181 



19 Restionaceae^^ : Very probably coimection is to be foiind ~in the 

 Olumiflorfe. 



20 Centrolepidaceae ^^ : Closely related to the Eriocanlaceae and to the 

 Kestionacece. It resembles the former family in Juncella with its capitate 

 flowers, wliile it approaches the latter in Gaimardia with its di-merous 

 flowers. 



21 Mayacaceae^^ : That a close relation exists between the MayacaceaB 

 and Hydrocharitaceae can not be denied, if the agreement of the two famiHes 

 in their axillary flowers, in the perianth, and in the parietal placenta is to 

 be regarded as a matter of importance. 



22 XyridaceaB : The relation of this to other families is as yet im- 

 known to us. 



23 Eriocaulaceae*^ : Eelated to the Restionacese, Centrolepidaceae, Maya- 

 cjicese and Xyridacese through the structure of the gynaeceum and stamens. 



24 Th.umiaceae : As above. 



25 Rapateaceae^^ : This family undoubtedly is closely related to the 

 Xyridaceae, Eriocaulaceae and other families; but differs from all of them in 

 having atropous o\Tiles. 



26 Bromeliaceae^^ : These are certainly related to the several famihes of 

 the Farinosse, such as the CommeHnaceae, Rapateacese, Mayacaceae and ITa- 

 gellariaceae, in their general characters. But in other respects, they are closely 

 connected with the LiHacege and AmarylHdacese of the LiKiflorae. When we 

 take the family's heteroclilamydeous character into account, its place is near 

 the Scitainineae, and the liliiflorae. In the position of the ovary on the 

 other hand, some of the Bromeliacese are related to the Orchidacese, to the 

 Hydrocharitaceae and to the Scitaminaceae. 



27 Commelinaceae : As above 



28 Pontederiaceae ^^' : Tliis family is somewhat related to the LiHacese 

 in floral structm'e. 



1) Nat. Pfl.-fam. n.-4, p. 15. 2) Nat. Pfl.-fam. n.— 4, p. 15. 



3) 1. c. n.-4, p. 18. 



4) RuHiiAND, W. — EriocaTilacese in das Pflanzenreich IV. — 30, p. 23. 



5) 1. c. II.— 4, p. 30. 



6) Nat. Pfl.-fam. II.— 4, p. 40. 7) 1. c. n.-4, p. 72. 



