450 NATURAL HISTORY OF PLANTS. 
. mate, or in various numbers, on a level with the insertion of the 
leaves, but lateral to them. 
We have connected with this genus as simple sections, corre- 
sponding to most of those admitted in the genus Zygophyllum: 
Porlieria, composed of species from Western temperate America, 
having a short support to the ovary, staminal filaments lined by a 
scale, from three to five carpels to-the glabrous fruit, and compound- 
pinnate leaves ; Pintoa, aChilian shrub, having a short, thick ovary . 
support, staminal appendages cut pretty deeply, a capsular fruit 
with five grooves comparable to those of Zygophyllum Fabago, and 
paripinnate leaves ; Bulnesia, a spartioidal shrub of the same country, 
with small paripinnate leaves, has staminal appendages similar to 
those of Pintoa, but with fruits the cells of which are prolonged into 
pretty large vertical wings, as in Repera and Sarcozygium. Finally, 
Larrea, consisting of balsamic shrubs from the temperate Western 
regions of the two Americas, with pinnate leaves, bi- or plurifolio- 
late, short ovary support, staminal scales, simple, bifid or deeply cut 
at the summit, and fruits the four or five carinate shells of which 
are villous; Plectrocarpa, a shrub from Mendoza, nearly allied to the 
preceding genus, with thorny branches, and slightly irregular impari- 
pinnate leaves, only two ovules in each cell, the fruit being elongated 
and velvety, each of its five shells armed dorsally with a subulate 
spur. Chitonia, a Mexican shrub, with pinnate leaves opposite or 
alternate, is also nearly allied to the preceding genera. The flowers 
are tetramerous, the corolla very large, regular, with eight inappen- 
diculate stamens, a style with large stigmatiferous head, pluri- 
ovulate ovary cells, and having for fruit a four-winged or four-valved 
capsule, the cells usually containing two descending seeds, with 
embryo surrounded by fleshy albumen. 
XII. NITRARIA SERIES. 
Nitrari@ (figs. 515-520) alone constitutes this small series; it has 
regular, hermaphrodite flowers. The convex receptacle bears an 

1 L., Gen. n. 602.—ADANS., Fam. des P1., Gen. Nitraria (in Ann. Se, Nat., sér. 3, xiii. 
ii, 447.—J, Gen, 316.—GmRtN., Fruct., i, 21).—Linpz., Veg. Kingd., 389, fig. 275.— 
279, t. 58.—LeERcH., in Nov. Act. Nat. Cur., v. Payer, Organog., 121, t. 26.—Age., Theor. 
App:, 162.—LamMk., Til., t. 403.—Porr., Dict., Syst., 867.—B. H., Gen., 265, n. 5.—H. By., 
iv. 492; Suppl., iv. 99.—DC., Prodr., iii, 456.— in Payer Fam. Nat., 318.— Osyris GMEL., (nec 
npn, Gen., n. 5714.—Jaus. & Spacu, Consp. L., ex ADANS.). 
