POLYGON ACE .35. £05 



or Boating and rooting. LeaVK 5 to 7 inches long, 1 to 2 inches wide, often fhiu- 

 Ing. Stipules large, sheathing, mostly torn. Fkwert roso-r^d, iu spikes 1 to 3 

 Laches long. 



7. P. Virginianum, L. Virginian Perslcaria. 



Nearly smooth; stem angled, upright; leaves ovate orlha upper ovat^ianceolatt, 

 acuminate, rounded at the base, short-petiolcd, rough-ciiiate ; sheaths cylindrical, 

 truncate, hairy and fringed J flowers loosely disposed in a long and slender naked 

 eplkc; stamens 5; sty'es 2, uneqal. 



Thickets in rich soil, common. Aug. Stem 2 -to 4 feet high. Leaves 3 -to6inelic8 

 ■■ 1', on p t'.oles Y\ to \i i' 10 ' 1 l° n £i -/"'■« 10 to 2D inches long, s:ui>.a 

 or with pas or two branc rs small, white. 



8. P. ORIENTA.LE, L. Prince s Feather. 



Tall, branching, somewhat hairy ; leaves ovate, pointed, petioled; upper theatht 

 gal vex- numarous, nodding ; stametis 7 ; styles 2. 



Escaped irom cultivation, and naturalized about gardens and ^vas'o grounds. 

 A'tt j., Ssjpl Stem 4 to 6 feet high, erect, paniculately branched. Leaves 8 to 12 

 in . - . >. . 5^ as wide. Flowers bright rose colored, open, iu nuni-rous large 

 piurn.'-like terminal spikes. 



* * Av:c5L .ma, !dVun. Flowers greenish-while, axillary ; stamens bio$; dlgraat 3. 



0. P. A?wVrouLA!!iA, L. Kadi-grass. Gooze-grass. 



Prostrate or spreading ; leaves sersile, lanceolate or oVong; Jlovoers apparently 

 Bsssile; sJiaithi much shorter than the lower leaves; fru.it enclosed in the calyx. 



Roadsides, door-yards and waste places, common. Juno — Nov. Stems slender, 

 % to 1] < 2 fp )t Ion :, smooth, bran hing, with short white torn stipules at the joints. 



long. '4:1s w;de. Flowers greenish-white. Var. ereetum, I 

 (>.\ ereetum, L.) bas uprignt or ascending stems, larger cvai or elliptical leaves a^J 

 . 5 stamens. 



10. P. t;;nue, Miehx. Skfyier Knot-gras». 



Stem low $ f sparingly xhranched, sharp- angled ; leaves aeteile, 



narrowly-linear, very acute; sheaths capillary-fringed; flowers nearly sessil^ oiien 

 solitary. greenish- white; fruit nearly smooth, shining. 



Dry Soil and r icky bills. Ju!y — Sept. PXantS to 12 inches bigh. Leaves 1 to 1}£ 

 inching. % to yi^-: wide, sessile, 3 veined. Rtiwoen greenish-M h.te. 



* * * Hblxisb, L. Calyx 5 puted. pale-rose-colored or white ; 1 tamens mostly 8; styles 

 or capitate stigirtas 3 ; leaves iieart-siuiped or arrow shaped ; annuals. 



11. P. ARIFOLIUM, L. Ildhart-leaucd Tear -thumb. 



Sten groove-angled; leaves halbjrt-shaped, acuminata, long-pcticlcd ; flowers 

 somewhat raeemed, few; peduncles glauduiar-bristly ; calyx often 4-parttd, ctcsed; 

 ttamens G; dytes 2, very short. 



Low grounds. Au^. Stem flaccid, somewhat climbing, by the rcSexed prickles 

 which b.set its angles as well as the petioles. Leaves 2 to 5 inches long and )/ 2 !J 

 wide, the divergent lob'.s at the ba.se pointed. Clusters racemose, slender, iooo*, 

 few-flowered at the ends of the blanches. Flowers pa.e ro.-e coiortd. 



12. P. sagittatum, L. Scratch-grafs. 



Stem 4 angled ; leaves arrow-shaped, short-petiolcd ; flowers capitate; peduncles 

 smooth ; stamens 8; styles 3, slender; fruit sharply 3-augled. 



Low grounds, common. July — Sept. A climbing plant often several feet in 

 length, smooth except the angles of the stem and midrib beneath, which are close- 

 ly beset with a line of sharp prickles pointing downwards. Leaves acute, 1 to 3 

 inchesiong, J^ as wide, on petioles %to% inch long, withbmooth stipules. Flew* 

 ers whitish iu small terminal heads. 



K2* 



