236 REVISION OF THE NATURAL ORDER HEDERACE. 
nately has never been completed, only nineteen genera being treated 
up It is merely a sketch, written for a gardening paper, but 
nevertheless the most important ever brought out on the subject. The 
- learned authors there pointed out the importance of the articulation of 
the pedicels, the calyculus, the zestivation, and the albumen. The new 
genera indieated were found, in most instances, to be so natural, and 
coincide so well with the geographical distribution, that most of them 
have been generally adopted, though they have, as yet, not been de- 
scribed. They were eight in number (viz. Stylbocarpa, Echinopanaz, 
Fatsia, Brassaiopsis, Dendropanaz, Oreopanax, Didymopanax, and 
Cuphocarpus), two of which, Cuphocarpus, with its unicellular ovary, 
and Stylbocarpa, on account of its quincuncial petals, must be excluded 
from the Order. 
In 1856, Miquel published in the ‘Bonplandia’ a paper on the 
Araliacee of the Indian Archipelago, in which he establishes five new 
genera (viz. Agalma, Eupteron, Aralidium, Macropanaz, and Notho- 
panax); and in a subsequent, though antedated publication, his ‘ Flora 
of Dutch India,’ and its supplement, he adds to them Actinomorphe 
and Parapanaz. Of these Aralidium, with its 1-celled ovary, will have 
to be transferred to Cornacee. In the same year (1856) Hooker fil. 
and Thomson established the genus Tupidanthus; in 1858, Grisebach, 
(Bonplandia) the genus Sciadodendron ; and in 1859, Maximowicz, the 
genus Eleutherococcus. 
In 1859, Carl Koch gave, in his * Wochenschrift für Gärtnerei und 
Pflanzenkunde, an enumeration of the garden Araliacee known to 
him, and a review of the labours of those gone before him in this 
field of inquiry. "Though overlooking a few, he enumerates thirty-four 
genera, of which seven (Aralidium, Arthrophyllum, Cuphocarpus, Panaz, 
Aralia, Pukateria, and Bursinopetalum) are not recognized by me as 
Hederacee. He proposes two new genera (Pseudopanax and Tetra- 
panaz). 
In 1863 I pointed out, in the ‘ Journal of Botany,’ that Horsfieldia, 
Hydrocotyle, and several other genera hitherto placed in Umbellifere 
must be referred to Hederacee, on account of their truly valvate pe- 
tals; and in 1864 I added Crithmum to the list. 
In the following papers I shall review the genera in such groups as 
may be best calculated to show their respective limits, illustrating 
them xylographically by magnified figures, When the whole Order 
