142 PLANTS OF CHINA. 
from the surface of a mature one. They varied in length from two lines 
to an inch, and followed no symmetrical arrangement, but sprang indis- 
criminately from the costa, primary veins, and connecting parenchyma, 
and threw out fibrils which emerged from the under side of the leaf. 
Amongst the various instances on record of the presence of adven- 
titious buds on the leaves, nearly all, as in the well-known example of 
Bryophyllum, where the phenomenon is normal, agree in the fact that 
they are produced from the margin. The case recorded by Poiteau 
and Turpin of Ornithogalum thyrsoides, and especially that of the Dro- 
sera, observed by M. Naudin, (vide Moquin Tandon, Térat. vég. p. 237, 
and St. Hilaire, Lecons de bot. p. 222), closely resemble the present 
one, which, however, I think it will be admitted, is far more remark- 
able, by the abundance and well-developed state of the adventitious 
leaves. The leaf from which they sprang was partly discolored, and in 
an incipient state of decay, particularly the under surface, from con- 
stant exposure to wet; the plant growing only in rocky ravines, down 
which water is incessantly falling in cascades. I have considered the 
present example worthy of publication, not only as being one of the 
most remarkable of the kind hitherto recorded, but also because I think 
it caleulated to support in some measure the opinion of those who con- 
tend for different modes of placentation. The placente of the group 
to which the plant under consideration belongs, arise from the axils 
of the carpels, but (see Brown in Horsfield, Plant. Jav. rar. pt. ii) 
dividing into two lobes, the ends of which are recurved. But while 
the marginal theory would appear to be untenable as universal, the 
same must probably be said of those propounded by Endlicher and 
Link (Vide Reports on Botany, Ray Society, 1846, p. 378). The 
Orders Geraniacee, Nympheacee, Fabacee, and Orchidacee, seem, in- 
deed, to present so many distinct modes of placentation ; and I trust that 
the actual example may tend to strengthen the views of those whe are 
inclined to admit diversity in the local origin of ovules, in like manner 
as they are compelled to accord it to buds. A representation of the 
irregularity is annexed. . (Vide Plate V. C.) 
2. Description of a new Genus of AcaNTRACEOUS plants of China; by 
H. F. Haxcz, Es 
> GUTZLAFFIA, Hance. 
Calyx regularis, quinquefidus, laciniis angustis. Corolla e tubo 
