146 JOURNAL OF THE ROYAL HORTICULTURAL SOCIETY. 
The anomalies displayed by the Mexican representatives of the 
section have already been discussed on p. 24. It seems best to widen 
the definition of Koch to include the sub-shrubs so characteristic 
of the Mexican Sedum-flora. 
Included in the Seda Genuina are also the yellow-flowered Japonica 
series of Maximowicz from China and Japan (of which 5S. Celiac 
Hamet, japonicum Siebold, lineare Thunberg, muUicaule Wallich, 
sarmenlosum Bunge, Chauveaudi Hamet, trullipetalum H. f. and T., 
variicolor Praeger, Zeniaro-Tashiroi Makino, are in cultivation), the 
ovoid-leaved S. nudum and 5. lancerottense from the Atlantic Islands, 
and the peculiar white-flowered S. Chaneti from China. 
General Arrangement of the Seda Genuina. 
A. Flowers white. 
{a) Sub-shrubs. 
populifolium, reiusum, Adolphi, frutescens, allantoides, 
Bourgaei, guadalajaranum, griseum. 
{b) Herbs. 
(1) Leaves flat : ternatum, Nevii, adenotrichum, Chaneti, 
alsinefolium, magellense, monregalense, moranense, 
Liebmannianum, compadum. 
(2) Leaves terete or sub-terete : dasyphyllum, brevifolium, 
anglicum, album, gypsicolum, hirsuium, Lydium, 
gracile, Alberti. 
B. Flowers red or purple. 
{a) Sub-shrub. 
oxypelalum. 
{b) Herbs. 
(1) Leaves flat : spurium, stoloniferum, proponiictim, 
Stevenianum, rhodocarpum, longipes. 
(2) Leaves terete : pulchellum. 
C. Flowers yellow. 
[a) Sub-shrubs. 
nutans, praealtum, dendroideum, confusum, amecamecanum, 
pachyphyllum, Treleasei. 
{b) Herbs. 
(1) Leaves opposite or whorled : rubroglaucum, divergens^ 
Siahlii, Zentaro-Tashiroi, Chauveaudi, sarmenlosum, 
lineare, mexicanum. 
(2) Leaves alternate. 
(i.) Leaves spathulate, flat : Palmeri, compressum, 
variicolor, spathulifolium, yosemitense, Hallii, oreganum. 
(ii.) Leaves not broadest^ above (ovate to linear) : 
humifusum, cupressoides, acre, Siribrnyi, oaxacanum, 
nudum, lancerottense, japonicum, alpestre, Douglasii, 
multicaule, trullipetalum, Celiae, multiceps, sexangulare, 
rupestre, reflexum, altissimum, anopetalum, steno- 
petalum, pruinatum, amplexicaule. 
