A 



SYSTEM OF GENERA 



roa THE 



NORTHERN STATES. 



CLASS I. MONAXDRIA. 



Order I. Monogynia. 



Salicornia. Calyx inflated, entire : corol o : 

 seed 1, inclosed in the calyx. 12. 29 — virginica, 

 (samphire) branches undivided — herbaceay divided. 



©■ 



HiPPURis. Calyx superior, obsolete, with a 2- 

 lobed margin : corol o : seed I : stigma simple. 



15. 6 Vulgaris^ (marestail) leaves linear, whorl- 



ed. 1}., 



* Scirpus, Cyperus. 



Order II. Digynia. 



Callitriche. Calyx inferior, 2.1ea.ved : cap- 

 sule membranaceous and margined : ( flowers 

 sometimes monoecoius, and by some the calyx is 

 called the corol.) 12 6 — autumnalisy (water-star- 

 ■wort) leaves all linear — intermedia, stem-leaves 

 linear only — verna, flowers androgynous. 0. 



Blitum. Calyx 3-cleft, berry-like : corol o : 

 seed 1. 12. 29. — cafiitatum, (blite) heads alternate 

 *~~virgatum^ heads scattered, (x)- r. 



CiNXA. Calyx a l-flowered glume, 2-valved : 

 corol a 2-valved glume ; seed i. 4. 10 — arundina* 

 cea, panicle large, many- flowered. 2/. 



* Uniola. 



B 



