DIFFERENT STRUCTURES OF THE SEEDS. 



31 



CHAP. XVI. 



OF THE DIFFERENT STRUCTURES OF THE SEEDS. 



IN respect to the Number of seeds contained within the fruit, 

 plants are either monospermous, having one seed, as in Polygonum 

 and Collinsonia ; ...dispermous, two, as in Daucus ; . ..trispermous, 

 three, as in Euphorbia or tetrasper?nous, four, as in Tourne- 



FORTIA. 



In respect to the number of loculaments of the seed itself, it 

 has but one in most plants but is bilocular, with two cells, in 

 Cornus, Xanthium, Locusta, Valeriana, and Cordia. 



In respect to its Figure, it is either cinct, girt, as in Arena- 

 ria and Bryonia ;...cordiform, heart-shaped, as in Medeola 

 rcniform, kidney-shaped, as in Anacardium and Phaseolus 

 ovate*, egg-shaped, as in Polygala and IsATis;...or echinate, 

 prickly, like an echinus, or hedge-hog, as in Lappula, a species 

 of Myosotis. 



In respect to their Substance, they are osseous, bony, as in 

 Corylus, Lithospermum, and nuts of all kinds;... or callous, 

 tough, as in Citrus. 



The Curonula, little crown, that attends many seeds, is either 

 calyculus, a small calyx formed of the perianthium of the flower, 

 as in Scabiosa, Knautia, Ageratum, and Arctotis\... or pappus, 

 a down; and this pappus is either capillary, like a hair, that is 

 simple and filiform;. ..thread- shaped, as in Hieracium and Sonchus* 

 ...plumose, feathejy, that is, shaggy and compound, as in Crepis, 

 Scorzonera, and Tragopogon paleaceous, chaffy, as in Bidens, 

 Silphium, Tagetes, and Coreopsis or zcanting, as in Tan a- 

 cetum. 



* The term ovate is used to express an elliptical figure when it is broader at one 

 etui than the other; mi the term oval for the same figure, when die ends are alike 



Author, 



