KEY TO THE FAMILIES AND CERTAIN 

 ABNORMAL GENERA. 



n 



C Flowers in compact heads backed by an involucre of green 



J bracts 2 



^ j Flowers solitary or variously arranged, if in a head with no 

 [ involucre of separable bracts below .3 



f Heads white or grey on leafless stalks rising from u group 

 of narrow radical leaves. Flowers minute. (Hatpin 



flower) /. 427. ERIOCAULON. 



Anthers united round the style. No calyx. (Sunflower, 



etc.) /. 205. COMPOSITE. 



Anthers free attached at various heights to the inside 

 of the slender perianth. Heads very densely woody. 



/. 350. LASIOSIPHON. 



Anthers free on slender filaments. Leaves opposite . . . 



! /. 204. DIPSACUS. 



f Flowers small in spikelets. (Grasses and Sedges) . 70 



3-{ Flowers minute, without sepals or petals .... 60 



[ A perianth round each flower ........ 4 



\ Perianth inconspicuous, of one whorl not distinguishable 



J as petals and sepals, greenish or brownish ... 54 



"*■ I Perianth conspicuous, usually of white or coloured petals 



[ and green sepals 5 



Sepals and petals four or five ; petals quite free at the 

 base 7 



Sepals and petals four or five ; petals united at least at the 

 5^ base 34 



Sepals and petals three, all alike or sepals less coloured, or 

 one petal or sepal larger or spurred 61 



Sepals five, petals three 6 



C Flowers minute in large panicles : fruit ^ inch; drape. 



6-; (Spiraea tree) P- 9^- meliosma. 



L Lowest petal boat-shaped, fringed . . /. 26. polygala. 



f Ovary superior, i.e., inserted above the base of the inferior 



J petals and stamens 8 



' j Ovary inferior, usually sunk in the end of the flower- 

 [ stalk 23 



c 



