LEGUMINOS-CO4SALPINIEZ. 77 
because its stipitate gyneceum consists of a one-celled ovary sur- 
mounted by a filiform style with a concave ciliate stigma, while its 
anatropous suspended ovule, whose micropyle looks upwards and 
outwards, becomes an oval exalbuminous seed with a fleshy embryo 
and straight radicle in the short oval compressed bivalve fruit. 
But the flower is otherwise altogether similar to that in any of the 
sections Pomaria, Cladotrichium, Hoffmanseggia, &c., of Cesalpinia ; 
we have the same concave receptacle lined with glandular fissue, the 
same irregular imbricated calyx with a large anterior sepal enveloping 
the rest, the same irregular corolla with the vexillary petal internal, 
and the same perigynous androceum whose ten stamens have the 
lower part of their declinate filaments covered with hairs. Again, 
the alternate pinnate leaves of Zuccagnia, with their smal] leaflets, 
are glutinous, as is the case with nearly the whole surface of the 
plant; and the flowers form racemes resembling those of Hoffman- 
seggia. From all these reasons we conclude to regard Zuccagnia 
as Cesalpinia with a uniovulate ovary, simply-pinnate leaves, and 
a one-seeded fruit ; the two last characters bringing it very near 
the sections Pomaria and Paripinnaria of this genus. 
Parkinsonia has altogether the flowers of Cesalpinia: the same 
perianth, sexual organs, and cup-shaped receptacle. The style, how- 
ever, is not dilated at the apex, but is more or less obliquely truncate, 
while the fruit is very different. It is a rounded torulose elongated 
pod, dehiscing more or less completely in two valves, and containing 
at each of the dilatations of the rather thin pericarp a descending seed, 
whose coats contain a fairly copious albumen, and an embryo with 
its radicle superior. Parkinsonia consists of trees from tropical 
America and South Africa, with bipinnate leaves of very peculiar 
form, possessing a very short rachis, from either side of which 
arises a secondary rachis bearing numerous leaflets. The stipules 
are ill-developed or spinescent, and the flowers form axillary racemes. 
Three species are known.’ 
Cercidium, like Parkinsonia, differs but slightly in flower from 
1 Prum., Nov. Gen. Amer., 25.—L., Gen., 
n. 513.—J., Gen., 347.—Lamr., Dict., v. 21; 
Suppl. iv. 302 ; Iil., t.8336.—DC., Mém. Légum., 
t. 21, fig. 112; Prodr., ii. 486.—Spacnu, Suit. 
@ Buffon, i. 107—Envu., Gen, u. 6775.— 
B. H., Gen., 570, n. 321. 
2 Jacg., Amer., t. 80.—H. B. K., Nov. Gen. 
et Spec., vi. 335.—Harv. & Sonp., Fl. Cap,, ii. 
269.—Watp., Ann., ii. 441; iv. 594.—OxIv., 
Fl. Trop, Afr., ii. 266. 
3 Tun. Arch. Mus., iv. 133.—B. H., Gen., 
570, 1002, n. 8320.—Retinophlewm Karst., Fl. 
Columb., ii. 25, t. 118.—Hoopesia Buck, in 
Proceed. Ac. Nat, Sc, Philad, (part.), ex A. 
Gray, ibid. (1862), 163. 
