212 
dicine by Hindoo practitioners, to ease the pain of griping in the colic. Ains- 
lie, 2. 2. The leaves of P. hispidum are said by Humboldt to be substituted, 
in South America, for Tobacco, N. G. andSp. 2. 178. 
GENERA. 
§ 1. PoLYGONE^jBent 
Koenigia, L. 
Rumex, L. 
Acetosa, Moench. 
Lapathum, Moench. 
Centropodium, 
Burch. (29) 
Emex, Neck. 
Vibo, Moench. 
Oxyria, Hill. 
Rheum, L. 
Podopterus, PI.B. 
Triplaris, Ij. 
Blochmannia, Weig. 
Coccoloba, L. 
Briinnichia, Banks. 
Rajana, Walt. 
Atraphaxis, L. 
Antinoron, Raf. 
Polygonella, Mich. 
Tragopyrum, M. Bieb. 
Ceratogonum, Meisn. 
Polygonum, L. 
Fagopyrum, Gaertn. 
Calliphysa, F. et M. 
Calligonum, L. 
Pallasia, L. 
Pterococcus, Pall. 
Oxygonum, Burch. 
(30) 
Espinosa, Lag. 
§ 2. Eriogone.e, 
Benth. 
Eriogonum, Michx. 
Chorizanthe, R. Br. 
Mucronea, Benth. 
Alliance III. PETIVERIALES. 
Essential Character. Albumen absent. Cotyledons spiral. 
Order CLIX. PETIVERIACE.^. 
PETIVERIE.E, Agardh Classes, (1825). — Petiveriace^, Link Handb. 1. 392. (1829). 
Essential Character. — Calyx of several distinct leaves. Stamens perigynous, either 
indefinite, or, if equal to the segments of the calyx, alternate with them. Ovary superior, 
1 -celled; styles 3 or more; stigma lateral; ovule erect. Fruit 1 -celled, indehiscent, dry. 
Seed erect, without albumen ; embryo straight ; cotyledons convolute ; radicle inferior. — 
Under -shrijibs or herbaceous plants, with an alliaceous odour. Leaves alternate, entire, with 
distinct stipules, often with minute pellucid dots. Flowers racemose. 
Affinities. Obviously akin both to Phytolaccacese and Polygonacese, with 
the former of which Brown combines them. They are, however, distinguished 
from Phytolaccacese by the presence of stipules, and by their straight embryo 
destitute of albumen, and spiral cotyledons. From Polygonacese they are 
known by the same characters, and also by the radicle being turned towards 
the hilum, and the stipules not having the foi*m of ochrese. 
Geography. West Indian or tropical American plants ; for the Seguiera 
asiatica of Loureiro probably does not belong to the order. 
Properties. Nothing is known of their qualities, except that Petiveria 
alliacea yields a strong smell of garlic. 
GENERA. 
Petiveria, L. 
Seguiera, L. 
? Villamilla, R. P 
Alliance IV. SCLERALES. 
Essential Character. — Tube of the calyx hardened. 
