URTICACE.E. 909 



7 U DivARicATA. Sum erect, branching, covered with stings. Leaves aj- 

 icmate, ovate, acuminate, smooth, serrate, on long, ciliate petioles. Panicles 

 axillary, solitary, divaricately branched. 



% July — Aug. Damp, rocky situations. 2-3 ft. 



b U Canadensis. Siem erect, branching, hispid, with stings. Leatts al- 

 ternate, cordate-ovate, acuminate, hispid. Flovxrs in axillary panicles, the 

 lower ones sterile, the upper fertile. 



% July— August. Wet soils. 5-6 ft. 



Ge-nus II PARIETARIA. 



Floicers poly^fiiiioui>-, surrounded by a many cleft involucre. 

 Perfect Jlvrcis ; |ieiiaiuli 4-cleft. ^tauicns 4. Style I. Pin- 

 filiate florets ; perianth 2-4-cleft. Style i. 6'cerf 1, enclosed 

 by the perianth. 



1 P Pexnsylvaxica. .Sfem simple, erect, striate, pubescent, /.car*'.'! al- 

 ternate, iliLear-lanceolate, pubescent, with opaque dots. Involucre 3-leaved. 

 Fk'uerf in comp.icf, axillary clusters. Perianth oblong, persistent, enclosing 

 the seed. 



O June. Upper di-c. Car.. &, Ga. 12-15 in. 



2 P Floridana. Stem decumbent, with erect branches, pubescent near 

 the sunitnit. Leaves ovale, pubescent, dotted, sometimes nearly round. — 

 Floirerg in a.xillary clusters Leaves of the involucre nearly linear. 



G May — Oct. Damp, sandy soils. 12-18 in. 



Genus 111 HL'.MULUS. 



Perianth did.' c'lov.s. Sterile florets : periantli 5-parled. — 

 Stamens 5. Fertile florets ; scales of the nuieiit large, per- 

 sistent, concave, entire, 1 -flowered. Pirianth none. Sti/les 

 2. Seed 1. 



1 H LuPTLCs. vS^/e;n twining, scabrous. Z,eo re< opposite. 3-5-lobed, sca- 

 brous, - ' ' fiorets ; panicula'e, axillary and terminal. Fertile 



florets. 5sessile. 



'2^. August. .Mountains. 



Ce.\us IV BCEHMERIA. 



Monoecious, or d'oecious. Sterile florets ; perianth 4-parted. 

 Stamais A. Fertile florets ; perianth none. Style}. yut 

 compres.sed. 



IB'"" ^ • J obtusely 4-angIed, glabrous. Leaves opposite, 



ovate-t . .t-ntate, smooth. Fltnter dioecious. Sterile spikes 



clustered, iiiit-rrupu-d. i ertile ones cyiindncal. 



% June — -Ang. Wet ground?. 2-3 ft. 



2 B Lateriflora, ^tem smooth, with opposite branches. Leaves alter- 

 nate, ovate- la nceulafo, acuminate, serrate, scabrous, on long petioles. FIok-' 

 ers in lateral and axillar>' c'usters. 



% July. Shady woods. 



Orpfr CXXXVI. ULM.\CE.E. 



Flowers perfect, of polygamous. Perianth divided, cani- 

 panulate, inferior. Stamens definite, 5-8, inserted into the 



