236 OF rriL AniLLtJ!& 



filaments which make a peculiar part of the character 

 oi Borofiia. 



It is not easy to say whether the various, and fre- 

 quently elaborate coat of the seed among the rough- 

 leaved plants, Borago, Anchusa^ Lithospermum^ Cyn- 

 oglosum,/. 201, Engl. Bot. t. 921, Sec, should be es- 

 teemed an Arillus or a Testa ; but the latter seems 

 most correct, each seed having only a simple and very 

 thin membranous internal skin besides. Gasrtner 

 therefore justly uses the term Nut for the seeds 

 in question. The same may be observed of Ranun- 

 culuSy Myosurus, see Engl. Bot. t. 435, Clematis, Ane- 

 mone., &:c., whose external coats are no less various 

 and elaborate ; yet such seeds are as truly naked as 

 those of the Didynamia class, figured in Gseituer, t. 

 66, each having a double skin and no more, which is 

 one covering less than even the genuine nut of the 

 stone fruit, or of the Corylus. In Geranium., Malva^ 

 8cc., what has often been called AriUus, is rather a 

 kind of Capsule, not only because their seeds have a 

 double or even triple skin, quite unconnected with 

 this outer cover, but because the latter is analogous to 

 other CapsuleSo 



The loose husky covering of the seed in Car ex., f. 

 202, is surely an Arillus. Sec Engl. Bot. also the 

 Rev. Mr. Wood's observations on this genus in Dr. 

 Ree's Cyclopcedia., and Gcertner, v. 1. 13. This seed 

 has besides a double Testa., though most of the true 

 Grasses have but one, which in ground Corn consti- 

 tutes the bran, the husks of the blossom being the 

 chafl; 



