Mr. Knight on the Influence of Pollen in Cross-breeding. 191 



3. LoRATiE, foliis loratis, apicem versus sensim angustiori- 



bus, subtus convexis, quadrifariam imbricatim cespi- 

 tosis, caule herbaceo, scapis foliosis. 



8. impressa, supra. 



9. hispida, Nobis MS. 



4. ANGUSTATiE, foliis linearibus semiteretibus sulcatis tere- 



tibusve. Herbee cespitosae scapis defoliatis. Haec 

 sectio fortasse melius ante priorem ? 



10. sulcata, Nob. in Revis. PI. Succ. 



1 1 . nudicaulis, Nob. Crassula nudicaulis Linn. 



5. Subulate, Suffrutices dodrantales ramosi, foliis subu- 



latis, carnosis, supra planiusculis ; floribus dense cy- 

 moso-capitatis terminalibus. 



12. Mesembryantlioid.es, supra. 



13. mollis. Crassula mollis, Aitoni aliorumque, 

 sed hujus generis omnino. 



14. siiuincana, supra. 



Postscript. — Of the new species in the above list marked 

 MS. you may expect a further account as soon as they pro- 

 duce their fructifications. 



It may probably excite some surprise to see so many new 

 Crassulaean plants here enumerated ; and yet they are not all 

 the unrecorded species the writer is well acquainted with. 

 And more still, may be expected soon from abroad, especially 

 from Southern Africa (Nature's great store-house for succulent 

 plants), and where, perhaps, full half as many of the present 

 tribe actually exist, as of Mcsembryanthema ; which last vast 

 group may at length be found to rival or surpass in number, 

 if not in elegance and beauty, the more extensively discovered 

 Heaths : for Mr. Bowie assures me that he has seen in Africa 

 a great number of native succulent plants of various kinds, 

 which he has not been able to send to England in a living 

 state. 



XXXII. Some Remarks on the supposed Influence of the Pollen 

 in Cross-breeding, upon the Colour of the Seed-coats of Plants, 

 and the Qualities of their Fruits. By Thomas Andrew 

 Knight, Esq. F.R.S., fyc. President.* 



T has been long ago ascertained by physiologists, that the 

 seed-coats, or membranes which cover the cotyledons of 

 the seeds of plants, with the receptacles which contain such 



• From the Transactions of the Horticultural Society, vol. v. Part IV. 



seed- 



I 



