ACCOUNT OF GENUS SEDUM AS FOUND IN CULTIVATION. 117 



name minor to the narrow-leaved form ; but it appears better that 

 the form which Maximowicz mentions first (which is also that to which 

 Middendorff's own specimens belong, and which is much the com- 

 moner in cultivation) should be taken as the type, and it is the plant 

 of my description. The other form is described separately below. 



Description. — A glabrous tufted perennial, without barren stems. The 

 stems die down in autumn : next year's stems arise in late summer from near 

 the base of these, remain short and leafy during the winter, shoot up, flower and 

 die during the succeeding season. Rootstock thick, much branched upwards. 

 Stems many, 6-12 inches, erect, round, smooth, slender, unbranched, leafy. 

 Leaves numerous, alternate, spreading, narrow, concave, nearly linear, about 

 \\ inch long by ^ inch broad, sessile, fleshy, with several small teeth near the 

 apex, entire in the lower two- thirds. Inflorescence a leafy flat-topped umbellate 

 cyme, of several (usually 4) forked branches with flowers in the forks, about 

 I inch across. Bracts leaf-like, the uppermost entire. Buds ovate, acute, ribbed. 

 Flowers yellow, f inch across, the lowest shortly pedicelled. the rest sessile. 

 Sepals green, spreading in bud ; obtuse, linear and terete in upper part ; widening 

 below to a broadish base. Petals bright yellow, ij times to twice the sepals, 

 lanceolate, acute, keeled, wide-spreading. Stamens f the petals, filaments 

 yellow, anthers orange. Scales very short, whitish. Carpels greenish-yellow, 

 erect, becoming red and stellate in fruit. Whole plant turning red in fading. 



Flowers July- August. Hardy. 



Habitat. — East Siberia, Northern Manchuria. 



A distinct and pleasing little plant, most resembling S. hyhridum, 

 but with more or less erect stems densely clothed with narrower leaves, 

 and without creeping, barren shoots. 



Rare in cultivation. I have received it from the late Canon 

 Ellacombe, Messrs. Backhouse of York, and Cunningham Eraser & 

 Co. of Edinburgh, and from Petrograd. 



Named in honour of A. T. von Middendorff, whose travels in 

 Northern Siberia in 1843-4 first made known many of the plants of 

 that region. 



Var. diffusum var nov.* (fig. 59, h). 



Description. — Stems longer than in the type, more or less decumbent, 

 tending to root at the base. Leaves larger, lanceolate to linear-spatbulate, 1-2 

 inches long, by \ inch broad, sharply toothed in upper part, teeth up to \ inch 

 deep, inflorescence lax, 2-3 inches across. 



39. Sedum Ellacombianum Praeger (figs. 546, 60, 61). 



5. Ellacombianum Praeger in Journ. of Boi., 54, 41, 1917. 



A distinct species, widely spread in cultivation, but till recently 

 undescribed, having been confused with Aizoon, Selskianum, kam- 

 tschaiicum, and hyhridum. It is far removed from the second and fourth 

 of these — Selskianum being tall, hairy, narrow-leaved and smaller- 

 flowered, and hyhridum standing apart from all the rest of the Aizoon 

 section in its creeping habit. 5. Ellacomhianum is nearly related to 



* Caulis quam in typo longior plus-minus decumbens, nonnunquam basi 

 radicans. Folia majora, lanceolata vel lineari-spathulata, 2-5-5 ^ni. longa, 6 mm. 

 lata, in parte superiore acutidentata, dentes ad 3 mm. longi ; inflorescentia laxa, 

 5-8 cm. lata. 



