2l8 JOURNAL OF THE ROYAL HORTICULTURAL SOCIETY. 
{b) Herbs. 
(i) Leaves opposite or whorled. 
Eight of the cultivated Sedums fall in here, belonging either 
to N. America or E. Asia. The opposite-leaved S. rubroglaucum 
and S. divergens have many points of resemblance, and the three 
ternate-leaved species, 5. Chauveaudi, sarmentosum, and lineare, from 
the Far East, are allied. S. mexicanum is exceptional among the 
Seda Genuina in having many-leaved whorls. 
rubroglaucum Praeger Chauveaudi Hamet 
divergens S. Wats. sarmentosum Bunge 
Stahlii Solms lineare Thunberg 
Zentaro-Tashiroi Makino mexicanum Britton 
100. Sedum rubroglaucum Praeger (fig. 125). 
S. rubroglaucum Praeger in Journ. of Bot., 57, 51, 1919. 
A small plant of the type of S. spathulifolium Hooker ; its petals, 
connate in the lower part, class it with the group of species which 
Brixton places in a separate genus, Gormania. From any other 
species of that type in cultivation it may be known by its combination 
of the following characters : stem crimson, leaves glaucous with a 
depressed apiculus and a clasping petiole, flowers large (f inch across) , 
yellow, few, petals broad, connate in the lowest fourth. 
Description. — A small, dark-green, glaucous evergreen perennial; much flushed 
with crimson. Roots fibrous. Barren stems procumbent, bearing a loose rosette 
of leaves and emitting short, runner-like axillary shoots at first ascending and 
sparingly leafy, afterwards prostrate and naked save at the tips, where they pro- 
duce similar rosettes and eventually root ; stems crimson when young, black when 
old. Flowering stems erect, 2 inches high from the centre of the rosettes. Leaves 
mostly opposite, sometimes alternate, glaucous, extremely fleshy, shortly stalked, 
about f inch long, inch broad, -^^ inch thick ; lamina obovate, rounded at apex, 
with a short, depressed apiculus, flat or concave on face, the anterior edges sharply 
marked and meeting in the depressed apiculus, much rounded on back ; petiole 
short, widening into a clasping base, not spurred, broad, so that those of an 
opposite pair of ^ leaves meet or nearly so ; leaves of flowering stems similar but 
narrower. Inflorescence of few, rather drooping flowers, on pedicels nearly as 
long as the flowers. Buds ovate, blunt. Flowers f inch across, yellow. Sepals 
erect, very fleshy, free to the base, ovate, rather acute, green, nearly \ inch long. 
Petals twice the sepals, erect in lower part, spreading above, apiculate or blunt, 
ovate-oblong in upper half, cuneate in lower part, connate in the basal one-fourth, 
I inch long. Stamens equalling the petals, filaments green, anthers yellow. 
Scales much broader than long, yellowish. Carpels equalling the stamens, erect, 
long',''slender, green, tapering to very short styles. 
Flowers September (in 1916, but very possibly the normal flowering 
time is earlier). 
Habitat. — California : Short Trail, Yosemite Valley. 
This plant was sent fresh as gathered in June 191 5, by Professor 
H. M. Hall, labelled " Sedum obtusatum or yosemiiense," accompanied 
by S. yosemitense (from Ledge Trail in the same locality). It is quite 
different from yosemitense, which has green leaves without a clasping 
base, much smaller flowers, free lanceolate petals, &c. From those 
species of Gormania which have yellow flowers it is also easily dis- 
