ACCOUNT OF GENUS SEDUM AS FOUND IN CULTIVATION. 147 



A. Flowers White. 

 {a) Sub-shrubs. 



Except for the Siberian 5. pofulifolium, which stands quite apart 

 as regards growth-form from all other Eurasian Sedums, the species 

 grouped here are Mexican ; of these, Bourgaei, guadalajaranum and 

 griseutn are closely allied to each other. 



The following white-flowered sub-shrubby species are in cultivation. 



populifolium Pallas allantoides Rose 



retusum Hemsley Bourgaei Hemsley 



Adolphi Hamet guadalajaranum S. Wats. 



frutescens Rose griseum Praeger 



58. Sedum populifolium Pallas (fig. 78). 



5. populifolium Pallas, Reise, 3, 730, tab. O, fig. i, 1776. Masters in 

 Card. Chron., 1878, ii. 463. 



Illustrations. — Pallas, loc. cit. De CandoUe, " Plantes Grasses," tab. no. 

 Bot. Mag., tab. 211. Revue Horticole, 1857, 150, fig. 6. 



A most distinct species, standing quite apart in its slender, bushy 

 growth and long-stemmed poplar-like leaves, which fall in autumn. 



Description. — A deciduous, glabrous sub-shrub, i-ij foot high. Roots 

 fibrous. Stem erect, slender, woody, much branched, with thin, smooth, dark 

 purple bark. Leaves alternate, green, flat, fleshy, stalked ; petiole slender, f inch 

 long ; lamina ovate, cordate, acute, | inch long, coarsely and irregularly toothed 

 throughout. Inflorescences lax, of terminal, much branched, corymbose cjnnes. 

 Buds ovoid, blunt, tipped pink. Flowers pale pink or white, J to | inch across, 

 smelling of hawthorn. Sepals green, deltoid, J the petals. Petals spreading, 

 lanceolate, acute. Stamens slightly exceeding the petals, filaments pinkish, 

 anthers red-purple. Scales white, quadrate, rather longer than broad. Carpels 

 white, erect, shorter than the stamens. 



Flowers August. 



Habitat. — Siberia. 



Long known in gardens, and deservedly a favourite. It is one 

 of the very few Sedums which have scented flowers, possessing as 

 it does a strong odour of hawthorn. No varieties are recorded. The 

 flowers vary in colour from white to pale pink, and a form received 

 from the Lissadell Nursery, Co. SUgo, has the leaves much less toothed 

 than usual (fig. 78, separate leaf). Appropriately named populi- 

 Jolium — poplar-leaved. 



59. Sedum retusum Hemsley (fig. 79). 



S. retusum Hemsley, " Diagnoses Plant. Nov.," 3, 51, 1880. Hemsley, 

 " Biol. Centr. Amer.. Bot.," 1, 398. " N. Amer. Flora," 22, 68. 



A distinct, erect sub-shrub a foot or so high, easily known by its 

 spathulate leaves deeply notched at the top (but occasionally the 

 notch is absent) and its white flowers with a red eye. 5. oxypetalum 

 sometimes bears similar notched leaves, but it is a much larger plant 

 with star-like dull-red flowers, while those of S. retusum are rather 

 bell-shaped and have blunt petals. 



