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SECT. XXV. 
APPENDAGES TO CERTAIN SEEDS. 
Nature with Art supreme maintains her race. 
Some seeds with wings adorns to fly in air; 
Others she arms with hooks, a vagrant tribe! 
And these, like dust, are wafted by each breeze. 
Boyd, 
The Appendages to seeds, or Coronula, are, I. The Pappus, or 
Crown . II. The Coma, or Tuft . III. The Pubes, or Down. IY. The 
Cauda, or Tail . Y. The Rostrum, or Beak. VI. The Ala, or Wing , 
VII. The Crista, or Crest . And VIII. The Hama, or Hook. 
I. The Pappus, or Crown , is commonly translated down , or wool, but 
this is botanically expressed by the terms lanugo and tomentum. , the woolly - 
ness , or soft short hairs on the surface of leaves. It is termed by the French 
aigrette . Linnaeus defines the Pappus to be “ a feathery, or hairy crown, 
adapted for flying.’ 5 Gsertner, with great propriety, restrains this part to 
that feathery, chaffy, or bristly down, of those seeds which have no pericarp , 
and which originate from a partial calyx, crowning the summit of the seeds, 
remaining after the corolla, &c. are fallen. 
The Pappus is either sessile or stipitate . 
1. The Sessile Crown is where the down is affixed directly upoq. 
the seed itself. 
2. The Stipitate Crown , where the down is attached to the seed by 
the intervention of a stipe , or thread , (stipes). 
Instances of this feathery appendage are in the Thistle (Carduus), 
whose crown is sessile ; and in the seeds of th z Dandelion (Leontodon) and 
Goafs-heard (Tragopogon), whose crown is stipitate. But in the Succory 
(Cichorium), it consists of mere chaffy teeth, which evinces its affinity with 
the calyx. In the Scabious (Scabiosa), it is double. In the Bur-marygold 
(Bidens), it is formed of two, three, or four-barbed bristles. 
