APPENDIX. No. V. 425 
Il. The NATURAL ORDERS of which the herbarium from Congo 
consists, are 87 in number; besides a very few genera not referable to any 
families yet established. More than half the species, however, belong to nme 
orders, namely, to Filices, Graminew, Cyperacew, Convolvulucee, Rubiracee, 
Composite, Malvacea, Leguminose, and Euphorbiacee ; all of which have 
their greatest number of species in the lower latitudes, and several within the 
tropics. 
I now proceed to make some observations on the orders above enumerated, 
and on such of the other families, included im the collection, as present any 
thing remarkable, either in their geographical distribution, or in their struc- 
ture; more especially where the latter establishes or suggests new affinities ; 
and I shall take them nearly in the same order, as that followed in the 
botanical appendix to Captain Flinders’s Voyage. 
ANONACEE. Only three species of this family are contained in the col- 
lection. One of these is Anona senegalensis, of which the genus has been 
considered doubtful even by M. Dunal in his late valuable Monograph of the 
order.* That it really belongs to Anona, however, appears from the specimen 
_ with ripe fruit preserved in the collection. It is remarkable therefore as the 
only species of this genus yet known which is not a native of equinoctial 
America: for Anona asiatica, of which Linnaeus had no specimen in his her- 
barium, when he first proposed it under this name, according to the original 
synonyms, is nothing more than Anona muricata: and A. obtusiflora, supposed 
by M. Tussac+ to have been introduced into the American Islands from Asia, 
does not appear to differ from A, mucosa of Jacquin, which is known to be a 
native of Martinica. 
The second plant of this order in the eollection is very nearly related to 
Piper Asthiopicum of the shops, the Unona ethiopica, and perhaps also 
Unona aromatica of Dunal :} these with several other plants already published, 
form a genus, which, like Anona, is common to America and Africa, but of 
which no species has yet been observed in Asia. 
Of MALPIGHTACE, an order chiefly belonging to equinoctial 
America, there are also three species from Congo. 
* Monogr. de la famille des Anonacées, p. 16. 
+ Flore des Anlilles, 1. p. 193. + Anonac. p. 113 et 112. 
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