209 
an essential oil, which renders them tonic and antispasmodic ; such are Cheno- 
podium ambrosioides and botrys. Chenopodium Quinoa is a common article 
of food in Peru. But the most important of their qualities is the production 
of soda, which is yielded in immense quantities by the Salsolas, Salicornias, and 
others. The essential oil of Chenopodium anthelminticum, known in North 
America under the name of Worm-seed Oil, is powerfully anthelmintic. Bar- 
ton, 2. 187. The seeds of Atriplex hortensis are said to be so unwholesome 
as to excite vomiting. Chevallier has remarked the singular fact, that Che- 
nopodium vulvaria exhales pure ammonia during its whole existence. This is 
the only observation upon record of a gaseous exhalation of azote by perfect 
vegetables ; and the facility with which this principle is abandoned by ammo- 
nia may perhaps explain the presence of azotic products in the vegetable 
kingdom. Ann. des Sc. Nat. 1. 444. 
Salicornia, L. * 
Halocnemon, M. Bieb. 
Caroxylon, Thunb. 
Anabasis, L. 
Brachylepis, Meyer. 
Cyclolepis, M. Tand. 
Villemetia, Merckl. 
Bassia, All. 
Salsola, L. 
Nanophyton, Less. 
Halimocnemis, Meyer. 
Halogeton, Meyer. 
Schanginia, Meyer. 
Schoberia, Meyer. 
Suaeda, Forsk. 
Lerchia, Hall. 
GENERA. 
Cochliospermum, Krascheninnikovia, 
Lga. Giildenst. 
Kochia, Roth. Eurotia, Adans. 
Chenolea, L. 
Anisacantha, R. Br. 
Sclerolsena, R. Br. 
Cornulaca, DC. 
Traganum, DC. 
Hemichroa, R. Br. 
Polycnemum, L. 
Camphorosma, L. 
Threlkeldia, R. Br. 
Corispermum, L. 
Ceratocarpus, L. 
Diotis, Schreb. 
Ceratospermum, P( 
Crucita, Loeffl. 
Spinacia, L. 
Beta, L. 
Acnida, L. 
Axyris, L. 
Halimus, Rchb. 
Oligandra, Less. 
Atriplex, L. 
Obione, Gaertn. 
Blitum, L. 
Rhagodia, R. Br. 
Enchylaena, R.Br. 
Monolepis, Schr. 
Galenia, L. 
Chenopodium, L. 
Teloxys, M. Tand. 
Agathophytum, 
M. Tand. 
Roubieva, M. Tand. 
Acroglochin, Schrad. 
Blitanthus, Rchb. 
Lecanocarpus, Nees. 
Anredera, Juss. 
Hablizia, M. Bieb. 
Boussingaultia, 
H. B. K. 
Basella, L. 
Dysphania, R. Br. 
See the rudiments of an arrangement of this order into §, in Ledebour^s 
FI. Altaica, 1. 370; B,nd hy MoquinTandon in Ann. Sc. n. Ser. 4. 209 (1835) ; 
neither is sufficiently extensive to be adopted here. 
Order CLVL* TETRAGONIACE./E. 
Affinities. I have already excluded from Ficoidese or Mesembryaceae 
all the apetalous genera usually referred to that order, considering that the 
tendency to produce petals is in that case of too powerful a nature to admit of 
exception. The apetalous genera formerly included among Mesembryaceae 
are in fact so very much the same as Chenopodiaceae, that I know of no cha- 
racter to distinguish them except their ovary being formed of several carpels. 
Tliey, therefore, bear the same relation to Chenopodiaceae as Datiscaceae to 
Urticaceae. 
GENERA. 
Tetragonia, L. Aizoon, L. Miltus, Lour. 
Sesuvium, L. Veslingia, Fabr. 
P 
