70 BOTANICAL INFORMATION. 



continuous, parallel sori. — Fronds fragile, of two^fonns, the 

 sterile sinuate-pinnatijid or bipinnatijid, fertile decompound^ 

 multifid, lacinicB linear, revolute, forked, viviparous. Sporangia 

 large, sessile, furnished either with a broad nearly complete or 

 very short nearly obsolete ring. 



Species. 1. C. thalictroides ; Brong. 2. C. Parkeria ; 

 ( Parkeria pteridioides; //ooA.) — Illust. Bauer's gen. fil. t. 12. 

 Hook, et Grev. Ic. Fd. t.97. 



Obs. The very distinct and peculiar habit of this genus 

 renders it difficult to determine its real affinity; for, besides 

 the very distinct character of the fronds, the sporangia ex- 

 hibit a peculiar structure, being large, globose, and either 

 furnished with a broad nearly complete vertical ring, or with 

 a very short or nearly obsolete one, and which according to 

 the views of some authors is said to be transverse, and the 

 genus has therefore been hitherto associated with Gleichenia; 

 but observations have shown that the ring rises from the 

 axis of attachment, as in PolypodiacecB. The supposition of 

 -its being transverse may have arisen by observing the direc- 

 tion of the sporangia in connexion with its attachment, it 

 being generally loose and decumbent. And on reviewing the 

 whole of the structure of this singular genus, I am disposed 

 to consider it to have more affinity with genera belonging to 

 PolypodietE, than with any genus of the succeeding tribes. 



{To be continued.) 



Ill— BOTANICAL INFORMATION. 



UNIO ITINERARIA. 

 Mr PaxMplin has recently received the second portion of 

 Schimper's Abyssinian plants for distribution ; that is, Sectio 

 prima, Pars 2da., consisting of two hundred species. The 

 Report which accompanied these plants is highly satisfactory ; 

 no doubt being now expressed as to the ability fully to cover 

 the claims of the original subscribers, at the very low rate 



