niOEClA. PENTANDRIA. 2ST 



Leaves opposite entire; flowers paniculate, axillary ancj 

 terminal. 



Species. 1. I. celosioides.—\ p^enus of about 6 species 

 indigenous to tlie warmer parts of America. 



91. ACNIDA. L, 



Masc. Calix 5-parted. Corolla none. Fem. 

 Calix 3 -parted. Corolla none. Stijles none. 

 S^z'^ma*" 3, sessile. Capsule, 1-seeded. 



Annual, subaquatic plants wiih the aspect of Amaran- 

 thus, scarcely distinct from Spinacia. Stems grooved, 

 leaves lanceolate, entire; flowers glomerate, axillary, sub- 

 rr.cemose; stigmas sometimes 4 ox* 5, the fruit then 4 or 5- 

 angled. 



Species. 1. A. cayviabina. 2. msocurpa. — A Xorth 

 American genus indigenous to river marshes from Canada 

 to Florida. 



92. HUMULUS. i. (Hop.) 



Masc. Calix 5-lcavcd. Corolla none, Fem. 

 Calix 1 -leaved, obliquely spreading, entire. 

 Corolla none. Styles 2. Seed 1, within the leafy 

 calix, (or strobilus.) 



An herbaceous twining- and asperate plant; leaves oppo- 

 site, trifid; stipules connate below; male flov.ers alternate 

 and loosely paniculate, axillary and terminal; female ones 

 verticillate and sessile, densely spiked, spikes or heads 

 pedunculate, axillary and terminal, paniculate, divisions, 

 of the panicle stipulate. 



Species. H. Lvpulus. v.v. Abundant on the banks of 

 the Missisippi and Missouri. 



Order VI.— HEXANDRIA. 



793. SIMILAX. JL. (Green Brier, Sarsaparilla.) 



Masc. Ca^fo; 6 -leaved. Corolla none, Anthers 

 adnate to the filaments. Fem. Flower similar 

 to the male. Style minute. Stigmas 3. Berry 3- 

 celled, superior; 1, 2, or 3-.si.eded. 



Stems scandent, suflTruticose or herbaceous; leaves al* 



