KEY TO FAMILIES AND ABNORMAL GENERA, xxv 

 Tree : leaves opposite : ovary two to three-celled .... 



57 S p. 79. MICROTROPIS. 



[ Herb, shrub or tree : ovary one-celled, p. 366. urticace^. 

 ' 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). . p. 350. thymeleace^. 



J Tree : stamens united at the base : seeds many with 



I coloured aril : flowers fascicled . /. 162. samydacE/e. 



Herb or shrub : stipules or tubes encircling the stem at 



each node : seed solitary erect . p. 338. POLYGONACEiE. 



Shrub : flowers often unisexual : anthers large : fruit 



three-winged capsule /. 88. dodon^a. 



Herb with much divided leaves : carpels many separate. 



/. 4. THALICTRUM. 



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



dry /• 359- euphorbjace^. 



59<[ Tree : female flower surrounded at the base by imbricating 

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



Sak p, 377. QUERCUS. 



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



I P' 337- PHYTOLACCA. 



Flowers in a thick spike enclosed in a spathe : leaves large, 

 radical ....../. 424. arace^e. 



Flowers in slender spikes : climbers with alternate three- 

 nerved leaves or epiphytes with leaves in fours . . . 



p. 342. PIPERACE/E. 



60 \ Flower consisting of two or more stamens and an ovary 

 only in the axil of a small bract, arranged in spikes. 

 Trees with alternate, stipulate, toothed leaves (Willow) 



/. 377. SALIX. 



Flowers aggregated in flat or hollow, fleshy involucres . . 



/. 366. URTICACEiE. 



Sepals three, petals three, stamens usually three or six. 



Stamens and style united into one column : one petal 

 (usually the front one) larger often spurred or saccate : 

 seeds minute. Perennial herbs, on the ground or on 

 trees A 379- orchidace/e. 



61 \ Anthers five, connected round the stigma, but free of it : 

 hind petal hooded, two front petals bifid : front sepal 

 spurred or saccate. Herbs, all on the ground . . . 



/. 59. balsam INEiE. 



Other herbs, shrubsj^and trees 62 



