xxiv KEY TO FAMILIES AND ABNORMAL GENERA. 



Fruit of four (dry) nutlets : flowers usually in dense 



whorls : scented herbs /. 321. LABiATiE. 



51^ Fruit fleshy or of two parts: flowers in spikes or open 



I panicles . . /. 318. verbenace^. 



[ Fruit a capsule with few or many seeds . , . . 52 



[ Nodes swollen : bracts in spike conspicuous : capsule 

 I oblong: seeds on springy-stalks . /. 310. acanthace^. 

 52 ^ Capsule long and slender : leaves thick. 



I p. 308. iESCHYNANTHUS. 



[Capsule short 53 



[ Small marsh plants with submerged, finely divided leaves, 

 I often bearing bladders : flowers few with sharp spur. 



53^ /. 306. UTRICULARIA. 



I Capsule globose or oblong : seeds not on hard stalks : 

 [ bracts not conspicuous . . /. 298. scrophulariace^. 



Petal- less floivers. 



(The following are a mixed lot, containing families with only 

 one perianth whorl and petal-less genera and species from 

 families which have normally complete flowers. For flowers 

 with conspicuous coloured sepals but no petals see Nos. 2 

 and 8.) 



' Flower ' apparently consisting of a four or five-lobed cup 

 enclosing numerous stamens (male flowers), and a solitary 

 stalked, three-lobed ovary (female flower). Herbs with 

 milky juice /, 360. euphorbia. 



Flowers unisexual in a short thick spike with bracts below : 

 male perianth red, lobed, J^ inch ; stamens united ; 

 female without perianth. Thick warty leafless plant 

 parasitic on the roots of trees . p. 358. balanophora. 



Stamens one to five, as many as the sepals or fewer : fruit 

 one-seeded 55 



Stamens five to twelve . 58 



Stamens numerous 59 



{Ovary inferior 56 

 Ovary superior : stamens opposite the sepals. ... 57 



r Trailing plant with long stalked, round-lobed, leaves 



I folded fanwise /. 137. alchemilla. 



56-! Shrub often straggling or spiny : all parts covered with flat 



I glistening scales A SS^- el/eagnus. 



[ Shrub or herb : no glistening scales, p. 357. santalace^e. 



54 



