353 
Introduced and naturalized in North and South America. 
4. POLYGONUM RIVULARE, Phil. Linnea, xxx. 199 (1859). 
Chili: near Santiago, on the Mapocho River (according to 
Philippi). 
This name is a homonym of P. rivulare, Roth, Nov. Pl. Sp. 
206 (1821), and therefore if Philippi’s species proves vatid it will 
have to be changed. 
5. POLYGONUM CaREYI, Olney in Proc. Prov. Franklin Soc., i. 
29 (1847). 
Maine: Orono (Fernald); Massachusetts: Amherst and Plain- 
field (Hitchcock); Rhode Island: Providence (Olney); New Jer- 
sey: Mickleton (Brinton); Pennsylvania: Pocono Mountain (Por- 
ter). 
6. POLYGONUM PERSICARIOIDES, H.B.K. Nov. Gen. ii. 179 
(1817). 
South America: Argentine Rep. Mendoza (Gillies); Chili: 
Valparaiso (U. S. S. P. Ex. Exp)., Desert of Atacama (Morong, 
1281); Peru: Lima (Wilkes’ Exp.); Bolivia: Cochabamba, 7,000 
feet (Bang, 1025); Mexico: Orizaba (Botteri, 584 and 254), San 
Luis Potosi (Schaffner, 883), Batopilas (Palmer, 137), Guaymas 
(Palmer, 211), Sonora (Thurber, 357); Texano-Mexican Boun- 
dary (Berlandier, 912 and 2342); Mexican Boundary Survey, 
1183; New Mexico: San Pedro River (Wright, 1778); Texas: 
.. Dallas (Reverchon, 698). Reported from Austin County, Texas, 
by J. M. Holzinger (Bot. Gaz. xvii. 295). 
7. POLYGONUM SEGETUM, H.B.K. Nov. Gen. ii. 177 (1817). 
P. segetum, H.B.K., var. genuinum, Meisn. in D.C. Prodr. 
xiv. 121 (1856). 
P. Ludovicianum, Meisn., in D.C. Prodr. xiv. 116 (1856). 
Louisiana (Teinturier); Cuba (Ramon de la Sagra); South 
America: Columbia (Funcke and Schlim, 2 50). 
To this species must be referred P. Ludovicianum. 
argument for P. Ludovicianum will not stand proving, because 
his principal character breaks down on the type specimen. The 
Plant is identical with P. segetum. The only distinctive charac- 
ter given is simply pubescent peduncles and pedicels in place of 
glandular ones. The diagnosis is incorrect, however, as some 
glands do exist on the original specimen. 
Meisner’s 
