KEY TO THE FAMILIES AND CERTAIN 

 ABNORMAL GENERA. 



^i 



2 4 



Flowers in compact heads backed by an involucre of green 

 bracts 2 



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



involucre of separable bracts below ..... 3 



' Heads white or grey on leafless stalks rising from a group 



of narrow radical leaves. Flowers minute. (Hatpin 



flower) /. 427. ERIOCAULON. 



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



etc.) /. 205. COMPOSITiE. 



Anthers free attached at various heights to the inside of 

 the slender perianth. Heads very densely woolly. 



/. 350. LASIOSIPHON. 



Anthers free on slender filaments. Leaves opposite. 



p. 204. DIPSACUS. 



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

 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 

 ^ ' Perianth conspicuous, usually of white or coloured petals 



and green sepals . . . , 5 



Sepals or petals two, four or five ; petals quite free at the 



base 7 



Sepals or petals two, four or five ; petals united at least at 



5 <[ the base 34 



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



I one petal or sepal larger or spurred 61 



[ Sepals five, petals three 6 



f Flowers minute in large panicles : fruit ^ inch, drupe. 



(Spiraea tree) Vol. i /., 91. meliosma. 



, Lowest petal boat-shaped, fringed ........ 



[ Vol. I p. 26. POLYGALA. 



r Ovary or carpels, superior, i.e., inserted above the base of 



I the inferior petals and stamens 8 



J Ovary inferior, usually sunk in the end of the flower- 



' I stalk below the sepals 28 



I Ovary at the bottom of but not enclosed in the calyx : 

 [ petals and stamens arising above it. /. 52. LVTHRACEiE. 

 c 



6^ 



