ACCOUNT OF GENUS SEDUM AS FOUND IN CULTIVATION. 213 
Flowers April (cold frame) ; May-June (in the open). Hardy in 
all mild areas in the British Isles. 
Habitat, — Not certainly known, but undoubtedly Mexico. 
Described by Hemsley forty years ago from English garden specimens 
labelled 5. spathuli folium, and still found in English gardens. I 
have had it from nearly a dozen different sources, labelled confusum, 
dendroideum, or praealtum. Apparently not in cultivation in America, 
nor as yet re-collected in Mexico. 
It is the hardiest of the dendroideum group, and survived the 
severest Dublin winters which killed out S. praealtum almost entirely. 
A plant received from La Mortola as " sp. Mexico " is a large 
form, with longer branches, and leaves to 2 inches long and pro- 
portionately broad. In flower it is identical with the type. Otherwise 
I have seen no variation in the species. 
97. Sedum amecamecanum Praeger (fig. 122). 
S. amecamecanum Praeger in Journ. of BoL, 54, 44, 1917. 
A member of the sub-shrubby, flat-leaved section of Mexican 
Sedums, easily distinguished from the dendroideum group [dendroideum, 
praealtum, confusum) by its much smaller size and pale buff-yellow 
flowers ; and from the rest of the section by its oblanceolate (not 
spathulate) leaves, &c. 
Description. — A small, erect, glabrous, evergreen sub-shrub, 6 inches or more 
in height. Stem smooth, round, with wide-spreading branches, bare below, 
reddish, marked with small greyish leaf-scars. Leaves rather crowded, flat, . 
fleshy, green, patent or reflexed, sessile, with a very short truncate spur, oblanceo- 
late, bluntly pointed, f inch long by \ inch broad. Flowering shoots not different 
from the barren ones. Inflorescence terminal, rather dense, roundish, f to i inch 
in length and breadth, leafy, uppermost bracts resembling the sepals. Buds 
lanceolate to oblong, blunt, ribbed. Flowers f inch across, of a palish buff- 
yellow. Sepals unequal, blunt, linear or club-shaped, very fleshy, green, wide- 
spreading, shortly spurred, separate to the base. Petals broadly lanceolate, 
wide-spreading, acute, \ longer than the longest sepal. Stamens yellow, 
spreading, f the petals. Scales short, squarish, emarginate, deep orange above 
with a whitish base. Carpels erect, tapering, equalling the stamens, greenish 
yellow, styles slender, slightly spreading, orange-yellow. 
Flowers May (cold frame). Not hardy at Dublin, but hardy at 
Rostrevor, a very mild spot. 
Habitat. — Amecameca, Mexico. 
Sent to Wisley from Washington unnamed under the number 
having been collected by C. A. Purpus in 1906 (No. 108). 
98. Sedum pachyphyllum Rose (fig. 123). 
S. pachyphyllum Rose in "Contrib. U.S. Nat. Herb.," 13, 299, 1911. 
Illustration. — Loc. cit., pi. 58 (photo). 
A large, very thick-leaved Sedum most resembling S. allanioides 
and to a less degree 5. Treleasei ; from the latter it can be at once 
separated by its terete, not fiat, leaves. In flower, its dense, flattish 
