DICOTYLEDONES : POLTPETALJ) : THALAMIFLOR.E. 609 



Order 2. Tamaricacej;. Flowers 4- or 5-merous, with one or 

 two whorls of stamens : calyx gamosepalous : ovary usually tri- 

 merous, unilocular, with basal or parietal placentation : capsule 

 loculicidal : seeds with hairs : flowers in racemes or spikes. 



This order inclades the shrubs known as Tamarisks : Myricaria, Tamarix, 

 Reaumuria, and Fouquiera. Myricaria (Tamarix) germanica has monadelphous 

 stamens. Tamarix galUca (or T. anglica) has become naturalised in England. 



Closely allied with this order and with the Elatinaceae is the small order of 

 Frankeniace^ ; the flower resembles that of Tamarix in the gamosepalous 

 calyx and in the morphology of the gynaeceum : Frankenia lavis, the Sea-Heath, 

 occurs in salt-marshes in Britain. 



Order 3. ELATiNACEiE. Small water-plants, with entire stipulate 

 leaves opposite or in whorls : flowers 3-4-merous ; formula Xn, 

 On, ^n + n, (?'-* ; solitary, without bracteoles, borne in the axils of 

 the foliage-leaves : ovary raultilocular. 



E. hexandra and Hydropiper (Waterworts, or Water-peppers) occur, but not 

 commonly, on the margins of lakes in England. 



Order 4. Ternstrcemiace^. Perianth spiral ; the calyx is not 

 clearly distinguishable from the numerous bracteoles : stamens in- 

 definite : ovary multilocular. Trees or shrubs with scattered, 

 generally coriaceous, entire leaves, without stipules. 



Camellia japonic a is a favourite ornamental shrub : Thea chinensis, of which 

 the dried leaves are tea ; black and green tea are varieties resulting only from 

 the mode of drying the leaf. 



Order 5. Clusiacej: (Guttifer^). Trees or shrubs with di- 

 clinous flowers. 



Order 6. Dipterocarpacej). Trees: leaves usually stipulate: 

 the gamosepalous calyx enlarges very much during the ripening of 

 the fruit. 



Dryobalanops Camphora, a native of Sumatra, yields the Borneo Camphor. 



Cohort VII. Mai vales. Flowers cyclic, generally pentamerous 

 and actinomorphic : calyx often gamosepalous, with valvate aesti- 

 vation : corolla with usually contorted aestivation : stamens typi- 

 cally in two whorls, frequently obdiplostemonous, sometimes 

 branched, and often connate : carpels usually five and then anti- 

 petalous, often forming a multilocular ovary : seed usually with 

 endosperm. 



Order ]. Tiliacej:. Sepals usually free: stamens 10 or 

 indefinite, sometimes polyadelphous j in the indigenous species the 



