PHAOTlROaAMIA- 373 



Gk., Tithgmalopsis, KL and Gk., Dichropliyllum, Kl. and Gk., 

 Leptopus, Kl. and Gk., Adenopetalum, Kl. andGk., (B. Tithymalse, 

 — Involucri lobi exteriores supra callo carnoso(Glandula)toti tecti), 

 Euphorbia, L., Medusea, Kl. and Gk., Arthrothamnus, Kl. and Gk., 

 Tithymalus, Scop, (to which belong most of the British species), 

 Sterigmanthe, Kl. and Gk., Eupliorhiastrum, Kl. and Gk., Poin- 

 settia, Grah. 



Section Pedilanthese, Kl. and Gk. includes Pedilanthus, Neck., 

 Hexadenia, Kl. and Gk. and Diadenaria, Kl. and Gk. ; — Antho- 

 steineae, Kl. and Gk., the genus Anthostema, Juss. 



Besides nearly ninety pages devoted to a systematic enumera- 

 ration of species, &c. the essay contains a historical sketch of the 

 Tricoccae, the treatment of the group by various authors, critical 

 remarks on M. Baillon's work on Euphorbiacea?, and observations 

 upon the changes proposed by the author. 

 Kokntcke, Fr. — Monographic Marantearum Prodromus. — Nouv. 

 Mem. Soc. Imp. Nat. Moscou. Tom. xi. pp. 297-362. With 

 8 plates. 



The author's investigations on the structure of the flower in 

 Marantaceae are based upon species cultivated in the St. Peters- 

 burg Botanic Garden and upon herbarium specimens. He regards 

 the corolla as tripetalous, and the staminodia as biserial. In Ma- 

 ranta (and Phrynium) there are two staminodia in the outer 

 series ; in Calatliea, Thalia, and Ischnosiplion, but one ; while in 

 Monosticlie, Marantopsis, and Distention, they are entirely want- 

 ing. The three staminodia of the inner series are either all pre- 

 sent, — one bearing the fertile anther-cell, — or (in Distemon) one 

 is abortive. 



The structure of the several whorls of the flower in various 

 genera is described in detail, as also that of the fruit and seed. 



The distinctions between Cannaceae and Zingiberaceae are 

 summed up as follows. In Cannaceae, it is the inner circle of 

 staminodia, which, by preference, is developed, while the outer 

 always remains incomplete. The fifth staminodium is petaloid 

 and bears the fertile half-anther. 



In Zingiberaceae, it is especially the outer circle of staminodia 

 which becomes developed, the inner always remaining imperfect. 

 The fertile stamen is the sixth of the series. It is symmetrical 

 and bears a perfect anther. 



A synopsis and critical descriptions of the genera of Marantecz 

 (adopted as a Tribe of Cannaceae) is given. Ischnodphon and 

 MonosticJie are genera founded by the author on South American 

 and West Indian species. The characters of the last genus are 

 not contrasted in the synoptical key owing to the allied genus 

 Calatliea being described, through a lapsus, as destitute of an outer 

 staminodium. The species are not described. 

 ■ — ■ Ueber Calathea fasciata, Bgl. et Kor. und einige andere bunt- 



