LIMNANTHACEX.—OXALIDACES. 497 
hilum. This order is included in Geraniacee by Bentham and 
Hooker. 
Distribution and Numbers. —Chiefly natives of South Ame- 
rica. Illustrative Genera: —Tropeolum, Linn. ; Chymocarpus, 
Don. There are about 40 species. 
Properties and Uses.—Generally acrid, pungent, and anti- 
scorbutic, resembling the Crucifere. The unripe fruit of 
Tropxolum majus, which is commonly known as Indian Cress 
or Garden Nasturtium, is frequently pickled, and employed by 
housekeepers as a substitute for Capers. Most of the T'ro- 
pxolums have tubercular roots, some of which are edible, as 
T. tuberosum. 
Order 9. LimnantTHace®, the Limnanthes Order.—Diagqnosis. 
—This is a small order of plants included by Lindley in the 
Tropzeolaceze, with which it agrees in its general characters ; but 
it is distinguished from that order by having regular flowers ; 
more evidently perigynous stamens; and erect ovules. It is 
placed in Geraniaceer by Bentham and Hooker. 
Fie. 932. Fie. 938. Fic. 934. 
Fig. 932. Diagram of the flower of Ovalis. Fig. 933. Vertical section of 
the flower of the same.— Fg. 934. Vertical section of the seed. 
Distribution and Numbers.— Natives of North America. 
Illustrative Genus :—Limnanthes, R. Br. There are 3 species. 
Properties and Uses.—In these they resemble the Cruciferze 
and Tropzeolacee. 
Order 10. OXaLIDACE, the Wood: sorrel Order.—Character. 
—RHerbs, or rarely shrubs or trees, generally with an acid juice. 
Leaves alternate or rarely opposite, usually compound or occa- 
sionally simple; generally with stipules, or rarely exstipulate. 
Flowers regular and symmetrical. Sepals 5 (fig. 932), per- 
sistent, imbricate, occasionally somewhat united at their base. 
Petals 5 (fig. 932), hypogynous (fig. 933), unguiculate, rarely 
wanting; xstivation twisted. Stamens double the number of 
the petals and sepals (fig. 952), arranged in two rows alternating 
with each other, the inner row longer than the cuter (jigs. 550 
KK 
