CRUCIFERAE 67 
species, then, want a dry, hot crevice—at least in such a 
climate as mine—and are supposed to have a love of 
limestone, though I have never found them exacting as 
to soil. And if they grow too straggly, or have dead- 
looking boughs, the whole plant should be snipped hard 
back, like a Box, and then it will make a neat mass again. 
The Wall-flowers have given me a great deal of dis- 
appointment. Hrysimum pachycarpum I liked, and its 
deep orange flowers rejoiced me. But then it turned out 
either miffy or biennial or both, so that I think I no 
longer possess it. Ochrolewcwm—whose synonyms are 
lanceolatum and Cheiranthus —I got seed of, which 
germinated so freely that now it is the burden of my 
life. It makes a good border-edging plant, with hard 
cutting, as it forms neat lumps of a bright darkling 
green, with thousands of fragrant large lemon-yellow 
flowers. But it is too rank for the choice rock-garden. 
Then, fired by a most wonderful coppery-orange illustra- 
tion, I imported Erysimum comatum from Servia at vast 
expense. The habit of the plants, very long, narrow 
leaves in a fine rosette, is lovely, but those flowers that 
should have been so brilliant, turned out ragged in shape 
and substance, and of a pale quite uninteresting citron 
yellow. However, the plant is as robust as such undesir- 
able aliens frequently are. Of the dwarfs Erysimum 
pumilum and Erysimum petrowskianum, I have a better 
tale: they are very wee, delicate, and pretty, well worth 
a little extra trouble in the way of a choice corner. 
Purpureum, too, is a real gem to do with—quite small, 
with large flowers of a soft, sad purple, attractive and 
effective. As for T'chihatchewia isatidea, which Mr. Robin- 
son’s (or M. Leichtlin’s) flaming tale sent all the world in 
quest of, I greatly fear he praised it prematurely: it proves 
a shocking miff and mimp, querulous, monocarpous, and 
no prettier than Jberidella. 
