LEGUMINOS^E 387 



oblong type are shown by Hovea longifolia, Goodia lotifolia, 

 Eetama Eoetam, Ulex europseus (fig. 268), and species of 

 Cytisus. The first three leaves of Goodia lotifolia are pseudo- 

 verticillate, a very rare circumstance. Two are broadly ovate 

 and simple, while the third leaf is pinnately trifoliolate 

 and inserted at right angles to the other two, but on the 

 same level, owing to the internode not being developed. The 

 first seven leaves of Eetama Bcetam are simple, alternate, 

 and smaller than the cotyledons. A remarkable amount of 

 variation is noticeable in the leaves of different seedlings of 

 Ulex europseus. In some the leaves are all simple, in others 

 the primary leaves are simple, while those that succeed them 

 are trifoliolate ; in other cases the leaves are all trifoliolate. 

 They are opposite or alternate apparently indiscriminately. 

 All ultimately become modified into simple spines, or may be 

 altogether aborted, while the branches form compound or 

 branching spines. 



Two of the leading modifications occur in this tribe, with 

 some exceptional cases. Bossisea linophylla (fig. 263) shows 

 oblong cotyledons slightly indented at the sides, a peculiarity 

 due to a thickening or an indentation at the chalaza of the 

 seed. Others agreeing with this type are B, rufa, Laburnum 

 alpinum, L. vulgare (fig. 267), Genista, Crotalaria quinque- 

 folia, and other species of Crotalaria. The indentation is 

 very marked in the last genus. Spartocytisus nubigenus has 

 spathulate cotyledons and is somewhat exceptional in that 

 respect; the first four leaves are digitately trifoliolate with 

 narrowly linear leaflets. Bossirea linophylla has the first 

 three leaves like those of Goodia lotifolia except that the odd 

 one, like the two following, is simple. All the five are obcor- 

 date, while the ultimate leaves are linear. The first five leaves 

 of B. rufa are oval-elliptic, the first pair being opposite, the 

 rest alternate. The first leaf of Crotalaria quinquefolia is 

 obovate, obsoletely trifid, and alternate, but in other species 

 the first pair are opposite. The leaves of the two common 

 species of Laburnum are alternate and digitately trifoliolate 

 from the first. A second well-marked modification is met with 

 in the genus Lupinus. The cotyledons are unequal at the 

 base, a peculiarity due to the radicle being sharply bent round 



