(J. laevigata.) 
BRITISH J UNGERM ANNLffi. 
by smaller leaves, or such as are decayed, as may be seen in f. 1 and 2. They are every 
where bifarious, closely imbricated over the upper side of the stem, and placed 
alternately, with great regularity and exactness ; divided into two very unequal con- 
duplicate lobes, of which the upper one is much the largest, convex on the upper 
surface, more or less smooth, and even glossy, of an ovate figure approaching to round, 
with its margin sometimes entile, but more frequently spinuloso-dentate, the teeth 
being of very unequal sizes, placed at distant but uncertain intervals, and generally 
incurved; the inferior division or lobe is scarcely one-third so large as the superior, 
to the under side of which it is closely appressed in a direction oblique with regard to 
the stem, its form is oblong or ligulate, its margins every where dentato-spinulose, with 
the teeth occasionally recurved The cellules are very small, roundish ; the color a dark 
olive-green, sometimes inclining to a vcllow-brown. 
There is one Stipule (f. 5) to each pair of leaves, oblongo-quadrate, and, equally with the 
lesser lobes of the leaf, which it exactly resembles in size and shape, spinuloso-dentate 
at the margin, having its teeth in like manner now and then recurved. 
Dr. Schrader appears to be the first botanist who detected this species, and published it as 
distinct from J. platyphylla, to which I must confess it bears so close an affinity (and especially 
to the var. Thuja) in every thing, but the spinuloso-dentate margins of the lesser lobes of the 
leaves and of the stipules, that 1 cannot help offering it as my opinion that future discoveries 
may prove it to be a variety, though a very strikingly marked one. At the same time I must 
observe that, in all the specimens I have examined of J. platyphylla, I have never found the 
stipules and smaller lobes of the leaves to be otherwise than quite entire at the margins. The 
difference in size and in the smoothness of surface, mentioned by Schrader, will not hold good, 
the same being found often to exist in an equal degree in J. platyphylla. 
Dr. Roth has done no more than copy the description of Schrader, and add synonyms from 
Micheli and Dillenius, which appear to me rather to belong to the J. Thuja of Dickson, so that 
no new light is thrown on the matter in his work. Lamarck also describes a plant under the 
name,,/. laevigata, in his Flore Francoise, and cites Schrader’s as a synonym; but his words are 
at variance with such a reference, so that, though I have thought it best to quote him above, I 
have done it with doubt, and I fear it must be admitted, from his description, that his J. Icevigata 
is, in reality, a totally different species; “ Les feuilles,” to use his words, “sont nombreuses, 
serrees, embriquees, larges, courtes, tics obtuses, presque tronquees, surmontees d’une petite 
pointe acer^e, entities sur leurs bords, depourvues de nervures et de stipules, disposees sur deux 
rangs d’une maniere peu prononcec.” 
1'lie fructification, which I have never yet seen, was also unknown to Schrader and Roth. 
