ERYSIMUM. 
others to supply a full collection). For in the high dry open places, 
between 8000 and 11,000 feet up in the Sierra Nevada of the Old 
World, dwells #. glaciale, the neatest, finest, and most unfriendly of 
little thorny tuffets, armed in copious spikes of silvery grey, deepening 
towards shades of blue, with fish-bone spines of ivory glinting as its 
stems of 3 or 4 inches unfold towards the frill and the flower. This, 
indeed, is thankful for open very deep soil in the fullest sun and with 
perfect drainage, where it grows on happily into a clump, and may be 
raised from seed, having, like all its kind, a root so heroic and profound 
as utterly to discourage division or removal. It blooms in summer. 
Erysimum, a most valuable race of Cruciferous beauties from the 
Old and the New World alike, which have by now absorbed almost all 
the more worthy species that used to shelter under Cheiranthus. In 
constitution these are all quite good, but sometimes have the im- 
permanence with which pious Cruciferae (if beautiful) have a special 
way of reminding us that the good things of the world are specially 
transitory. (Bad Cruciferae, on the contrary, make a pride of being as 
eternal as sin or folly.) They should all, then, have a perfectly well- 
drained crevice or comfortable moraine, in full sun; and all, to make 
sure of them, should annually be multiplied, either by their abundant 
seed or by cuttings. Their blooming time is early summer. 
E. aciphyllum makes a tuft of long, stiff, almost pungent grey 
leaves in a dense clustered tuft, sticking up and out on all sides like 
those of some miniature Agave. Up rises then in the midst an almost 
bare stem, carrying yellow flowers of medium size. (Cadmus in Caria, 
Tmolos, &c.) LH. leptophyllum differs only 1 in its hairs, which are simple, 
and not, as here, split each into four. 
E. Alcon 0. Perowskianum. 
E. alpestre has also medium-sized flowers, and is a densely leafy 
tuft of 4 or 5 inches. 
EH. amoenum. See under £. Wheeler:. 
E. Aucheri (EH. pulvinatum, Gay), creeps about among the high- 
alpine screes of Northern Persia, there forming neat mats of hoary 
cushions with the grey rosettes that emerge from the end of each 
sublapidary runner. The flowers are in heads of three or six, of 
medium size. 
H. australe (Gay)= LE. longifolium, q.v. 
E. Bocconii grows from 8 inches to 2 feet high on the hills of 
Portugal, and has large yellow flowers. 
E. boryanum is also Cheiranthus Parnassi, a grey-hoary tuft from 
which spring a number of gracious almost undividing stems, with 
loose spires of pale-yellow blossom, variable in colour and size. 
348 
