1870.] HARDY HERBACEOUS PLANTS. 515 



toothed, dark-green flat leaves. The flowering stems ascend a little, 

 terminating in a corymb of deep-yellow flowers, which appear in July 

 and August. Native of Kamtschatka. A very good border species, 

 and handsome also on rockwork. Height, 6 to 9 inches. 



S. op posit i folium — Opposite-leaved Stonecrop. — This species grows 

 only a few inches high. Like the last, it has prostrate barren shoots 

 clothed with opposite wedge-shaped leaves, flat and toothed. The flowers 

 are in corymbs, are dull white, and appear in summer and autumn. 

 Native of the Caucasus. A useful border species. 



S. popidi folium — Poplar-leaved Stonecrop. — This is one of the most 

 distinct, though not the most beautiful, of the group. It assumes rather 

 a shrubby habit, about 1 foot high. The leaves are flat, heart-shaped, 

 toothed, and supported on stalks that are lengthy for a Sedum. The 

 flowers are in terminal corymbs, and dull white, with purplish carpels 

 and pistils. Flowers in July and August. Native of Siberia. 



S. Rhodiola, syn. Rhodiola rosea — Rose-root Stonecrop. — This is a well- 

 known old-fashioned border plant, common in many cottage-gardens 

 in the country. It is not highly ornamental, but has a good deal of 

 distinctiveness about it. The stems are leafy, stout, and erect, about 

 a foot high. The leaves are oblong, toothed, and slightly glaucous. The 

 flowers are in terminal close corymbs, and each flower contains only 

 one sex, either male or female ; and in colour they are in different indi- 

 viduals either yellow or purplish, the former in nature being the most 

 prevalent. Native of the mountains of Britain, and the mountainous 

 countries of Europe and Asia. 



8. rupestre — Rock Stonecrop. — This is a dwarf creeping species, form- 

 ing lowly masses of barren stems, and branches clothed with awl-shaped 

 cylindrical leaves, more or less glaucous in hue. The flowers are in 

 terminal cymes, composed of several recurved branches, and bright 

 yellow, appearing in July and August. Native of Britain and vari- 

 ous countries of Europe. Two slightly-differing varieties are circu- 

 lated in gardens as species under the names reflexum and Forsteri- 

 anum, but they are not desirable in any good collection together. 



S. sempervivoides — Houseleck-lilce Stonecrop. — This species differs 

 from all the preceding. The leaves are thick and succulent, egg-shaped, 

 with an abrupt sharp point, and somewhat hairy above and below, 

 and arranged in close compressed rosettes. The flowers, in terminal 

 corymbs on erect stems, are dark purple, appearing in July and August. 

 Height from 9 inches to 1 foot. Native of Iberia. 



S. sexangulare — Six-angled Stonecrop. — This is near in aspect to 

 S. acre, but is quite distinct. It has the same close mat-like growth, but 

 the leaves are longer, narrower, and darker green. The flowers are 

 bright yellow, in the manner of those of acre, but begin to open as 



