346 TuUia Pycnanthemoides. 



PerU6mia,—Ca\. labiis indivisis, dorso gibberoso, fructifer clausus. 

 Corol. tubo arcuato |. Anthera? didymae. Caiyopsides alataj. 



Hemiandra. — Cal. |. Corol. |, labii infer, lobo medio 21obo. 

 Stam. adscendentia, antheris didymis, loculo altero casso. 



Synandra. — Cal. |. Corol. \, fauce inflata. Filamenta tomen- 

 tosa, antherse superiores loculis superioribus cassis cohserentes." 



From this synopsis it will be obvious that our plant can be referred 

 to none of these genera. From that section of the genera which is 

 characterized by a calyx (cqualis, it is obviously excluded by the 

 form of its perianth : but it seems to approach nearer to the genus 

 Pycnanthemum, than to any other. 



According to Michaux, the founder of that genus, its natural char- 

 acter, (in contradistinction from Brachysiemum,) is as follows, viz : 



" Calyx tubulosus, raultistriatus, quinquefidus j denlibus erectis, 

 semi-lanceolatis, seu subulatis. 



Corolla, — tubus longitudine calycis ; labium superius subrecurvo- 

 porrectum, oblongiusculum, modice convexum, apice rotundatum, 

 subintegrum ; labium inferius multo majus, recurvo-patens ; subcan- 

 aliculatum trifidum ; laciniis lateralibus subsemiellipticis, intermedia 

 longiore, pauloque latiore, nonnihil repandula. 



Stamina exserta, distantia, duo labio superiori longitudine subse- 

 qualia, duo conspicue breviora ; antheraj loculis subparallelis, etc. 



Ohservatio. — Genus affine Satiireice. 



Habitus. — Herbffi perennes seu sufFrutices, Folia punctata. 

 Capitula subsimplicia seu coraposita, multibracteata." 



The natural character of Michaux's Genus Brachysthmim, which 

 has been since united with Pycnanthemum, is as follows : 



" Calyx tubulosus ; dentibus quinque brevibus, subasqualibus, 

 erectis, acutis ; fauce nuda. 



Corolla. — tubus longitudide calyci^, gracilis ', labium superius 

 breve, porrectum leviter emarginatum 5 labium inferius multoties am- 

 plius, peSens, obtuse trilobum, intermedio productiore, subligulato- 

 oblongo. 



Stamina filamentis brevissimis inclusa, subsequalia. 



Semina cylindraceo-oblonga. 



Habitus. — Labiatse perennes ; folia puncticulosa ; verticilli con- 

 fertiflori seu capitula ; bracteolis ciliatis." 



The essential character of these two genera united, as given by 

 Pursh, is " Involucrum muhi-bracteatum, capitulis subjectum ; calyx 

 lubulatus striatus. Corolla labium superius subintegrum, inferius 

 trifidum= Stamina subsequalia/' 



