228 PAPPUS, THE SEED-DOWN. 



seeds in question. The same may be observed of 

 Ranunculus, Myosurus, see Engl. Bot. t. 435, 

 Clematis, Anemone, &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 Gartner, 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, &c., what has often been 

 called Arillus,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 Capsules. 



The loose husky covering of the seed in Carev, 



y. 202, is surely an Arillus. See Engl. Bot. also 



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



Dr. Rees's Cyclopedia, 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 constitutes the bran, the husks of the blossom 



being the chaff. 



Pappus, the Seed-down, is restrained by Gaertner 

 to the chaffy, feathery, or bristly crown of many 

 seeds that have no Pericarpium, and which origi- 

 nates from a partial calyx, crowning the summit of 

 each of those seeds, and remaining after the flower 

 is fallen. Instances of this are the feathery appen- 

 dages to the seeds of Dandelion, EngL Bot. t.5W, 



