AETIFICIAL KEY TO THE FAMILIES. 63 



Floivers simple, regular, pentamerous, and with exactly 5 stamens. 

 (Calyx and corolla both usually p)resent.) 



A. 



Growing in Water, the foliage either submerged, or floating upon 



THE surface. 



Leaves pectinate ; flowers lilac Water Feather/oil, 265 



Leaves circular and undivided ; flowers yellow Villarsia, 217 



Leaves oblong and undi\"ided; flowers rose-coloured. . . . Water Persicaria, 135 



B. 

 Growing on Land, or if in watery places, neither submerged nor 

 floating. 

 a. Stems twining. 



Plant rough ; flowers in panicles Hop (male plant), 356 



Plant smooth ; flowers solitary, or in umbels Convolvulus family, 229 



B. Stems provided with spiral tendrils. 



Petals 10. Leaves with large stipules Passion-flower family,lS9 



Petals 5, yellow or green. 



Plant rough Cucumher family, 350 



Plant smooth Vine family, 151 



c. Stem neither twining, nor provided with spiral tendrils. 



Flowers appearing before the leaves come out . . ..Elm trees, 204 

 Flowers and leaves cotemporaneous. 



1. Leaves all radical, covered on the upper surface 



and along the edges with large glandular 



red hairs Sundew, 153 



2. Leaves minute, closely appressed against the 



stem and twigs. Shrub Tamarisk, 164 



3. Leaves covered with pellucid dots. Ovary 



inside the corolla Rue family (some), 155 



4. Leaves resinously glandular, aromatic. Ovary 



below the corolla Escallonia, 343 



5. Leaves parallel-veined, small, rigid, and dry. 



Green-house shrubs Epacris family, 131 



6. Yellowish -brown scales instead of leaves .... Yellow Bird's-nest (lateral 



flowers), 164, 538 



7. Leaves neither glandular, appressed, dotted, 



nor parallel-veined. 

 + Stamens and pistil consolidated into a hard and 



star-like body Wax -flower family, 239 



++ Stamens and pistU distinct and unconnected. 



II Anthers foi-ming a large and prominent cone in 

 the centre of the flower. 



Leaves all radical Virginian Cowslip, 270 



Stem clothed with leaves. 



Anthers black Borage, 235 



Anthers yellow Solanum, 221 



