21S 



THE FLORA. 



Order LXVII. IIUBIACEJE. The Madderworts. 



Plants witli opposite, sometimes whorled, entire leaves ; the 

 sllpulcs between the petioles ; the cahjx adherent to the ovary; 

 corolla regular, inserted on the calyx tube; 

 stamens inserted on the corolla and as many as its lobes ; 

 ovaries 2, nnited ; with the 2 styles more or less united. 



Analysis of the Genera. 



§ Leaves ^YllOl•led. Herbs ^vitll square stems a 



§ Leaves opposite, with small stipules between the petioles 2 



2 Herbs, with the flowers habitually 4-parted ... .3 



2 Shrubs or trees d 



3 FIs. twin (always in pairs) b 



3 Flowers single (not twin) c 



a Flowers 5-parted. Fruit twm, 



fleshy, berry-like. Madder. Ru'bia. 

 a Flowers 4-parted. Fruit twin, dry, 



separable nuts. JSedstraw. Ga'lium. 

 b Two fls. on one ovary. Creeping 



stems. Partridge-leri'y. Mitchkl'la. 1 

 c Carpels 2, 1-seeded, both never open- 

 ing. Fls. axillary, solitary. Dio'dia. 

 c Carp. 2, 1-seeded, one never opening. 



Fls. axillary, clustered. Spermaco'ce. 

 c Carpels 2, few-seeded. Corolla 



much exscrted. Bluets. Housto'nia. 2 

 c Carpels 2, mauy-soeded. Cor. scarce 

 exscrted. Greenhead. Oldenlan'dia. 

 d Flowers 4-parted, in globular 



hds. Button-hush. Cephalan'thus. 

 d FIs. 5-parted, cymes radiant 



with scarlet sepals. S. Pinckne'ya. 



X. MITCIIEL'LA. Partridge-berry. 



Flowers 2 on each double ovary. Ca- 

 hx 4-parted. Corolla funnel-shaped, 

 iiairy within. Stamens 4, short, insert- Fig. 497. Mitcheiia rcpcns, ^vhoie 



, ,, n Oi. , -r> • plant, with flowers and fruit, o, cross- 



ed on the corolla. Stigmas 4.^ Berries Ltion of ibe double fruit, showing ti.e 

 composed of the 2 united ovaries. Jn, two ovaries. 



