194 Mr. D. Don's Descriptions of new Genera and Species 



Involucrum copiosfe glandulosum, serie simplici 8-phyllum. 

 bracteis araplis, foliaceis, ovato-lanceolatis, mucronatis ob- 

 vallatum ; folioUs lineari-lanceolatis, mucronatis, nervosis. 

 Receptaculum copiosfe villosum. Flosculi aurei, copiosi, bi- 

 labiati, hermaphroditi, aequales : tuba inti^s hirsuto ; labia 

 exterior e ligulato, patulo, apice tridenticulato ; interiore alth 

 bipartito : segmentis linearibus, revolutis, apice obtuso, bar- 

 bato. Filamenta compressa, glabra. Antherce appendiculA 

 ipsius antherse longitudine, ligulata, coriacea terminatae, 

 basi long^ biaristatffi : aristis nudis, lineari-setaceis. Stylus 

 filiformis, glaber. Stigmata semicylindrica, truncata, minut^ 

 papillosa. Achenia longitudine fer^ involucri, angusta, te- 

 tragona, minute papilloso-scabra. Pappus pilosus, fulvo- 

 cinereus : radiis duplici ordine digestis, creberrimb denti- 

 culatis, basi solutis, deciduis. 



This genus constitutes the transition from the Cichoracea to 

 the more aberrant groups of the Labiatiflora. The habit and 

 the general resemblance of its flowers to those of the former 

 family, justify the place which I have assigned to it. I have 

 followed Lagasca and DeCandolle in restoring the old name 

 of Trixis, first applied to designate the original species of this 

 genus by Dr. Patrick Browne- but the genus having been united 

 to Perdiciiun by Linnaeus, the name was subsequently used by 

 Swartz to denote the Baillieria of Aublet. The third section 

 may probably be reckoned sufficiently distinct to constitute 

 another genus ; but this point I shall leave till further observa- 

 tions shall determine. 



Cleanthes. 



Perdicii sp., L. 



Receptaculum glabrum ! Flosculi indefiniti. Involucrum aequale. 



Involucrum simplici v. duplici ordine polyphyllum : foliolis sub- 



aequalibus. 



