KEY TO FAMILIES AND ABNORMAL GENERA xvii 



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 p. 360. euphorbia. 



Flowers unisexual in a short thick spike with bracts below : 

 57<J mal-e perianth red, lobed \ 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 . 58 



Stamens five to twelve . 62 



Stamens numerous 63 



Ovary inferior 59 



58^ Ovary superior: stamens opposite the sepals one seed 



only 60 



Trailing plant with long stalked, round-lobes, leaves 



folded fanwise /• i37» alchemilla. 



J Shrub often straggling or spiny : all parts covered with flat 



59 1 glistening scales A SS^- el^agnus. 



1 Shrub or herb : no glistening scales . /. 357. santalace/e. 

 1 Marsh or water plants . . . p. ^^. HALORRHAGiDACEyE. 



, r Ovary one-celled. Firs, unisexual 61 



\ Capsule three or ten-celled : trees . . /. 105. euphorbia. 

 ( Trees with unisexual flowers and fleshy drupe .... 



^ ! /. 106. DAPHNIPHYLLUM. 



I Herbs with spiny deflexed flrs. . . p. 98. amarantace^. 

 [ Herb, shrub or tree : ovary one-celled./. 366. URTiCACEiE. 



Stamens twelve, fruit i inch, transversely two-lobed : leaves 

 entire. A tree . /, 130. pygeum. 



Stamens ten, attached at various heights inside the tubular 

 perianth. A small tree (see 2) . /. 350. thymelace^. 



Tree : stamens united at the base : seeds many with 

 coloured aril : flowers fascicled . /. 162. samydace^. 



Herb or shrub : stipules or tubes encircling the stem at 

 each node : seed solitary erect . p. 338. polygonace^. 



Shrub : flowers often unisexual : anthers large : fruit three- 

 winged capsule . . . . . . . p.^'i. DODON^A. 



Herb with much divided leaves : carpels many separate. 



p. 4. THALICTRUM. 



Trees : leaves entire : flower unisexual : fruit a drupe or 



dry /. 359. EUPHORBlACEiE. 



63^ Tree: female flower surrounded at the base by imbricating 

 scales, which in fruit form a cup holding the nut (acorn) 



oak ' ' ' p. 377- QUERCUS. 



Shrub : carpels in fruit fleshy, each with one seed . . . 



/. 337. phytolacga. 



62 "i 



