366 PROCEEDINGS OP THE AMERICAN ACADEMY 



duced, and by analogy a leading distinction of the preceding genus 

 considerably invalidated. 



Hedeoma Pers. — Under Euhedeoma, I arrange our species 

 as follows, 



* Filamenta stam. sup. conspicua antheram abortivam capitellatam 

 nunc vix imperfectam gerentia : calyx egregie bilabiatus, labiis 

 difformibus. 



H. pulegioides Pers. — Cis-Mississippiana. 



* * Filamenta superiora aut minuta subulata nuda, aut obsoleta : 

 calyx dentibus omnibus subulatis. 



n— SubasquilongiS, post anthesin erectis vel sursum curvatis : an- 

 nua?, erectae, bracteis lineari- vel aceroso-subulatis demum reflexis 

 patentibusve. 



H. acinoides Scheele in Linnasa, 22, p. 592. Subglabra, latifolia ; 

 calyce fauce parum pilosa, limbo vix bilabiato corolla 2 - 3-plo bre- 

 viore. Arkansas, Texas. 



H. hispida Pursh. Foliosa, angustifolia ; calyce bilabiato, tubo cum 

 foliolorum linearium marginibus pilis bispidis instructo, dentibus corol- 

 lam adaequantibus, inferioribus magis aristiformibus bispidis. H. hirta 

 Nutt. — Trans-Mississippiana. 



•*— -i— Calycis dentibus inferioribus superiores superantibus : bracteae 

 saepius erectas pedicellis breviores. 



++ Perennes basi lignescente ; foliis subsessilibus, venis validis in 

 dentes salientes excurrentibus. 



H. plicata Torr. Bot. Mex. Bound, p. 130. — S. W. Texas. 

 H. dentata Torr. 1. c. pro parte. — Arizona. 



++ ++ Annuae basi indurata quandoque perennes ? foliis integerrimis 

 parce crenulatisve, venis haud prominulis convergentibus. 



H. piperita Bentb. Lab. p. 730 ? Cinereo-pubescens vel puber- 

 ula; foliis ovatis obtusis basi saepius rotundatis, floralibus supremis 

 nunc oblongis petiolatis ; verticillastris laxis pauci — plurifloris ; calyce 

 oblongo-tubuloso gibboso hirsuto, limbo satis bilabiato, labio superiore 

 patente dentibus subulatis, inferiore dentibus magis setaceis longioribus 

 erectis corollam subaequantibus. H. dentata var. nana, Torr. 1. c. — 

 Accords with Bentham's character of Mocino and Sesse's plant, except 

 that the calyx is by no means twice the- size of that of H. pulegioides. 

 — New Mexico, Arizona, and adjacent parts of Mexico. 



