366 NATURAL HISTORY OF PLANTS. 
283. Sweetia Spruna.'—Receptacle obconical minute. Calyx sub- 
campanulate ; lobes or teeth 5, subequal, valvate or slightly imbri- 
cate. Corolla subregular; petals erect-spreading, long-tapering at 
base, imbricate in estivation ; uppermost (vexillary) often’ exterior; 
occasionally a little broader than rest. Stamens 10, slightly perigy- 
nous, longer than petals; filaments free inflexed in bud; anthers 
uniform. Germen stipitate in bottom of receptacle; ovules few 
descending ; style slender ; apex minute or truncate. Legume ellip- 
soid oval lanceolate or broadly linear, plano-compressed, coriaceous 
or submembranous, sometimes obscurely subulate at apex, indehiscent. 
Seeds 1 or few, compressed ; embryo exalbuminous ; cotyledons folia- 
ceous or rather thick; radicle short straight, orlonger incurved.—Trees; 
leaves pari- or imparipinnate; leaflets pauci- or o-jugate; stipules 
small or minute; flowers’ in compound racemes at ends of branches ; 
pedicels short; bracts and bractlets narrow, very caducous‘ (Zropical 
South America’). 
284. Myrocarpus Atiem.'—Receptacle obconical turbinate, dis- 
ciferous within. Calyx membranous; teeth 4, 5, short subequal or 
slightly unequal; or else superior connate. Petals 5, unguiculate 
linear, long-narrowed at base subequal, variably imbricated.’ Sta- 
mens 10, inserted perigynously with petals, exserted filaments free; 
anthers small uniform versatile. Germen central stipitate; ovules 
few reniform ; style short, straight or incurved ; apex minute stig- 
matiferous. Legume elongated much compressed, attenuated subu- 
late at sutures, indehiscent ; pericarp somewhat turgid over seeds 
stuffed, with resiniferous cavities. Seeds 1 or few, elongated sub- 
fusiform descending ;* embryo long cylindrical exalbuminous; radicle 
superior short straight.—Trees ; leaves imparipinnate, leaflets alter- 
nate or opposite, with transparent dots, stipules small, flowers 
racemose ; racemes slender, axillary or at ends of defoliated branches ; 
1 Syst., i, 171 (nec DC.).—B. H., Gen., 559, 1. Acosmium: calyx lobes shorter than tube; 
n, 288.—Acosmium Scuort, in Spreng. Syst., 
Cur, Post., 406.—ENDL., Gen., n, 6753.—Lep- 
tolobium Voa., in Linnea, xi.888.—ENDL., Gen., 
u. 6751.—Thalesia Maxt., mss, (ex ENDL.), 
2 But not always; hence this genus is as it 
were, through Barklya, intermediate between 
Sophoree and Casalpiniea. 
8 Yellowish, sometimes small and recalls 
those of many DMimosee and of Leptolo- 
biuwm. 
4 The genus is divided into 3 sections, viz, :—— 
radicle ineurved.—2, Leptolobium : calyx longer, 
radicle short straight.—3, Mesitis (Voa.): calyx 
of Leptolobium ; radicle of Acosmium., 
5 Species about 10, BEnTH., in Journ, Linn, 
Soc., viii. 261.—Waxp., Rep., i, 808; v. 550; 
Aun., ii, 440 (Leptolobium), 
§ AttEM., Diss. (1847, 48), icon.— B. H., 
Gen., 559, n, 287. 
7 Small, white. 
5 Closely appressed to pericarp, and not easily 
separable from it, though not altogether adherent, 
