to render more difficult the separation of this closely allied 
group of species. 
36. Sedum Aizoon Linn. (figs. 54^, 55, 56). 
S. Aizoon Linn., "Species Plantarum," 430, 1753. Maximowicz in 
Bulletin Acad. Peiersbourg, 29, 143, 1883. Masters in Gard. 
Chron., 1878, ii. 267. 
Synonyms. — 5. Maximowiczii Regel, " Gartenflora," 1866, 353, tab. 528. 
Masters in Gard. Chron., 1878, ii. 268. 5. Woodwardii N. E. Brown in Kew 
Bulletin, 191 2, 390. 5. Selskianum of many gardens (not of Regel and Maack, 
see p. 112). S. Laggeri (du nomen nudum) of some gardens. 
Illustrations. — De CandoUe, " Plantes Grasses," tab. loi. Regel, " Garten- 
flora," tab. 528 (as Maximowiczii). 
An old garden plant, usually grown under the name Maximowiczii 
or Selskianum. (Other names under which the plant came to me are 
aizoideum, Alberli, asiaticum, euphorbioides, kamtschaticum, Laggeri, 
scabrum, and Wallichianum.) The only species with which it might 
be confounded is the true Selskianum, but the latter is hairy all over, 
and has narrower leaves and smaller flowers borne in larger numbers. 
5. Aizoon is unique among the well-marked group to which it belongs, 
in its thickened carrot-like tuberous roots, which resemble those which 
characterize the Telephium section ; these are well shown in a young 
plant, as figured (fig. 56). It is generally at once recognizable by 
its group of stout, erect, smooth stems a foot or more high, and dense 
flat C5^es of yellow flowers. 
Description. — A glabrous herbaceous perennial, quite leafless in winter, 
without barren shoots. Rootstock large, thick and knotted. Roots elongate, 
fleshy and tuberous. Stems arising in spring from the rootstock, several or many, 
erect, smooth, subangular, green, usually turning brown abruptly towards the 
base, unbranched or with axillary branches above, 1-1^ foot high. Leaves 
linear-lanceolate to ovate-lanceolate, alternate, 2-3 inches long, usually rather 
blunt, sharply toothed above, narrowing at base to a short stalk, green, midrib 
prominent on the paler underside. Inflorescence a dense terminal flattish leafy 
cyme 1^-3 inches across, of about 5 forked branches with flowers in the forks, 
leaves often forming a loose involucre. Buds ovate-oblong, often acute. Flowers 
