64 



CRUCIFER^. [Erysimum. 



Schlechtendal should be referred liither, as I rather suspect, I do not possess sufficient materials to decide : — 

 it is said to have a biennial root. ■ ^ 



Tab, XXI. Plunt :— natural size. Fig. 1, Flower; Jig, 2, Petal; fig, 3, Stamen; fig. 4, Pod; fig, 5, 

 Seed ; fig. C, Embryo ; fig. 7, Section of the seed -.—magnified. 



i 



20. ERYSIMUM. Linn. 



Siliqjia tetragona. Calyx clausus. Cotyledones planae, oblongae. DC, 



* Erjsimastrum. Stylus hrevis vix ullus. Siliqua tetragona. Calyx deciduus. Folia nee 



cordattty nee amplexieaulia, Flores distiricfe pedicellati, 



1. E, ekeiranthoides ; scabriusculum, pube minutissima tripartita, foliis lanceolatis siib- 

 clenticulatis viridibus, siliquis erecto-patulis pedicello duplo longioribus, stigmate parvo. 

 Linn, Sp, PL p, 923, Jax:^q, Austr, v. L ^ 23, Pursk^ FL Am, v\ 2, p, 436. De Cand, 

 Prodr, V, 1. p, 198. Rich, in Frankl. \st Journ, ed. 2. p. 27, 



/3. ramis elongatis folia multo minora gerentibus. 



5. caulibus simplicibus. 



Hab. Throughout Canada, and in all thfi plains westward of the Rocky Mountains, to lat. 67° on the 

 Mackenzie. North-West Coast, lat. 47^, 48^. Douglas. Scouler. — This plant is liable to much variation 

 in its general appearance, depcndiiig probably mainly on age and situation. The first j;ear's plant, for it ap- 

 pears to be biennial, would seem to have quite simple stems. In the more usual state, it is much branched, 

 the branches rather short, and bearing" leaves not much smaller than those of the stem: whereas, in my var. 

 /3., the branches are virgate, and clothed with small narrow leaves. 



2. E, lanceolatum; pube bipartita appressa ubique incanum asperunij caule subsimplici, 

 foliis lineari-lanceolatis inferioribus plerumque dentatis, unguibus calyce longioribus, sili- 

 quis longis erectis, stigmate emarglnato. — Br, in Hort. Kew, ed, 2. v. 4. p, 116. De Cand, 

 Prodr, V. 1. p, 199, Cham, et Schleclit, in LinncBa, v, 1. p. 29. — Chciranthus erysimoides. 

 Linn. — Jacq. Austr, v, 1. t, 74. — an E. virgatum? Iloth. — De Cand, 



Hab. From Canada to the shores of the Arctic Sea, and to the Pacific. — This entirely agrees with my 



Europaean specimens of E. lanceolatum, and also with the figure above quoted in Jacquin ; but the leaves 



are not generally so hoary, nor are the flowers quite so large. Its narrow, more pubescent leaves, shorter 



. pods, and large flowers distinguish this from the simple stemmed varieties of the preceding ; its smaller flowers, 



less hoary foliage, and upright and shorter pods from the following. Cotyledons certainly inciunbent. 



3. E, (potius Cheiranthus) asperum; pube bipartita appressa ubique incanum asperum, 

 caule simplici, foliis lineari-lanceolatis integris, radicalibus runcinato-dentatis, unguibus 

 calyce longioribus, siliquis longis patentibus, stigmate bilobo. (Tab. XXIL) — De Cand, 

 Prodr, V, 1. p. 199. — Cheiranthus asper. Nutt. Gen, Am. v. 2. p, 69. (non Cham,) Torrey 

 in PL ofR. M. Ann. of Lye. ofN. Y, p. 166, 



■ r 



Hab. About Carlton House on the Saskatchawan, lat. 65°. I>r. Richardson. Barren grounds of the 

 Columbia, from the Great Falls upwards. Douglas. — This is a very handsome species, with flowers, as Mr, 

 Nuttall observes, of a bright yellow colour, resembling those of Cheiranthus C/ieiri, and almost equally fra- 

 grant. The pods are three inches long, patent, wavy before they are quite ripe. The great size of the 

 petals, and longer and spreading pods distinguish this from E. lanceolattimj to which, in other respects, it is 

 very similar. It seems to have been originally detected by Mr. Bradbury on the banks of the Missouri, at a 

 distance of 1100 miles from its mouth. — I possess that traveller's original specimens, named by Mr. Nuttall, 



