668 



POLYGONACEAE. 



Vol. I. 



7. Persicaria Careyi (Olney) Greene. Carey's 

 Persicaria. Fig. 1636. 



Polygonum Careyi Olney, Proc. Providence Franklin 



Soc. 1 : 29. 1847. 

 Persicaria Careyi Greene, Leaflets 1 : 24. 1904. 



Annual, rough-glandular throughout, stem erect, 

 l°-3° tall, simple or sparingly branched above. 

 Leaves oblong-lanceolate or linear-lanceolate, the 

 uppermost nearly linear, a'-n' long, short-petioled 

 the midrib, ciliate, sparingly punctate; ocreae cylin- 

 or nearly sessile, acuminate at both ends, hispid on 

 dric, sparsely hispid, fringed with long bristles ; 

 racemes several, narrow, terminal, loosely-flowered, 

 drooping, i'-2i' long; calyx purplish; stamens 5 or 

 sometimes 8; style 2-parted to below the middle; 

 achene lenticular, broadly ovoid or obovoid, il"-ij" 

 long, short-pointed, thick, smooth and shining. 



In marshes, Maine and Ontario to Rhode Island, New 

 Jersey, Delaware and Pennsylvania. Ascends to 2000 ft. 

 in Pennsylvania. Also in Michigan. July-Sept. 



8. Persicaria Persicaria (L.) Small. Lady's Thumb. Heartweed. Fig. 1637. 



Polygonum Persicaria L. Sp. PI. 361. 1753. 

 Persicaria Persicaria Small, Fl. SE. U. S. 378. 1903. 



Annual, glabrous or puberulent; stem erect or 

 ascending, simple or much branched, J°-2° high. 

 Leaves lanceolate or linear-lanceolate, i'-6' long, 

 short-petioled or nearly sessile, acuminate at 

 both ends, conspicuously punctate, usually with a 

 dark triangular or lunar blotch near the centre, 

 their margins entire or slightly eroded, often 

 ciliate; ocreae cylindric, nearly glabrous, fringed 

 with short bristles; racemes solitary or panicled, 

 ¥-2' long, ovoid or oblong, dense, erect; calyx 

 pink or dark purple; stamens mostly 6; style 

 2-3-parted to below the middle ; achene broadly 

 ovate and lenticular, often gibbous or 3-angled, 

 i"-ii" long, smooth and shining. 



In waste places, throughout North America, ex- 

 cept the extreme north. Naturalized from Europe. 

 Often an abundant weed. Common persicary. Spotted- 

 knotweed. Red- or pink-weed. Heartsease. Peach- 

 wort. Willow-weed. Red-shanks. Lover's-pride. 

 Black-heart. June-Oct. 



9. Persicaria persicarioides (H.B.K.) Small. 

 Southwestern Persicaria. Fig. 1638. 



Polygonum persicarioides H.B.K. Nov. Gen. 2: 179. 



1817. 

 Persicaria persicarioides Small, Fl. SE. U. S. 378. 1903. 



Perennial, glabrous or minutely pubescent; stem 

 erect, decumbent or creeping, simple or branched, 

 l°-3° long. Leaves lanceolate or linear-lanceolate, 

 acuminate at both ends, punctate, short-petioled or 

 subsessile, li'-io' long; ocreae , cylindric, glabrous 

 or sparingly strigillose, fringed with short bristles; 

 spicate racemes more or less panicled, erect, 1-3' 

 long, narrowly oblong or linear, loosely-flowered; 

 calyx rose-color tinged with green, 5-parted to below 

 the middle; stamens 8 or fewer, included; style 2-3- 

 parted to near the base; achene lenticular and 

 biconvex, or 3-angled, more or less gibbous, 1" 

 long, ovoid or broadly oblong, short-pointed, black, 

 minutely granular, but shining. 



Nebraska to Mexico ; widely distributed in tropical 

 America. June-Sept. 



